This data set is a geochronological data set of granites in the Hengduan Mountain area, where granites are frequently intrusive and widely distributed, dating from the Precambrian Jinning period to the Cenozoic Himalayan Period. From east to west, there are four rock belts, namely, kangdian ancient land, Ailaoshan-Jinshajiang, Lincang - Zuogong and Luxi - Tengchong, which are gradually changing from old to new. The e study on the geological age of granitoids in the above rock belts mainly adopts potassium-argon dilution method and whole-rock rivet-strontium isochron age determination for some rock masses. The original data of this data set is digitized from the book Granites Geochemistry in Hengduan Mountains. This data set provides data for the study of granite age in Hengduan Mountains and has reference value for the study of related fields.
ZHANG Yuquan , XIE Yingwen
This dataset is a dataset of chemical composition of granites in Hengduan Mountains. It is of great significance to study the elemental composition and geochemical characteristics of granites, which is of great significance for exploring the genetic evolution, material origin and mineralization of granites. The data set includes the composition, distribution and content data of many major elements and trace elements, as well as the changes in the chemical composition of granites in different ages. The 21 trace elements in the granites in this study area were quantitatively analyzed by flameless atomic absorption method, polarography, spectrophotometric method, spectroscopic quantitative method, atomic absorption method and other methods. This dataset has in-depth research on the types, average signals and average contents of granite-like elements, which can be used as a good reference.
ZHANG Yuquan , XIE Yingwen
This data set is a geochemical data set of granitoids in hengduan Mountain area. The total amount and components of rare earth elements in the kangdian paleocontinent, Ailaoshan-Jinshajiang, Lincang-Zuo Gong and Luxi-Tengchong granite belts in Hengduan Mountain area are studied. The ree abundance, variation and distribution patterns of various rocks are discussed, and the genetic types of granites are preliminarily discussed. Isotope geochemistry study, using strontium and neodymium isotope system tracing method, it is helpful to understand the genesis and material source of granitoids. For this reason, the isotopic compositions of strontium and neodymium in the granitoids of the four rock belts, including diorite, granodiorite, porphyritic biotite monzonite, potassic feldspar granite, alkali feldspar granite, hornblende biotite monzonite porphyry and alkali feldspar syenite, have been studied. It is helpful to study the geochemical related aspects of granites.
ZHANG Yuquan , XIE Yingwen
The establishment and improvement of the chronological framework of the Cenozoic strata within and around the Tibetan Plateau, are very essential and significant for revealing the history of the collision, uplift and deformation of the Tibetan Plateau. It's vital to enhance the understanding of the denudation and weathering patterns varying with time and space and find out the mechanism 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 has improved or established the chronological framework of the Cenozoic strata within and around the Tibetan Plateau, based on the magnetostratigraphy and accompanied by zircon U-Pb geochronology of the volcanics/tuffs/sedimentary tuffs or detrital rocks and/or biostratigraphy. The precisely dated sedimentary sequences include a 90-m loess sequence of the Duikang section constrained as ~8.1-3.7 Ma in the Linxia basin, several fluvial and lacustrine sequences (such as the 1890-m Dayu section with a range of ~41.8-21.5 Ma in age in the Lunpola basin, the 300-m Shuanghe section dated as ~42.7-36 Ma in the Jianchuan basin, the 252-m Caijiachong section with a range of ~47-36 Ma in the Qujing basin) and a 932-m saline lacustrine sequence with gypsolyte of the Jiangcheng section in the Simao basin whose age has identified to >112-63 Ma. All relevant experiments of the above chronology results have been conducted in the Institute of Tibetan Plateau Research, Chinese Academy Sciences, Lanzhou University, Tübingen University (Germany) , University of Texas at Austin (USA). The thermal demagnetization has been implemented using a thermal demagnetization oven and measured by a cryogenic magnetometer in a magnetically shielded room. The zircon U-Pb dating has been carried out using an inductively coupled plasma mass spectrometer with an attached laser ablation system. This data set provides an important chronological foundation for the following researches on tectonic evolution, paleoenvironment and paleoclimate. It has created a series of original theoretical achievements with widespread influence.
