The Late Paleozoic carbonate strata are well developed from Lewuqi County to Jiangda County in the Changdu area, eastern Xizang. The previous biostratigraphic studies based on macro-fossils (e.g. brachiopod and coral) are not sufficient for high resolution correlation. The seemingly continuous strata at Tuoba and Wuqingna have been divided as Zhuogedong Formation (or Qiangge Formation) of Late Devonian and Wuqingna Formation of Early Carboniferous mainly by lithology. We made detailed sampling for conodont, sedimentary and geochemical research at the outcrops between Tuoba and Wuqingna near Nuoma Village which according to the unpublished data belong to the Devonian-Carboniferous boundary interval. This study is significant for high resolution correlation of Late Devonian and Early Carboniferous in this region and the global stratotype study. The dataset only includes the stratigraphic column and photo of the section. The bio-chronological information will be added in the future.
WANG Qiulai
The Yarlung Zangbo suture zone and its neighbouring areas are key to the research of the evolution of Neo-Tethys. The sedimentary sequence as evidence of the evolution of Neo-Tethys remains unclear in many areas, particularly in the western and northern Xizang. The limits in stratigraphy and sedimentology have greatly restricted the investigation of the evolution of Neo-Tethys as well as the collision between Indian-Eurasian plates. This exploration team conducted a joint investigation on the Mesozoic strata in this area, with emphasis on their stratigraphy, palaeontology, and sedimentology, to retrieve potential stratigraphic and sedimentary evidence of the opening, evolution, and retreat of the Neo-Tethys. This dataset records the work of the expedition team in Xigaze, Ngari and Nagqu of Xizang. It consists of four parts, each part includes diaries and photos of the strata, geological structure, profiles, and fossils that have been collected by a special expedition group. The explored strata encompass the Cretaceous and Paleogene and the radiolarite strata in the above mentioned areas.
LI Jianguo, LUO Hui, HUANG Diying, LI Xin
We have studied the Petrotectonic attributes of granites distributed in a large area in the North Lancangjiang structure in Bitu area. The major and trace elements and Sr Nd isotopes have been completed in the Key Laboratory of deposit geochemistry, Institute of geochemistry, Chinese Academy of Sciences. Among them, the main elements are analyzed by pw4400 X-ray fluorescence instrument, and the contents of 10 element oxides are determined; Trace elements are tested by ICP-MS inductively coupled plasma mass spectrometer. ICP-MS is manufactured by Agilent company in Tokyo, Japan, and the model is Agilent 7700x. The analysis method is the same as that of Zhang Xin, etc. According to the analysis results of standard sample gbpc-1de, the analysis error is less than 5%. MC-ICP-MS double focusing magnetic mass spectrometer with Neptune plus model is used for isotope test experiment. The test basis is GB / T 17672-1999.
WANG Shifeng
Based on the collection of GPS and stress data of the Qinghai Tibet Plateau, this paper combs the movement rate and stress deformation system of the Qinghai Tibet Plateau, displays the direction and size of each point through MAPGIS software, and then superimposes it on several main tectonic units of Songpan Ganzi flysch belt, North Qiangtang Changdu Simao plate, South Qiangtang Baoshan block and Gangdise Lhasa block. This paper tries to reflect the similarities and differences of the specific deformation modes of each block under the overall stress of the Qinghai Tibet Plateau, and further define the specific deformation style and deformation state of each local area. This is of great significance for a deep understanding of the Cenozoic deformation model of the Qinghai Tibet Plateau, as well as for guiding local disaster prevention and relief and engineering construction.
