In the summer of 2019, the surface sediments of Nam Co, Wuru Co, Gren Co, Qiago Co, Dazz Co, Saibu Co, Gomang Co, Guomang Co, Bamu Co, Nurma Co, Nariping Co, Zhi Co, Jiang Co, Daru Co and Yueqia Co lakes in Nam Co and Siling Co area were collected by grab. The lake sediments were brought back to the laboratory and frozen, and then put into the freeze dryer for freeze drying, The freeze-dried samples were ground to powder by agate mortar, and then the samples were tested by XPert3 Powder X-ray diffraction method. Based on the analysis of Highscore Plus0 software, the content of each major mineral was obtained. The results show that the main minerals in this area are stalagmite, aragonite, calcite and illite.
MENG Xianqiang
The influence of deformation and metamorphism of post volcanic massive sulfide on the trace elements and sulfur lead isotopic composition of sulfide is still unclear. The Keketale VMS Pb Zn (- Ag) deposit provides an opportunity to solve the above problems; Five ore samples from No.7 and No.9 orebodies were crushed and screened for lead isotope analysis of bulk minerals, 17 polished thick sulfide samples were used for in-situ trace element and sulfur lead isotope analysis, 66 trace element determination points were analyzed, and 25 sulfur isotope points were determined; A total of 18 point pairs of different minerals were selected for lead isotope analysis, and LA-ICP-MS method was used
YU Pengpeng, ZHENG Yi
This data set comes from papers: Cui, A.N., Lu, H.Y., Liu, x.q., Shen, C.M., Xu, D.K., Xu, b.q., Wu, n.q., 2021. Tibetan Plateau precision modulated by the periodically coupled western and Asian Mongolia. Geophysical research letters, 48, Based on the advantage of accurate dating of the annual laminar sediments of the lake Kusai in the northern Tibetan Plateau, the authors analyzed the changes of plant sporopollen species in the area around the lake Kusai in the past 1656 years (350-2006) with high resolution (~ 5-year resolution), Based on 735 representative soil sporopollen assemblages and meteorological interpolation data within 800 km of Lake Kusai and its surrounding areas, a high-precision sporopollen annual precipitation conversion function was established to quantitatively reconstruct the precipitation and annual mean temperature changes in the past 1656 years. This data set provides a reference for studying the past climate change law and predicting the future climate change trend of the Qinghai Tibet Plateau.
LV Houyuan
The data sets contains the content of fungal spores and (Ce+Fa/Po+Fa) ratio data from Gonghai Lake (38°54′N, 112°14′E, altitude 1860 m) in northern China over the past ~2000 years. We calculated pollen (Ce+Fa/Po+Fa) ratio of 321 samples and we identified the fungal spores of 216 sedimentary samples to reconstruct changes in cultivation and grazing intensity over the past ~2,000 years in northern China. Time-series analysis reveals that the arable farming phases had a longer periodicity than the grazing phases, possibly because of the greater resilience of the former to climate change and the attachment of agriculturalists to their land. Our findings potentially help improve our understanding of the impact of land use on soil degradation. The data is stored in Excel format.
