Debris flow in Nanfeng area is a natural disaster phenomenon caused by the combination of many natural factors. It is affected by the terrain, geology and climate. Therefore, the formation and development of debris flow fully reflect the organic combination of various natural factors. The modern geomorphic process in Nanfeng area is very active, and the glaciation, canyon flow and slope physical and geological processes are very strong. The data analysis shows that due to the sharp rise of the ground and the strong invasion of the Yarlung Zangbo River water system, most of the gullies are V-shaped, short and steep, and the vertical gradient of the gully bed is large, about 500 ‰ in the upper reaches and about 400 ‰ on average, and 250-300 ‰ in the middle and lower reaches. This kind of steep valley terrain is easy to form debris flow under the action of turbulent current. Under the action of gravity, landslides and collapses occur continuously in the valley. According to the investigation, most of the terrain slopes favorable for the formation of debris flow in Nanfeng area are above 30 degrees, and the upper valley slope in this area can generally reach 40-50 degrees, and the maximum can reach 60-70 degrees. The middle and lower valley slopes are also between 35-40 degrees, which are favorable for the development of debris flow.
PENG Buzhuo, YANG Yichou
This data set records the statistical table of mineral resources discovered in Qinghai Province from 1998 to 2000, and the data are divided by year. The data are collected from the statistical yearbook of Qinghai Province issued by the Bureau of statistics of Qinghai Province. The data set consists of three tables, which are: statistical table of mineral resources discovered in Qinghai Province, 1998.xls; statistical table of mineral resources discovered in Qinghai Province, 1999.xls; statistical table of mineral resources discovered in Qinghai Province, 2000.xls. The data table structure is the same. For example, the data table in 1998 has three fields: Field 1: mineral category Field 2: total minerals Field 3: minerals found
Qinghai Provincial Bureau of Statistics
This data set mainly includes the whole rock SR Nd isotopic data of 83 magmatic rocks from the Hoh Xil- basin to Lhasa block in the Qinghai Tibet Plateau. The samples are mainly distributed in Hoh Xil- lake, Guoganjianian in the South Qiangtang, Dugur, Nasongduo and Saga counties in the Gangdise. Rock samples include olivine leucite, quartz monzonite, diorite and granite. The data mainly come from published articles or articles in the acceptance stage. MC-ICP-MS was used to measure SR Nd isotopes in Guangzhou Institute of geochemistry, Chinese Academy of Sciences and other key laboratories. The published articles of the data set have been included in high-level SCI or Ni journals, and the data results are true and reliable. In the future, it can be used to study the lithospheric evolution and magmatic genesis of the Qinghai Tibet Plateau.
TANG Gongjian, DAN Wei, QI Yue, WANG Jun, ZHOU Jinsheng
The EPMA data set of single mineral of magmatic rocks in the Qinghai Tibet Plateau is mainly based on the main data of single mineral in some areas of the Hoh Xil Lhasa plate, and the single mineral test points are more than 1000. The samples were distributed in Hoh Xil lake, Baohu Lake in South Qiangtang and Narusongduo area in Gangdise. Cameca sxlivefe electron microprobe was used for single mineral electron probe. The data comes from published articles or in the acceptance stage. The data were published in SCI or Ni journals, including American mineralogist and Journal of petroleum. The main testing units are Guangzhou Institute of geochemistry, Chinese Academy of Sciences and Institute of mineral resources, Chinese Academy of Geological Sciences. The data set can be used to study the petrogenesis of magmatic rocks in different areas of the Qinghai Tibet Plateau.
TANG Gongjian, QI Yue, WANG Jun, ZHOU Jinsheng
Lithofacies analysis is an important research method to explore the source region, background, and nature of sedimentary basins. Through the systematic investigation of several late Cretaceous strata in Nepal, situated on the south flank of the Himalayas, the Tulsipur and Butwal sections conducted detailed lithology and sedimentary facies analysis. Continuous strata include the Taltang Fm. , Amile Fm. , Bhainskati Fm. and Dumri Fm. from bottom to top. The lithology contains terrigenous clastic rocks such as conglomerate, sandstone, siltstone and mudstone, chemical rocks such as limestone and siliceous rock, as well as special lithology such as coal seam, carbonaceous layer and oxidation crust. Both sections have various colors and sedimentary structures, which are good materials for the analysis of lithofacies evolution. According to the characteristics of lithofacies and sedimentary assemblage revealed that the Nepal sedimentary environment evolution during the late Cretaceous, which experienced the marine, fluvial, lacustrine, and delta evolution process.