WANG Shifeng
Qiangtang Basin is located between the Hoh Xil-Jinsha River tectonic belt and the Bangong-Nu River tectonic belt, is an important petroleum-bearing basin in the Qinghai-Tibet region of China. The basin has multiple sets of source rocks developed in the Mesozoic. The Triassic strata are widely distributed in the basin. Among them, the Upper Triassic has a large thickness and is considered as an important source rock, however, there is still a lack of understanding of its distribution, hydrocarbon generation potential, and major controlling factors. In this paper, the Upper Triassic source rocks in the Qiangtang Basin were studied, and the key samples were taken in the Quemo Co area of the Northern Qiangtang Basin, which was less studied previously. The source rocks were evaluated based on the geochemical characteristics of the samples, and the provenance input and depositional environment of the source rocks were analyzed according to the characteristics of their biomarkers. Combining the results of previous studies on the source rocks of the Upper Triassic Xiaochaka Formation in the Qiangtang Basin, the distribution characteristics, hydrocarbon generation potential, and the controlling factors of the source rocks of the Upper Triassic in the Qiangtang Basin were studied. The analysis results of the samples of the Upper Triassic Bolila Formation and the Bagong Formation source rocks collected in the Quemo Co area of the Northern Qiangtang Basin indicate that the TOC range of the Bolila Formation limestone is 0.03%~0.53% with an average of 0.20%, and the TOC range of the Bagong Formation mudstone is 0.57%~1.78% with an average of 1.04%. Both have reached the effective source rock grade, The source rocks of the Bolila formation reaches the level of medium source rock grade, and the organic matter abundance of the source rocks of the Bagong Formation is higher than that of the Bolila Formation and reach the medium-good source rock grade. The organic matter types of the source rocks are type II 1 , and the Tmax of the organic matter are all higher than 455°C, R O of all samples are 1.3% to 2.0%, the organic matter maturity achieve high mature stage. The organic matter of the source rocks is both the marine aquatic organism and the terrestrial plant, which is a mixed source. The source rocks sedimentary environment should be a reducing environment. The salinity of water body may be the salt water environment. Combining with previous research results, the authors evaluated the source rocks of the Upper Triassic Xiaochaka Formation in the Qiangtang Basin. The organic matter abundance of the argillaceous source rocks can basically reach the medium-good source rock level, carbonate source rocks organic matter abundance basically reach the poor source rock level. The types of the organic matter in carbonate source rocks are mainly Type II 1 and individually Type I. The organic matter types of the argillaceous source rocks are Type II 2 and Type III, and a small amount of the Type II 1 source rocks. The maturity of the source rocks is generally high-mature and over-mature stage, with only a few areas showing mature stage. The argillaceous source rocks are distributed in the Tumen-Sewa area, Zaxiahe-Ganggairi and Woruo Moutain-Geladandong area in the North and South Qiangtang Depression. Carbonate source rocks are mainly distributed in the South Qiangtang Depression. Affected by the regional tectonic movements, the main source rock beds in the Qiangtang Basin have undergone two oil and gas generation processes during the burial process. The Upper Triassic Xiaochaka Formation entered the hydrocarbon generation threshold in in the late Lower Jurassic to early Middle Jurassic and entered the first oil generation period. The basin experienced the last period of intense deformation and shrinkage in the Late Oligocene-Early Miocene and entered the second hydrocarbon generation period.
HAN Zhongpeng
On the basis of satellite image recognition, this data set catalogues and photographs the debris flow disaster chain and landslide disaster chain observed in the Himalayas and its surrounding areas; And fill in the data form, scientific examination log file and distribution map. Discipline scope of this data set: information and system science related engineering and technology - > systematic application of information technology - > geographic information system. This data mainly determines the location and type of disaster and disaster chain through field investigation, and then arranges it into tables and generates original data such as vector data and scientific research logs. The field scientific research areas include Nyingchi, Shannan, Bomi, Basu, Shigatse, Ali and other areas of the Tibet Autonomous Region, and the South-North rift areas such as Yadong, Nyalam, Chentang village, Jilong and Pulan of the South Asia channel.
DENG Hongyan
Based on the research progress of strata, rocks and structures in Sanjiang area, especially the systematic study of Jinshajiang suture zone, Bitu suture zone and Bangonghu Nujiang suture zone, this area is divided into several main structural units: Songpan Ganzi flysch zone, North Qiangtang Changdu Simao plate, South Qiangtang Baoshan block and Gangdise Lhasa block; On this basis, Songpan Ganzi block is further divided into three sub units: Bayankala block, Ganzi Litang lake basin system and Zhongzan block; The North Qiangtang Changdu Simao plate is subdivided into five units: Jinshajiang paleoTethys belt, Changdu terrane, Lanping Simao terrane, Lincang volcanic rock belt and Bitu paleoTethys belt; The Nanqiangtang Baoshan tectonic system is subdivided into three tectonic units: Nanqiangtang block, Baoshan block and Bangong Lake Nujiang middle Tethys belt.