HUANG Xiaozhong, ZHANG Jun
In the dense area of stone products exposed to the ground, five different sizes (about 2 × 3 m). The stone materials are collected and analyzed in detail by using technology typology. In addition, it has a tetrahedral selection of 1.2 × 5 m of soil and 10 cm of topsoil were removed. These 10 – 50 cm soil samples were screened by wet sieving at 2 cm intervals, and the residues found in each layer were counted. At the same time, the djcn 3-2-2 profile (No. 1-10) exposed and scattered on the ground of the study area was measured and excavated on ten hearth. The profile was collected from local sedimentary strata about 2 m southeast of the site. The section is about 100 cm thick. According to the lithology and color of the sediments, two main stratigraphic units are identified. Between 0 and 90cm, the stratum is composed of light yellow loess, where there are two buried cultural layers rich in charcoal. 24 – 28 cm and 30 – 32 cm, respectively; In the lower layer of D, 90-100 cm depth is blue gray lacustrine sediments. 45 samples were collected at 2 cm intervals along the cross section for measuring particle size, magnetic susceptibility, pollen, charcoal and fungal spores; Three charcoal samples (djcn 3-2-2c1) were collected from the furnace and burned soil in the field, and djcn 3-2-2c2 and djcn 3-2-2c3 from the burned soil (No. 5 and No. 8 hearth) were collected from AMS14C dating of beta analytical company in Miami, Florida, USA. AMS14C dates were further converted to calendar year values by using the intcal 13 calibration curve of calib Rev 7.0.2 program (stuiver and Reimer, 1993) (reimeret et al., 2013). Physical geography and environmental process of Qinghai Normal University. Spectrometer (ICP-MS). The unexposed middle part was used to measure the equivalent dose (DE). We also use automatic RIS ø The OSL measurements were obtained by TL / osl-da-20-c / dreamer. 90Sr / 90Y beta light source was used in the laboratory. Sample preparation included treatment with HCl (10%) and H2O2 (30%) respectively to remove organic matter and carbonate. Select 38 to 63 by wet sieving µ And treated with H2SiF6 for about 2 weeks. Water content 10 ± 5% to calculate age (stauch et al., 2012). The particle size and magnetic susceptibility were measured in the Key Laboratory of physical geography and environmental process of Qinghai Province, Qinghai Normal University. Standard processes were used for particle size analysis, including removing carbonate and organic matter with HCl (10%) and H2O2 (10%), respectively, and treating dispersant with 10 ml of 10% (NaPO3) 6 and shaking with an ultrasonic cleaning machine to fully disperse the particles (Lu and an, 1997). Susceptibility was analyzed with MS2 dual frequency susceptibility meter produced by bartington, UK. The low frequency magnetic susceptibility is obtained by calculating the difference between the average of three low frequency magnetic susceptibility values and the average of two background values. The fungal spores, charcoal and pollen samples were treated with HF (faegri and Iversen, 1989; Moore et al., 1991). The samples were boiled in 10% HCl and 10% KOH to dissolve calcium minerals and humus. The sample is then passed through 200 µ M sieve, and treated with 40% HF to digest the fine silica. Next, pass the sample through 7 µ M screen to remove clay sized particles. Finally, the samples were stored and fixed in glycerol jelly. Pollen and fungal spores were identified at 400 and 1000 magnification. The identification of fungal spore morphotypes is based on comparison with the descriptions and illustrations of van geel (1978), van geel et al（ Pollen and fungal spores of van.300 were recorded for each sample and expressed as a percentage of the total content. Pollen and fungi were first isolated by adding Lycoris radiata spores (27637 ± 563 spores) to calculate spore concentration values, and then use Tilia and Tilia graph software to make charts (Grimm, 2011). Charcoal was counted and divided into two types, namely 20 – 100 µ M and > 100 µ m。
HOU Guangliang