FANG Xiaomin , FANG Xiaomin, YAN Maodu, ZHANG Weilin, ZHANG Dawen
The Ediacaran to early Cambrian representing the transition of Cryptozoic to Phanerozoic is one of the most important transitional periods in the earth system evolution and a hot period for the study of the origin and evolution of metazoan. Focusing on this scientific question, massive interdisciplinary studies including palaeontology, stratigraphy, geochemistry, geophysics etc. have been taken in many regions which significantly improve our understandings of this period. In the Himalaya zone, the correlative strata only have been reported and studies in a few regions in the Sub Indian Continent. The North Pakistan locating the western Himalaya is one of the adjoining areas of Tibet Plateau. For the lack of basic stratigraphic and palaeontological studies, it’s hard to confirm the exact age of the Neoproterozoic to early Cambrian strata assigned by the previous studies. Thus, for the establishment of the chronological framework in western Himalaya, it’s necessary to do more detailed investigations and sample collections to sort out the sedimentary sequence, biostratigraphy and chemostratigraphy of this interval in North Pakistan. During the expeditions in the Hazara Basin, we detailedly observed the lithostratigraphy and systematically collected samples for petrological, palaeontological and geochemical studies at Sikhar Mountain, Tarnawai Village, Salhad Village, Abbottabad Height, Sobangali, Neelor Village and Pindkhan Khel sections. The result of this preliminary investigation confirmed that the Hazara Basin deposited a relatively successive Ediacaran to early Cambrian strata.
PAN Bing
The samples in this data set are mainly collected from 2013-2019 and sporadic river sediment samples from 2001-2013. The data set contains the sampling location information of 40 main stem samples and 107 tributary samples, petrographic data of 62 river sediment samples, heavy-mineral data of 145 river sediment samples, and geochemical data of 55 samples. The petrographic data were collected with Gazzi-Dickinson method with grain size window at 63-2000 μm. The heavy minerals are separated from 32-500 μm sediment with the heavy liquid (2.90 g/cm3) and liquid Nitrogen, and then counted the heavy minerals depend on the mineral's optical properties and Raman spectroscopy. The geochemical analysis were tested for sediment < 2000 μm. The data of petrography and heavy minerals were collected in the laboratories of University of Milan-Bicocca and Nanjing University, respectively. The geochemical data were completed by the Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences. All the results are true and reliable. This data set systematically reflects the sediment compositions of different tributaries and different tectonic domains (Tethys Himalayan terrane, Yarlung Tsangpo suture zone, Lhasa Block, etc.) in the Yarlung Tsangpo drainage. With the high-resolution compositional dataset, the distribution characteristics of modern sediment derived from different lithology/rivers in the Southern Tibet can be obtained, which also provide the reference for deep time provenance comparison. Meanwhile, combined with the forward mixing model, we can calculate that the Lhasa Block contributes ~80% of the sandy sediments to the Yarlung Tsangpo drainage, which can be up to 5 times higher than the contribution of the Tethys Himalaya, whereas the sediment contribution from the Yarlung Tsangpo suture zone is only less than 5%.
LIANG Wendong , HU Xiumian, YAO Wensheng
This data set is in-situ HF-O isotope data of zircon from Cretaceous granite in aliqiu area of South Pamir Plateau. The sample types analyzed include biotite granite and granodiorite. Zircon HF-O test is analyzed by cameca IMS 1280hr secondary ion mass spectrometry (SIMS). The test unit is the State Key Laboratory of isotope geochemistry, Guangzhou Institute of geochemistry, Chinese Academy of Sciences. The internal precision of single analysis of 18O / 16O ratio is generally better than 0.2 ‰ (1 σ)。 The repeatability of Penglai standard data is 10.0 ‰, and the repeatability of external standard data is 10.0 ‰. The data comes from the articles under review. The data set can be used to study the petrogenesis and tectonic setting of magmatic rocks in Pamir Plateau.