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.
Zircon HF-O data sets of magmatic rocks in the Qinghai Tibet Plateau are mainly based on zircon HF-O isotopic data of local areas from the South Qiangtang to Lhasa plate. Zircon HF-O test points are mainly concentrated in guoganjianian mountain, baohu, Duguer of South Qiangtang and saga County of Lhasa plate. The rocks are mainly mafic dyke swarms, gneissic granite and diorite. Zircon HF-O was measured by MC-ICP-MS and Sims, respectively. The data comes from published articles or in the acceptance stage. The data were published in SCI or Ni journals, including geology, BSA bulletin and Journal of petroleum, and the data results were true and reliable. The main testing unit is Guangzhou Institute of geochemistry, Chinese Academy of Sciences. The data set can be used to study the petrogenesis and lithospheric evolution of magmatic rocks in different areas of the Qinghai Tibet Plateau.
TANG Gongjian, DAN Wei, WANG Jun, QI Yue
The single mineral dating data set of magmatic rocks in the Qinghai Tibet Plateau is mainly zircon dating in some areas of the Hoh Xil Lhasa plate, with 34 zircon dating samples. The samples are mainly from baohu, guoganjianianshan and Dugur areas of South Qiangtang, Saga county and narusongduo areas of Lhasa plate. The rocks are mainly quartz monzonite, granite and diorite. The zircon dating methods include Sims and LA-ICPMS. The data comes from published articles or in the acceptance stage. The data were published in SCI or Ni journals, including geology, BSA bulletin and Journal of petroleum, and the data results were true and reliable. The main testing unit is Guangzhou Institute of geochemistry, Chinese Academy of Sciences. The data set can be used to study the age of magmatic rocks in different areas of the Qinghai Tibet Plateau.
TANG Gongjian, DAN Wei, ZHOU Jinsheng, QI Yue, WANG Jun
This data set mainly includes the non-traditional B-Mo isotopic data of Himalayan Leucogranites, which is mainly used to study the mechanism of B-Mo isotopic fractionation during the melting process, and is of great significance to the genetic study of Himalayan Leucogranites. The rocks are mainly from the granite in the Cuonadong area. Among them, there are 34 Mo samples and 48 B samples, including repeated samples. MC-ICP-MS was used for B-Mo isotopic analysis. ICP-AES and MC-ICP-MS were used for B and Mo contents in solution. The testing unit is Guangzhou Institute of geochemistry, Chinese Academy of Sciences. The data are from accepted articles published in the Journal of geochimica et cosmochimica Acta, and the data are true and reliable. It can be applied to the study of unconventional isotope fractionation and the genesis of magmatic rocks.
The data content mainly includes the main and micro data of the whole rock of some magmatic rocks in the Hoh Xil Lhasa plate of the Qinghai Tibet Plateau. The samples were mainly distributed in Hoh Xil lake, South Qiangtang guoganjianian, Dugur, and Gangdise Nasongduo and Saga counties. There are more than 300 major and trace elements in the samples, including olivine leucite, quartz monzonite, diorite and granite, which are of great significance to the study of the lithospheric evolution of the Qinghai Tibet Plateau. Data mainly come from published articles or being accepted. XRF spectroscopy was used to determine the major elements and ICP-MS was used to determine the trace elements. The data quality is highly reliable, and the testing units include the State Key Laboratory of Guangzhou Institute of geochemistry, Chinese Academy of Sciences, etc. The data are published in high-level journals, including geology, BSA bulletin and Journal of petroleum.
TANG Gongjian, WANG Jun, QI Yue, ZHOU Jinsheng, DAN Wei
This data set includes apatite and zircon (U-Th) / He ages, apatite fission-track (AFT) ages of the Yalong River thrust belt, which will be continuously updated in the future. The first part is the apatite and zircon He and apatite fission-track data from the Yunongxi fault, a branch fault in the hinterland of the Yalong River thrust belt. The second part of the data is from the Jinping Shan-Muli fault, a branch of the Yalong River thrust belt, including apatite and zircon He ages data. The data results are concentrated, which well constrain the evolution of the Yalong River thrust belt and provide a high-quality chronological basis for exploring its role in the process of plateau expansion.