In June 2017, we found Jianzui site (36.95%) ° N,99.61 ° E; The altitude is 3350m), and 1m above the surface × According to its structural characteristics, it can be roughly divided into four layers: the first layer (0 ~ 30cm), which is the present representative soil layer, developed with modern alpine meadow soil; the second layer (0 ~ 30cm), which is composed of three layers: the first layer (0 ~ 30cm), developed with modern alpine meadow soil; The second layer (30 ~ 85CM) is gray black silty clay layer Mixed with a large number of charcoal chips, there are pottery pieces, animal bones, stone tools and other cultural relics unearthed, of which the bones are mostly broken pieces, and some are suspected to be bone artifacts; The pottery and bones (part) have obvious traces of fire. The stone tools are made of stone tools with rough technology, and their lithology is consistent with the nearby exposed bedrock, which indicates that they are made from local materials; The third layer (85 ~ 130cm) is sandy loess with loose soil. A thin layer of light red paleosol (about 2 ~ 3cm thick) is developed at the bottom of the layer, which belongs to primary sedimentary strata and has little interference from human activities; The fourth layer (below 130cm) is bedrock without any cultural relics. In this study, the reference specimens are mainly from the laboratory of animal archaeology, scientific and technological archaeology center, Institute of archaeology, Chinese Academy of Social Sciences and the Institute of Paleovertebrates and Paleoanthropology, Chinese Academy of Sciences. Please refer to the manual of Chinese vertebrate fossils, After the identification and collection of animal bones, charcoal scraps and other cultural relics, four dating samples (a45b, a75c, a75b and a87c, respectively) were selected from the 45cm, 75cm, 75cm and 87cm layers of the profile strata, It was sent to the beta Laboratory of the United States for accelerator mass spectrometry (AMS) 14C dating. The 14C dating obtained was corrected to calendar year by using the intcali13 tree ring correction curve in calibrev702
HOU Guangliang
Based on the previous research results, this paper collected the palynological sequence of the plateau strata from the published literature at home and abroad, and selected reliable records, in order to explore the information of human activities in this area. The selection principles are as follows: (1) the palynological sequence time should cover the middle and late Holocene (since 6.0kabp.)（ 2) The time series are expressed quantitatively in calendar year or 14C year time system（ 3) It has high resolution（ 4) According to the above principles, 28 fossil sporopollen sequences are selected in this area. Age correction: some of the 28 sequences are calendar years, and some are carbon 14 dating, so they are corrected to calendar years. Data acquisition: the sequence is quantified, and the sporopollen content and corresponding age of the sequence are read to ensure the validity of the data, The inflection point data is selected first, and the average sporopollen content data of less than 100 years is selected. A total of 568 sporopollen records are obtained from 28 sequences, Abstract and calculate the parasporal pollen records since the middle and late Holocene (6.0 ~ 2.0 Ka B.P.) in the merging cost area. Based on the original parasporal pollen records extracted from 28 stratigraphic fossil sporopollen sequences, the deviation method is used to standardize the sequence, so as to eliminate the dimensional differences between different sporopollen types and compare them, The original data after standardization is converted into standardized values, and then the average value of each record in each partition is calculated, so that it can be combined with the sporopollen records in the cost area, which is called companion index in this paper. It means that the higher the index is, the stronger the intensity of human activity is, and the lower the index is, the weaker it is
HOU Guangliang
The data is based on the published archaeological materials in Gansu and Qinghai areas, and the excavation reports of 21 sites in 7 Cultural sequences in the study area, including 12 sites in Gansu and 9 sites in Qinghai. By using the method of mathematical statistics, this paper sorts out the quantity, height and combination of the pot, bowl, basin, pot, Zun, Weng, Dou, bowl, plate, cup, pan, bottle, jar and steamer of the Neolithic Bronze Age in Gansu Qinghai area. In view of the fact that there are many kinds of cultural relics in some sites, this paper uses the method of repeated statistics of cultural periods to determine the data of a certain cultural type. By using the method of mathematical statistical analysis, this paper makes a statistical analysis of the collected data, and analyzes and interprets the relationship between the data by drawing the change trend chart; In addition, this paper calculates and summarizes the quantity proportion and combination of a certain utensil in its cultural sequence, so as to ensure the cross validation among the three, further reveal its changing characteristics and reveal its changing rules. This paper mainly discusses the evolution of the four types of commonly used pottery, and analyzes the factors that may affect the evolution of pottery in combination with the paleoclimate records and archaeological data in Gansu Qinghai region and its surrounding areas.