WANG Shifeng
The Cenozoic strata developed within and around the Tibetan Plateau, contain fruitful information on the tectonic evolution, paleoenvironment and paleoclimate changes. It's very significant on revealing the history of the uplift and deformation of the Tibetan Plateau and its relevant effects on the regional and even global environment and climate. This data set contains several well developed sections, which have been identified by the systematic geological survey. Depending on the tools (e.g. GPS, geological compass) in the fieldwork, we have finished the geological measurements and descriptions of these sections as well as the relevant geological maps. It includes a 90-m loess deposit of the Duikang section in the Linxia basin, several fluvial and lacustrine deposits (such as the 1890-m Dayu section in the Lunpola basin, the 300-m Shuanghe section in the Jianchuan basin, the 252-m Caijiachong section in the Qujing basin) and a 932-m saline lacustrine deposit with gypsolyte of the Jiangcheng section in the Simao basin. This data set provides a solid geological foundation for the following researches on stratigraphic chronology, tectonic evolution, paleoenvironment and paleoclimate, and so forth.
FANG Xiaomin , FANG Xiaomin, YAN Maodu, ZHANG Weilin, ZHANG Dawen
The Wuyu Basin is bounded by the Gangdese Mountains to the north and the Yarlung Tsangpo River to the south, and is a representative basin to study the Cenozoic tectonism of the southern Tibet. The sedimentary strata in the Wuyu Basin include the Paleocene-Eocene Linzizong Group volcanics and the Oligocene Rigongla Formation (Fm.) volcanics, the Miocene lacustrine sediments of the Mangxiang Fm. and Laiqing Fm. volcanics, the late Miocene-Pliocene Wuyu Fm., and the Pleistocene Dazi Fm. Five sandstone samples from the Mangxiang Fm., Wuyu Fm. and Dazi Fm. and one modern Wuyu reiver sand sample were collected for detrital zircon U-Pb dating using the LA-ICP-MS method. Detrital zircon U-Pb ages in the Mangxiang Fm. show a large cluster at 45-80 Ma; those in the Wuyu Fm. show a large cluster at 8-15 Ma and a subsidiary cluster at 45-70 Ma; those in the Dazi Fm. show three large clusters at 45-65 Ma, 105-150 Ma and 167-238 Ma; and those in modern Wuyu river show a large cluster at 8-15 Ma and a subsidiary cluster at 45-65 Ma (Figure 1). Late Cretaceous-early Eocene zircons in all samples are consistent with the most prominent stage of magmatism of the Gangdese Mountains; the 8-15 Ma zircons in the Wuyu Fm. and modern Wuyu river are consistent with the magmatism of the Laiqing Fm.; and the Triassic-Jurassic zircons in the Dazi Fm. are consistent with the magmatism of the central Lhasa terrane. The results of detrital zircon U-Pb ages and sedimentary facies analyses in the Wuyu Basin indicate that the southern Tibetan Plateau suffered multi-stage tectonism-magmatism since the India-Asia collision: (1) Paleogene Linzizong Group-Rigongla Fm. volcanics; (2) tectonism-magmatism at ~15 Ma ended the lacustrine sediments of the Mangxiang Fm. and resulted in volcanism of the Laiqing Fm.; (3) tectonism at ~8 Ma resulted in the volcanic rocks of the Laiqing Fm. becoming one of the main provenances for the overlying Wuyu Fm.; (4) the Wuyu Basin formed braided river and received sediments from the central Lhasa terrane to its north at ~2.5 Ma. The geomorphic pattern of the southern Tibet has gradually formed since the Quaternary.
MENG Qingquan MENG Qingquan
In South China, standard Carboniferous δ13Ccarb curves have been established, but the isotopic patterns and values in different sections and regions can be quite different. Before the use of δ13Ccarb records to reveal global marine carbon cycling, it is necessary to conduct sedimentary facies and diagenesis analyses and compare numerous isotopic records on a global scale, in order to learn the global versus local contribution in a δ13C record. 201 geochemical samples were collected from the Yueyahu Formation for carbon and oxygen isotopic analyses, in order to reveal carbon cycling process(the TICE event) in northern Qiangtang/or Songpan-Ganzi and evaluate alternation of carbon isotopic records during diagenesis. This dataset includes 201 carbon and oxygen isotopic records.