The data include the Cenozoic plant fossils collected from Gansu, Qinghai and Yunnan by the Department of paleontology, School of Geological Sciences and mineral resources, Lanzhou University from 2019 to 2020. All the fossils were collected by the team members in the field and processed in the laboratory by conventional fossil restoration methods and cuticle experiment methods. The fossils are basically well preserved, some of which are horned The study of these plant fossils is helpful to understand the Cenozoic paleoenvironment, paleoclimate, paleogeographic changes and vegetation features of the eastern Qinghai Tibet Plateau.
The Yarlung Zangbo suture zone and its neighbouring areas are crucial for the research of the evolution of Neo-Tethys. The earliest evidence of the formation of Neo-Tethys remains to be discovered and the sequence of the basin evolution in many areas, such as the eastern and western Xizang, is far from well established. 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 some key areas in eastern, central, and southern Xizang, 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 in the region. This dataset is a collection of the exploration, which includes diaries and photos of the strata, geological structure, profiles, and fossils that have been collected in the above-mentioned areas. It consists of three items. The explored strata include the Jurassic-Cretaceous in Luolong and Basu counties, eastern Xizang, in Renbu and Lang counties, central Xizang, and the radiolarite strata in Ngari.
LI Jianguo, LUO Hui, LI Xianghui
Previous works have been undertaking on the geochemistry of some basic rocks within the Yaelung Zangbo suture zone, and it was proposed that the Jurassic-Cretaceous seamount type basement basic rocks are preserved in Zhongba and Renbu area. In this work, we conducted analysis of trace element for seventeen basic rock samples underlain below limestone blocks in Lhaze area within the central Yarlung Zangbo suture zone, southern Tibet. Results show that the rocks are dominated by basalts and have a feature of EMORB type with NMORB and OIB types. Combined with the overlain carbonates, these rocks are proposed the basement of paleo-seamounts, the Permian vestige preserved within the Yarlung Zangbo suture zone. This recognition of paleo-seamount implies that the Neotethys Ocean could have been already opened at the time (before the Middle Permian epoch).
With a depositional history spanning the early Aptian to early Albian (~19 mys), the Lower Cretaceous Xinminpu Group in Jiuquan, NW China provides abundant animal and plant fossils. This area is the represented study area of the Lower Cretaceous in China. The absence of a comprehensive stratigraphical framework for this area however limits the degree to which the unit can be interpreted relative to coeval sections and the geological records in genera. This investigation from July 9 to July 11 focuses on the Lower Cretaceous in this area, and collected abundant fossil and rock samples for biostratigraphic and stratigraphic analysis. This dataset includes: stratigraphic column of the Chijinpu Formation in the East Xiagou outcrop, and photographs of outcrops and represented fossils; stratigraphic column of the Xiagou Formation in the Changma outcrop and a photo of bird-bearing outcrop.
This dataset is derived from the paper: Deng, W. et al. (2020). Sharp changes in plant diversity and plant-herbivore interactions during the Eocene–Oligocene transition on the southeastern Qinghai-Tibetan Plateau. Global and Planetary Change, 194, 103293. doi:10.1016/j.gloplacha.2020.103293 This data contains herbivore damage patterns on fossil leaves of plant assemblages from the latest Eocene layer and the earliest Oligocene layer in Kajun Village, Markam County, southeastern margin of the Qinghai-Tibetan Plateau. Herbivore damage patterns on fossil leaves are essential to explore the evolution of plant-herbivore interactions under paleoenvironmental changes and to better understand the evolutionary history of terrestrial ecosystems. The Eocene–Oligocene transition (EOT) is a period of dramatic paleoclimate changes that significantly impacted global ecosystems, Researchers identified taxonomic composition of the flora, and investigated well-preserved herbivore damage on fossil leaves from two layers(the latest Eocene layer (MK-3, ~34.6 Ma) and the earliest Oligocene layer (MK-1, ~33.4 Ma)) of the Lawula Formation in Markam County, southeastern Qinghai-Tibetan Plateau (QTP), China. The data contains tables of the records of the leaves fossil, the fileds of the tables are as following: Basic Code; Database RFID; Family code; Genera code; Species code; Marks; Plant-herbivore; Leaves for damage; FFGs & DTs; Code marks; Hole feeding; Margin feeding; Skeletonization; Surface feeding; Piercing & Sucking; Oviposition; Mining; Galling; Fungal; Incertae Sedis; Boring; Undefined This dataset also contains some figures in the article.