HOU Guangliang
The data used in this paper are: the range and boundary data of the Qinghai Tibet Plateau [12]; 90 m in the international scientific data mirror website of computer network information center of Chinese Academy of Sciences (http: / / www.gscloud. CN) × DEM data products with 90 m spatial resolution; The site data is mainly based on the results of the second national cultural relic survey, combined with the cultural relic Atlas of relevant provinces. In the process of data processing, firstly, the specific location of the site is determined, and the site with unknown longitude and latitude is interpreted with google satellite map; Secondly, according to the identification standard of China's cultural relics census, the sites are classified and dated (excluding the points with unknown age), and a small number of cross age sites are calculated repeatedly. Finally, according to the characteristics of archaeology, history and chronology system, the sites in the study area are counted according to the comprehensive division method of cultural type and history. The application of GIS and RS in the research of settlement and regional archaeology is becoming more and more mature. The shortest path in GIS is used to simulate the prehistoric traffic route of the Qinghai Tibet Plateau, and the kernel density estimation method is used to calculate the data aggregation of the whole region according to the input feature data set, so as to produce a continuous density surface. The results show that the distribution probability of the research object can be directly expressed, and the size of the kernel density represents the agglomeration degree of the site in the spatial distribution. The larger the kernel density estimation is, the denser the distribution density of the site is. The distance between the centroid of each element and its nearest element is measured by the average nearest neighbor index, and the average value of all the nearest distances is calculated, and compared with the average distance in the hypothetical random distribution, so as to judge whether the studied elements are clustered distribution. The description of the spatial distribution characteristics of attributes in the whole region is used to judge whether a certain element or phenomenon in the study area has aggregation characteristics in space. In this paper, the global Moran's I index is used to measure the global spatial autocorrelation degree of the sites in the Qinghai Tibet Plateau.
HOU Guangliang
The surface palynological data in this dataset are from the East Asian palynological database（ http://eapd.sysu.edu.cn/database/ And the surface pollen data of the northeastern margin of the Qinghai Tibet Plateau. The precipitation data of surface soil palynological points were obtained from the annual average precipitation data of 126 meteorological stations in the Qinghai Tibet Plateau and its surrounding areas (Xinjiang, Gansu, Sichuan) from 1950 to 1980 (the data came from China Meteorological Science Data Sharing Service Network) http://www.data.ac.cn/xiazai/ ）Because topography has a great impact on climate change, Therefore, in ArcGIS, the uneven distribution of annual precipitation data of meteorological stations is transformed into grid data on the surface of the Qinghai Tibet Plateau by Kriging spatial interpolation method, and the precipitation grid data of the surface palynological point can be regarded as the actual precipitation data of the point. By using the method of transformation function, the representative surface palynological types are selected, and the linear regression between them and modern climate is established. The fossil Palynological Assemblages are substituted into the regression equation to obtain paleoclimate parameters. Using the modern analogy method (MAT), assuming that the relationship between vegetation types and climate in the past is corresponding, we can compare the sporopollen spectrum of the strata indicating vegetation types with that of the present representative soil to reveal the similarity between them. Then we can get the corresponding precipitation data of the strata sporopollen by matrix operation with the modern precipitation data of the corresponding points.
HOU Guangliang
The site data of this data set comes from the prehistoric archaeological investigation report of Hexi Corridor compiled and published by Gansu Institute of cultural relics and Archaeology and Peking University School of Archaeology and culture in 2011. Map data comes from the national science and technology infrastructure platform -- National Earth system science data sharing service platform（ http://www.geodata.cn/ ）Including: 90 m resolution DEM of China; China 1:250000 first, third, fourth and fifth river classification data sets; 1 ∶ 4000000 vegetation data set of China; 1 ∶ 100000 desert data set in China. By sorting out the archaeological survey data of Hexi Corridor, applying the methods of cultural distribution boundary value and cultural center of gravity, this paper comprehensively analyzes the spatiotemporal evolution process of ancient culture in this area, and extracts the current environment (elevation, river, vegetation and sand) information of corresponding sites by using GIS technology, It also analyzes the driving mechanism of the evolution of ancient culture in the region. This data set can directly provide some regular support for the ancient and modern evolution of the sites in Hexi corridor.