CHEN Jitao
The data includes natural remanence, thermal demagnetization and magnetic susceptibility anisotropy of paleomagnetic samples in altash section in Southwest Tarim. The data is mainly used for magnetic stratigraphy in altash section. Combined with the results of isotopic dating, the chronological framework of altash section is established according to the records of geomagnetic polarity reversal in rocks or sediments and the comparison with standard polarity columns. From 2020 to 2021, members of the research group mainly used drilling rigs to drill paleomagnetic directional samples on the profile at an interval of 1 m (back to the laboratory to be processed into a 2 cm cylinder), and collected directional hand samples in individual areas (back to the laboratory to be processed into a 2 cm * 2 cm * 2 cm cube). The paleomagnetic experimental testing instrument includes two parts: 1 Rock superconducting magnetometer is used to measure the remanence and rock magnetic parameters of paleomagnetic samples; 2. Mfk kappa bridge is used to measure the magnetic susceptibility and magnetic susceptibility anisotropy of geological samples. A total of 298 samples were selected at an interval of 10 m, of which 221 obtained stable remanence, with a success rate of 74%. According to the preliminary paleomagnetic results, the chronological framework of altash section in Southwest Tarim is established; After all the paleomagnetic results are tested, combined with the accurate isotopic age, the high-precision magnetic stratigraphic sequence in Southwest Tarim will be established.
ZHENG Hongbo
The data are the detrital zircon ages of the late Cretaceous early Cenozoic strata in Sichuan Basin, Xichang Basin, Huili basin and Chuxiong Basin on the eastern margin of the Qinghai Tibet Plateau; All detrital zircon samples collected in this study are sandstone. The crushing and zircon selection of samples were completed in Langfang Chengxin Geological Service Co., Ltd; Zircon U-Pb dating was done at the State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration using laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). At least 200 zircon grains were randomly selected to adhere to double-sided adhesive, and were poured into the laser sample target with epoxy resin. All samples were ablated by using a laser beam with a diameter of 28μm, a frequency of 10 Hz and laser energy density of 4.0J/cm 2 .
ZHANG Huiping
This data set includes major and trace elements and zircon U-Pb isotope data of Mesozoic sedimentary rocks in Baoshan block, Tengchong, Yunnan Province. The sampling time is 2018, and the area is near lameng Town, Baoshan District, Tengchong, Yunnan. The rock samples include 8 sedimentary rock samples. This data provides key information for understanding the evolution of the middle Tethys structure between Tengchong and Baoshan, and limits the closing time of the middle Tethys ocean to the late Jurassic, which is of great significance for discussing the evolution process of the Tethys structure. The whole rock major and trace elements of rock samples were tested by fluorescence spectrometer (XRF) and plasma mass spectrometer (ICP-MS), and zircon U-Pb was dated by laser ablation plasma mass spectrometer (LA-ICP-MS). The testing units include Institute of Geology and Geophysics, Chinese Academy of Sciences and Institute of Qinghai Tibet Plateau. The related articles of this data set have been published in the Journal of Asian Earth Sciences, and the data results are true and reliable.
ZHANG Jiuyuan
Carbon cycle is controlled by relative changes in carbon fluxes of global atmosphere, hydrosphere, lithosphere, and biosphere. During the geological history, carbon isotope excursions usually occur in the critical period. Carbon isotope positive excursions are recognized to be related to abundant organic burial or enhanced primary productivity. Ordovician δ13Ccarb curves from China have been established, but the isotopic patterns in different sections and regions can be quite different. Before the use of δ13Ccarb records to facilitate high resolution correlation, it is necessary to conduct sedimentary facies and diagenesis analyses and compare numerous isotopic records on a global scale, in order to learn the global versus local contribution in a δ13C record. 100 geochemical samples were collected from the Dapingian Tha Manao Formation for carbon and oxygen isotopic analyses, in order to reveal carbon cycling process in northern margin of Gondwana continent and alternation of carbon isotopic records during diagenesis. This dataset includes 100 carbon and oxygen isotopic records.