TANG Gongjian, DAN Wei
The data set mainly includes the non-traditional B-Mo isotopic data of zhengga granite in Luobusa Town, qusong County, Shannan City, southern Tibet and Sailipu potassic rock in yare Township, Geji County, Ali Region. The data is mainly used to study the B-Mo isotopic fractionation mechanism during magmatic evolution and the recycling of crustal materials in the Indian Continent, which is of great significance for tracing the genesis of magmatic rocks and the crust mantle reaction in the collision zone. The rocks mainly come from granite and potassic rocks in SANGRI and Sailipu areas in southern Tibet. Among them, there are 19 Mo test samples and 24 B test samples, excluding repeated sample testing. MC-ICP-MS is used for B-Mo isotope analysis, and ICP-AES and MC-ICP-MS are used for B and Mo contents of solution respectively. The testing unit is Guangzhou Institute of geochemistry, Chinese Academy of Sciences. The data comes from the articles not received, and the data is true and reliable. It can be applied to the study of unconventional isotope fractionation and the genesis of magmatic rocks.
FAN Jingjing, WANG Qiang
This data set mainly includes SR Nd isotopic data of 71 Mesozoic Magmatic Rocks from Murgab block to horog block in South Pamir Plateau. The lithology of rock samples includes mica granite, biotite granite, muscovite granite, felsic dyke and a small amount of diorite inclusions. The data are mainly from articles in the review stage. MC-ICP-MS is sampled by SR Nd isotope test method. The test unit is the engineering research center of the Ministry of education for the exploration of non-ferrous and precious metal concealed deposits of Guilin University of technology. The data results are true and reliable. It can be applied to study the genesis and tectonic evolution of Mesozoic Magmatic Rocks in Pamir Plateau in the future.
TANG Gongjian, DAN Wei
The separation of zircon was completed by heavy liquid and magnetic separation in the laboratory of Hebei geological team. Cathodoluminescence images are used to observe the internal structure of zircon particles, and appropriate points are selected for analysis and research. U. Th and Pb were determined in La ⁃ ICP ⁃ ms of Qinghai Tibet Plateau Institute, Chinese Academy of Sciences. For detailed analysis methods, see Li et al. (2009). Zircon standard sample and zircon sample are determined alternately in the ratio of 1 ∶ 3. The U ⁃ th ⁃ Pb isotope ratio was corrected with the standard zircon pl é sovice (337 Ma, SL á Ma et al., 2008), and the standard sample Qinghu (159.5 Ma, Li et al., 2009) was used as the accuracy of the monitoring data of the unknown sample. The isotopic ratio and age error are all 1 σ。 The data results are processed by isoplot software (Ludwig, 2001). On the basis of zircon u ⁃ Pb dating, select the age point with good harmony, and delineate the Hf isotope point in the micro area consistent with the ring trend of the age point. Zircon Hf isotope analysis is carried out on Neptune Plusma II multi receiver plasma mass spectrometer and nwr193uc 193 nm laser sampling system. See Liu et al. (2008) for detailed steps of the instrument. The diameter of laser ablation spot beam is generally 60 μ m. Each measuring point includes 10 s pre denudation, 45 s denudation and 30 s cleaning time. During the sample test, 91500 is taken as the standard sample, and its 176hf / 177hf = 0.282 286 ± 12 (2 σ， n = 21）。
WANG Shifeng
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
In situ micro area S isotope analysis adopts single point mode. In order to solve the down hole fractionation effect of sulfur isotope ratio in the analysis process (Fu et al., 2016), large beam spot (44) is selected μ m) Single laser ablation rate (about 100 Hz) and single laser ablation rate (about 2 Hz). At the same time, signal smoothing device (Hu et al., 2015) is equipped to ensure stable signal under low frequency conditions. The laser energy density is fixed at 5.0 J / cm2. Nitrogen is introduced into the plasma to reduce the interference of polyatomic ions. Sulfur isotope mass fractionation is corrected by SSB method. In order to avoid matrix effect, pyrite is corrected by pyrite reference material ppp-1; Gb26078 national standard for chalcopyrite powder correction sample; Above sample δ For the recommended value of 34sv CDT, please refer to (Fu et al., 2016). During the test, the reference material sp-po-01 of pyrrhotite in the laboratory（ δ 34sv CDT = 1.4 ± 0.4 ‰), chalcopyrite reference material sp-cp-01（ δ 34sv CDT = 5.5 ± 0.3 ‰) and international silver sulfide reference material iaea-s-2（ δ 34sv CDT = 22.58 ± 0.39 ‰) and iaea-s-3 δ 34sv CDT = - 32.18 ± 0.45 ‰) was repeatedly analyzed as a quality monitoring sample to verify the accuracy of the experimental method. In situ of gold bearing pyrite δ 34S value is 1.06 ‰ ~ 2.41 ‰, and there is no gold pyrite in slate δ The 34S value is 8.19 ‰ ~ 15.86 ‰, indicating that the sulfur related to mineralization comes from deep source rather than surrounding rock stratum.