HOU Guangliang
In July 2017, our team carried out field vegetation quadrat survey and livestock manure sample collection in Henan and Zeku counties. Random sampling 100 m × 5 ~ 10 pieces of unweathered excrement of the same grazing livestock in 100 m area were mixed into a sample and sealed for preservation. A total of 49 livestock manure samples were collected, including 30 yak (bosgrunniens), 11 horse (Equus ferus cabellus) and 8 sheep (Ovis aries). GPS was used to locate each sampling point, and the vegetation community and main vegetation types within the sampling point were recorded. The dry weight of each sample was 2 g. before sample treatment, 1 Lycopodium spore (27637) was added to each sample ± 563 grains per tablet were used to calculate the sporopollen concentration. Remove the calcareous cement with 10% HCl, after 200 μ The larger particle size of plant residues was removed by M sieve, and the organic matter was removed by 10% KOH in water bath at 70 ℃; Then 40% HF was added to remove the silicate. Finally, 7 μ The sporopollen was enriched by nylon sieve, cleaned and preserved in glycerin. The identification of sporopollen was carried out under 400 times optical biological microscope with reference to the sporopollen morphological atlas and literature. Tilia software was used to draw the sporopollen percentage map. The principal component analysis of sporopollen data was carried out by using canoco5.0 software. This data not only provides new research ideas and means for evaluating grazing livestock feeding habits and the impact of animal husbandry activities on regional vegetation in the Qinghai Tibet Plateau, but also provides important modern process basis and reference data for carrying out pollen analysis of fecal samples preserved in archaeological sites in the Qinghai Tibet Plateau in the future, so as to reconstruct the information of ancient vegetation communities and ancient human production activities.
HOU Guangliang
Mercury is a global pollutant.The Qinghai-Tibet Plateau is adjacent to South Asia, which currently has the highest atmospheric mercury emissions, and could be affected by long-distance transport.The history of atmospheric mercury transport and deposition can be well reconstructed using ice cores and lake cores. The history of atmospheric mercury deposition since the industrial revolution was reconstructed based on 8 lake cores and 1 ice core from the Tibetan Plateau and the southern slope of the Himalayas.This data set contains 8 lake core data from Namtso, Bangongtso, Linggatso, Guanyong Lake, Tanggula Lake, Gosainkunda Lake, Gokyo Lake and Phewa Lake, and 1 ice core data .The resolution of ice core data is 1 year, lake core data is 2~20 years, and the data include mercury concentration and flux.
KANG Shichang
The data set includes the characteristics of ancient glacial sediments, such as grain size characteristics, sporopollen characteristics, environmental indicators of chemical elements, mineral characteristics of sediments, etc. Table 1 shows the analysis of five samples collected from the red moraine of Q2, which shows that the grain size characteristics of different ages are the difference of grain size distribution caused by weathering strength. The earlier the moraine is formed, the farther the grain size characteristics of the moraine are from the typical moraine facies. According to Tang Lingyu's (1984) analysis of spores and pollen in lignite (Table 2), there are many clouds and firs, but there are many warm loving Castanea, Liquidambar and Quercus, which indicates that the mountain is dark coniferous cold temperate to warm temperate vegetation, while the piedmont plain is warm temperate or even mountain subtropical vegetation, and its altitude is not very high. The sporopollen analysis data of four surface soil samples and Q31 and q32 moraine samples from high to low altitude on the east slope of Gongga mountain show that the SPOROPOLLEN ASSEMBLAGES OF Q31 and q32 moraines are not significantly different from those at present (tables 3 and 4). The chemical elements of moraine samples were analyzed by icpq plasma analyzer. The results show that the other 18 elements can reflect the weathering degree in different degrees except Fe2O3, which is too influenced by local lithology to retrieve the information of age and weathering degree. There are 28 fine-grained samples, and the results are summarized in the table below. The analysis results of Hengduanshan moraine samples are shown in Table 6. It can be seen that there is little difference in the most stable mineral content of the Moraine in different periods. The mineral characteristics of the Moraine in this area clearly reflect the relationship between it and weathering time. It is hoped that through the geochemical study of the temporal and spatial sequence of glacial deposits, the indicator of element migration can be established for the study of Quaternary glacial environment in China.