LI Wenjie , CHEN Zhongyang, LI Chao , FANG Xiang
In March of 2019, scientists from Nanjing Institute of Geology and Palaeontology, CAS and Comsats University Islambad in Pakistan have a joint research in the stratigraphy in the Salt Range of Pakistan. The research goal is to reveal the Late Permian strata and faunas in the northern Tethys Himalaya region and their relationships with that of Southern Tibet. The investigated sections were done by rulers in the fieldwork and the foraminifer samples were sampled in high resolution. Totally, two sections were measured in the Zaluch Nala region, respectively Zluch Nala A and B sections. Both sections are located at the northeast of Mianwali city in Salt Range, Pakistan. This section contains the strata of the Amb, Wargal and Chhidru formations. In the Zaluch Nala A section, the strata are composed of the upper part of the Wargal Formation (Kalabagh member) and the Chhidru Formation. The Zaluch Nala B section is structurally below the A section. The topmost part of the Zaluch Nala B section may probably correlate with the basal part of the Zaluch Nala A section. The Zaluch Nala B section is composed of lower part of the Wargal Formation and the Amb Formation. The Amb Formation is dominated by calcareous limestone. The only fusuline species Monodiexodina kattaensis indicates a Middle Permian age for this formation. The lower part of the Wargal Formation is dominated by middle and thin bedded limestone. The species of Pseudocolaniella occurs in the lower part of the Wargal Formation indicates a Late Permian age. The upper part of the Wargal Formation (in the A section) is dominated by nodular limestone, namely the Kalabagh member. The overlying Chhidru Formation is dominated by limestone and sandstone beds. The foraminifers from these formations consist of Reichelina, Codonofusiella and Reichelina. They suggest also a Late Permian age.
ZHANG Yichun
The Cuonadong gneiss dome, a newly discovered dome in the North Himalaya Gneiss Domes (NHGD) belt, iscomposedofthreeparts: core, mantle, andouterlayer. Theyarecomposedof Cambrian granitic gneiss, Early Paleozoic mica schist and skarn marble, and metamorphic sedimentary rocks, respectively, andleucogranitesandscores ofpegmatite veinsintrudeintothecore ofthe Cuonadong gneiss domeatalater stage. The Xianglin Be-Sn polymetallic ore depositislocatedin the northern Cuonadong gneiss dome. Anumber of north-south and east-north extensionalfaults are developedinthe mining area. The Be-Sn polymetallic orebodies were newly discovered through systematic surface exploration engineering in the mantle layer around the core of the dome and fault fracture zones. Theanatomy ofatypical mining areain the northern Cuonadong dome shows four types of ore bodies: skarn, cassiterite-quartz vein, cassiterite-sulfide, and granite pegmatite. Skarn type ore bodies occur in skarn marble in the mantle; mineralization is dominated by Sn, Be and W; Sn ore gradeis relatively low. Cassite-quartz vein type ore bodies are controlled by NE extensional fracture; mineralization is dominatedby Sn, Beand W; oregrades are relatively high. Cassite-sulfide orebodies are controlled by the interlayers lipstructure in marble; Snore gradeis high but Beand W ore grades arelow. Mineralization in pegmatiteis mainly Be, accompanied by Rb. Verified at great borehole depth, we found the deep extension of all types of ore bodies except pegmatite is relatively stable. Based on the study of there lationship between magma and Be-Sn polymetallic mineralization, we reveal that there are two stages of mineralization in the Xianglin mining area, and the mineralization is closely related to the weakly oriented two-mica granite and muscovite granite. Based on orebody characterization we developed a ore prospecting strategy. The main targets infuture ore exploration will be cassite-sulfide and cassite-quartz vein type ores as they are relatively rich in Be, Sn and W.