DENG Weiyudong, SU Tao
The Sixth Zhabuye Section locates at the northern part of the Zhabuye salt lake in Zhongba County, Tibet. The Middle Permian carbonates of the Xiala Formation outcropped very well in the region. This section has a thickness of 200 meters and was divided into 6 units. The lower 50 meters of the section is composed of limestones and chert layers. The chert layers in the above 100 meters decreased significantly, but they reappear in the top 35 meters. This section has abundant fusulines and smaller foraminifers. The fusulines has two assemblages, respectively Neoschwagerina majulensis-Kahlerina pachytheca assemblage in the lower and Chusenella quasifera-Codonofusiella nana assemblage in the upper. The foraminifers are divided into three assemblages, respectively Glomomidiellopsis specialisaeformis-Pachyphloia multiseptata assemblage, Lysites biconcavus-Shanita amosi assemblage and Lasiodiscus tenuis-Neoendothyra reicheli assemblage.
The Xiadong section locates at the Xiadong village region in Tsochen County, Tibet. The Permian strata in this region includes Largar, Angjie and Xiala formations. The Xiadong Section locates at the north of the Xiadong Village. The section is composed of entirely carbonates with abundant fusulines, smaller foraminifers and corals. The column exhibit the occurrences of fusulines and smaller foraminifers and their biostratigraphy. According to the fusulines, the age of the Xiala Formation at this section is middle Permian age. The fusulines can be subdivided into two assemblages, respectively Chenella changanchiaoensis-Neoschwagerina cheni in the lower and Nankinella-Chusenella assemblage in the upper. The foraminifers are divided into four assemblages, respectively Lasiodiscus tenuis-Palaeotextularia angusta elongata assemblage, Agathammina pusilla-A.vachardi assemblage, Hemigordiopsis-Midiella assemblage and Pachyphloi-Nodosinelloides assemblage.
The Mujiucuo section locates at the west of the Mujiucuo salt lake in Xainza County, Tibet. The Permian sequences oupcropped very well at the section. The Permian sequence at the section was divided into five formations, respectively Yunzhub, Largar, Angjie, Xiala and Mujiucuo formations. The Yunzhub Formation is composed of sandstone. The upper part of this formation contains limestone interlayers with 8 species of brachiopods. The brachiopods are grouped into the Costatumulus-Bandoproductus assemblage. The Xiala Formation is composed of entirely carbonates. The purplish limestone in the base of Xiala Formation consists of 6 species of brachiopods. They are grouped into the Alispiriferella-Retimarginifera celeteria assemblage. The overlying bed only contains one species Permophricodothyris elegantula. The brachiopods from these beds overall show a Gondwanan type in palaeobiogeography. It suggests that the Lhasa Block located not far away from the Gondwana margin. According to the constraints by fusulines and conodonts, the ages of beds 83, 86 and 87 are Middle Permian whereas those of beds 88 and 89 are late Permian. Brachiopods are found in many beds in the Xiala Formation. They are divided into two separate assemblages, respectively Echinauris opuntia-Neoplicatifera in the lower and Spinomarginifera lopingensis-Chonetinella cymatilis in the upper. Compared with the brachiopods from the Yunzhub Formation and basal Xiala Formation below, both assemblages from the middle and upper part of the Xiala Formation exhibit a pronounced palaeobiogeographical changes.
XU Haipeng, ZHANG Yichun
The Mujiucuo section locates at the west of the Mujiucuo salt lake in Xainza County, Tibet. The Permian sequences oupcropped very well at the section. The beds from 83 to 89 consists mainly of bioclastic limestone with abundant fusulines and foraminifers. After careful examination, 13 species of fusulines and 37 species of smaller foraminifers are identified at the section. In terms of the occurrences of those fusulines and smaller foraminifers, the fusulines are subdivided into the lower Nankinella-Chusenella assemblage of Middle Permian and upper Codonofusiella schubertelloides zone of Late Permian. Similarly, the smaller foraminifers are also divided into lower Agathammina vachardi-Hemigordiopsis subglobosa assemblage and upper Glomomidiellopsis xainzaensis-Midiella reicheli assemblage. The dominance of Miliolinids in the section suggests an overall warm-water depositional settings.