LI Jijun
Relationship between modern pollen and climate, and its representative to vegetation are the important references in explaining and reconstructing past climate and vegetation qualitatively or quantitatively. To extrct past climate and vegetation signals from fossil pollen spectrum of a lacustrine sediment, a corresponding modern pollen dataset collected from lake-sediment surface is necessary. At present, there are a few modern pollen datasets extracted from lake sediment-surface established on the Tibetan Plateau, however, the geographic gaps (e.g. the central and east Tibetan Plateau) of available sampled lakes influence the correct understanding. To ensure the even distribution of the representative lakes, we collected lake sediment-surface samples (n=117) covering the alpine meadow evenly on the east and central Tibetan Plateau, in July and August 2018. For pollen extraction, approximately 10 g (wet original sediment) per sample were sub-sampled. Pollen sample was processed by the standard acid-alkali-acid procedures followed by 7-μm-mesh sieving. More than 500 terrestrial pollen grains were counted for each sample. Pollen assemblages of the dataset from alpine meadow are dominated by Cyperaceae (mean is 68.4%, maximum is 95.9%), with other herbaceous pollen taxa as commen taxa including Poaceae (mean is 10.3%, maximum is 87.7%), Ranunculaceae (mean is 4.8%, maximum is 33.6%), Artemisia (mean is 3.7%, maximum is 24.5%), Asteraceae (mean is 2.1%, maximum is 33.6%), etc. Salix (mean is 0.4%, maximum is 5.3%) is the major shrub taxon in these pollen assemblages, while arboreal taxa occur with low percentages generally (mean of total arboreal percentages is 0.9% (maximum is 5.8%), including mainly Pinus (mean is 0.3%, maximum is 1.8%), Betula (mean is 0.1%, maximum is 0.9%) and Alnus (mean is 0.1%, maximum is 0.7%). These pollen assemblages represent the plant components well in the alpine meadow communities, although they are influenced slightly by long-distance pollen grain transported by wind or river (such as these arboreal pollen taxa). Together with pollen counts and percentages, we also provided the modern climatic data for the sampled lakes. The China Meteorological Forcing Dataset (CMFD; gridded near-surface meteorological dataset) with a temporal resolution of three hours and a spatial resolution of 0.1° was employed, and the climatic data of the nearest pixel of one sampled lake was defined to represent climatic conditions of the lake. Finally, the mean annual precipitation (Pann), mean annual temperature (Tann) and mean temperature of the coldest month (Mtco) and warmest month (Mtwa) are calculated for each sampled lake.
CAO Xianyong, TIAN Fang, LI Kai, NI Jian
This dataset is derived from the paper: Tang, H. et al. (2020). Early Oligocene vegetation and climate of southwestern China inferred from palynology. Palaeogeography, Palaeoclimatology, Palaeoecology, 560, 109988. doi:10.1016/j.palaeo.2020.109988 This data is part of Supplementary data of the paper, maily contains: Supplementary table 1) Pollen percentages, which were calculated using the collected pollen samples. Supplementary table 2) Plant functional types (PFTs) for the reconstructed paleovegetation of three sites : Wenshan (Early Oligocene), Jianchuan (Early Oligocene) and Lühe (Late Eocene). Recently, in the town of Lühe, central Yunnan, SW China, a new fossil-bearing section was found and dated as early Oligocene (~33–32 Ma) according to U-Pb isotope of volcanic tuff. The fossil-bearing section totals about 18 m in thickness. Fifty-five pollen samples were collected vertically throughout this Lühe town section. For each sample, 2–2.5 g of sediment were treated with KOH (10%,) HCl (10%) and HF (39%), then sample residues were sieved through a 5 μm nylon mesh in an ultrasonic tank. Spore and pollen grains were identified using both a light microscope (LM, Leica DM1000 microscope) and a scanning electronic microscope (SEM). Single grains were picked up by a capillary tube and then transferred to a copper stub, coated with gold and observed with a Zeiss EVO LS10 SEM. At least 300 pollen grains were counted for each sample under the LM at ×400 magnification. Then the pollen percentages were calculated using the sum of total terrestrial pollen. The paleovegetation was reconstructed following the method described by Prentice et al., 1996, Prentice and Jolly, 2000 and Ni et al. (2010). The paleobiomes were reconstructed by comparing the similarity of the palaeoflora with modern plant functional types (PFTs), according to the data published by Ni et al. (2010). The similarity between the palaeoflora and modern PFTs data was explored using Euclidean distances (Prentice et al., 1996) and the Jaccard Index Coefficient (Pound and Salzmann, 2017). The Jaccard Index Coefficient in the R package “clusteval” was used here to calculate the similarity. The palaeoflora was assigned to the biome with the highest similarity scores, taking into account dominant or key taxa.