ZHANG Linkui
The Paleogene marine strata in southern Tibet are well developed and rich in foraminifera and other marine fossils. Based on the study of macroforaminifera taxonomy and Stratigraphy in the West Tethys domain (mainly the Mediterranean region), western scholars established the Paleocene Eocene macroforaminifera biostratigraphy in 1998. Compared with Tibet in the East Tethys domain, the development of macroforaminifera in the Paleocene in the Mediterranean region is relatively poor. Therefore, the accuracy of biostratigraphy based on sittis foraminifera is low. In this study, detailed profile survey and high-density sample collection of lower Paleogene carbonate sedimentary strata in guru area, southern Tibet are carried out to supplement and improve the biostratigraphy of macroforaminifera in southern Tibet on the basis of macroforaminiferal taxonomy research; Based on biostratigraphy and carbon isotope stratigraphy, a high-resolution chronostratigraphic framework is established. A total of 7 profiles were measured in this study, and the profiles are located between 89 ° 11 ′ ~ 89 ° 13 ′ E and 28 ° 3 ′ ~ 28 ° 7 ′ n; The elevation range is 4643 ~ 5380 M. Based on the observation of rock slices in the laboratory, the age of the measured strata is preliminarily judged. P2 section is a limestone sequence overlying the late Cretaceous strata, representing the earliest Paleocene sedimentation in the study area; P1 section is a set of very thick limestone deposits of lower Paleocene; Section E2 is the top of Paleocene, close to the Paleocene / Eocene boundary; The ages of sections E1, E3, E3s and E4 are roughly early Eocene; The grayish green marl and red shale at the top of section E4 represent the latest marine strata in the study area. We plan to conduct detailed taxonomic and stratigraphic studies on foraminifera in these sections to establish high-resolution large foraminifera biostratigraphy; At the same time, we also need to analyze the changes in composition and abundance of macroforaminifera, and further explore the evolution process of macroforaminifera in early Paleogene. For the sandstone strata in the section, we need to conduct detrital zircon U-Pb isotope analysis, the obtained age and biostratigraphic data confirm each other, and further explore the paleogeographic evolution process under the influence of India Eurasia collision.
ZHANG Qinghai
Paleozoic strata are well developed in the western Thailand area, but the detailed palaeontological research is still lacking for the Ordovician in study area. Abundant conodonts and cephalopod samples from the Tha Manao Formation in western Thailand (Sibumasu terrane, Dapingian Wat Mong Kratae section, GPS coordinates: 14°25′57″ N, 99°7′23″) were collected and identified in this study, constraining the age of Dapingian, and correlating to the Hunghuayuan Formation of South China. This dataset includes the stratigraphic column of the Tha Manao Formation section and outcrop photos in the western Thailand.
CHEN Zhongyang, LI Wenjie , LI Chao , FANG Xiang
The data mainly include the study of typical porphyry deposits, skarn deposits, magmatic deposits and pegmatite deposits in Kunlun mountain area. Porphyry deposits, focus on determining the deep process and front response of mineralization, and then clarify the genetic model and metallogenic law; Skarn type deposit, focusing on the relationship between the migration and evolution of hydrothermal fluid and mineralization; Copper nickel sulfide deposit, focusing on finding out the location and mode of magma assimilation and contamination of the crust, and then revealing the melting and dissociation process of sulfide; Pegmatite type deposits focus on the migration behavior of elements in the process of magmatic hydrothermal transformation, and then reveal the enrichment mechanism of rare metals such as Li, be, Nb and Ta in pegmatites. The experimental data obtained this time is mainly through the collection of field scientific research samples, and the elements, isotopes and chronology of the collected ore and rock samples in summer hamu, kendecok, Dahongliutan and other mining areas. The preliminary research processing results show that the data quality is high.
YUAN Feng
The single mineral EPMA data set of magmatic rocks in the Himalayan orogenic belt is mainly based on the main data of single minerals in Jilong area, and the test points of single minerals are more than 200. The rock is light colored granite. The single minerals tested are mainly feldspar, garnet, muscovite and biotite. The single mineral electron probe uses cameca sxvivefe electron microprobe, etc. The data has not been published, and the data results are true and reliable. The testing units are mainly the Institute of geology, Chinese Academy of Geological Sciences and the Institute of mineral resources, Chinese Academy of Geological Sciences. The data set can be used to study the petrogenesis of leucogranite melts in the Himalayan orogenic belt.
ZENG Lingsen , GAO Lie , YAN Lilong
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