TANG He
The physical and chemical index records of sediment sequence can reflect the history of sedimentary environment and climate change in the source area and surrounding areas. The multi index test and analysis of zb13-c1 borehole sediments in Zoige Basin, Eastern Qinghai Tibet Plateau were carried out, and the physical and chemical index test data since mis5 stage were obtained, including grain size, loss on ignition, XRF element analysis and C, N element content data. Borehole zb13-c1 was drilled in the sedimentary center of Zoige Basin in 2013 ° 54.72′N, 102 ° 39 ′ e, 3458 m a.s.l.), and more than 102 meters of sediments were obtained, with a total coring rate of 94%. All test data are original data, arranged in the order of corresponding depth.
ZHAO Yan
Guided by the theory of plate tectonics, paleogeography, petroliferous basin analysis and sedimentary basin dynamics, we have collected a large number of data and achievements of geological research and petroleum geology in recent years, including strata, sedimentation, paleontology, paleogeography, paleoenvironment, paleoclimate, structure, oil and gas (potash) geology and other basic materials, especially paleomagnetism, Paleogene Based on the data of detrital zircon and geochemistry, combined with the results of typical measured stratigraphic sections, the lithofacies and climate paleogeographic pattern of Cretaceous were restored and reconstructed, and two lithofacies paleogeographic maps of early and late Cretaceous of Pan tertiary and two climate paleogeographic maps of early and late Cretaceous of Pan tertiary were obtained, aiming at discussing the influence of paleogeography, paleostructure and paleoclimate In order to reveal the geological conditions and resource distribution of oil and gas formation, and provide scientific basis and technical support for China's overseas and domestic oil and gas exploration deployment.
LI Yalin
This is Northern Hemispheric (NH) annual near-surface temperature dataset during the past millennium with a 2° spatial resolution, which is produced using the paleoclimate data assimilation approach with EnSRF method, MPI-ESM-P model and 396 multi-proxies from the PAGES2k Consoritum. This dataset agrees well with several observational temperature datasets during the instrumental period, and has a similar level of reliability as the Twentieth Century Reanalysis which assimilates surface pressure observations. In addition, the dataset shows a high level of agreement with previous proxy-based reconstructions (average correlation of annual mean NH temperatures is r = 0.61). The dataset can be used to study the temperature variability over the NH and some regions of the NH during the past millennium (1000-2000 AD).
FANG Miao, LI Xin, CHEN Hans , CHEN Deliang
Here we present a record of Holocene lake hydrodynamic intensity based on the grain size of suspended lacustrine silt isolated from the sediments of Bosten Lake. The larger the size of the suspended lacustrine silt, the stronger the hydrodynamic intensity of the lake at that time, that is, the larger the inflow and outflow, the higher the water level of the lake, and vice versa. The data can be used to indicate the evolution of lake hydrodynamics since Holocene, and provide theoretical support for the study of climate, hydrology and water resources changes in the region. This method is only suitable for the analysis of lake sediments with open basin and stable sedimental environment, and it is not suitable to use this method when the sedimentary facies changes greatly.
XIE Haichao
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