ZHANG Linkui
Muscovite Ar dating technology obtains Muscovite single minerals by crushing, screening, manual elutriation, heavy liquid separation, magnetic separation and microscopic examination of the selected Muscovite samples. The pure minerals (purity > 99%) are cleaned by ultrasonic. The cleaned sample is sealed in a quartz bottle and sent to the nuclear reactor for neutron irradiation. The irradiation work is carried out in the "swimming pool reactor" of China Academy of atomic energy. B4 channel is used, and the neutron current density is about 2.65 × 1013n cm-2S-1。 The total irradiation time was 1440 minutes and the integrated neutron flux was 2.30 × 1018n cm-2； The standard sample for monitoring sample is also available for neutron irradiation at the same time: zbh-25 biotite standard sample, with a standard age of 132.7 ± 1.2mA and a K content of 7.6%. The graphite furnace is used for the stage heating of the sample. Each stage is heated for 10 minutes and purified for 20 minutes. Mass spectrometry analysis was carried out on the multi receiving rare gas mass spectrometer helix MC, and 20 sets of data were collected for each peak. After all data are regressed to the time zero value, quality discrimination correction, atmospheric argon correction, blank correction and interference element isotope correction are carried out. The interference isotope correction coefficient generated during neutron irradiation is obtained by analyzing the irradiated K2SO4 and CaF2, and its value is: (36Ar / 37aro) Ca = 0.0002398, (40Ar / 39Ar) k = 0.004782, (39Ar / 37aro) Ca = 0.000806. 37Ar is corrected for radioactive decay; 40K decay constant λ＝ five point five four three × 10-10 years - 1; The calculated J value is 0.003283. The 40Ar-39Ar age of hydrothermal gold bearing sericite in the main metallogenic period is 16.03 ± 0.31 Ma, indicating that the deposit was formed in Miocene, which is obviously different from the main gold deposits in Tethys Himalayan gold antimony polymetallic metallogenic belt (formed in Eocene).
ZHANG Linkui
Himalayan leucogranites are widely distributed in the North Himalayan gneiss dome (NHGD) and at the top of the Great Himalayan Crystalline Complex (GHC) and are generally controlled by detachment faults. The ages of these pre-, syn-, and postkinematic leucogranites can be used to limit the activity of detachment structures (such as the South Tibetan Detachment System, STDS). Research on the STDS activity time in the eastern Himalayas is relatively sparse. In this study, the zircon and monazite U-Th-Pb geochronology of syn- and postkinematic leucogranites, which are affected by the STDS and NHGD, in four areas (Lhozhag, Kuju, Xiaozhan and Cuonadong) in Shannan City, Tibet, China, was measured. The results show that the oldest synkinematic two-mica granite from Lhozhag, which is affected by the STDS, is 24 -25 Ma, so the time of STDS activity is at or slightly earlier than 25 Ma. The youngest synkinematic leucogranite is the garnet-bearing muscovite granite in Cuonadong at 18.4 Ma. The oldest undeformed postkinematic leucogranite (not affected by the STDS) is the muscovite granite in Xiaozhan at 17.4 Ma. Therefore, the end of STDS activity can be limited to 18.4-17.4 Ma. The STDS includes three forms: detachment fault in the NHGD (northern extension of the STDS), the inner STDS between the GHC and Tethyan Himalayan Sequence, and the outer STDS at the bottoms of synformal klippes. In this paper, the active time limits of the above three kinds of detachment zones are comprehensively summarized. Based on this work, the northward extension (ductile deformation) time of the STDS in the region is considered to be 28-17 Ma. The exhumation of the GHC is mainly controlled by in-sequence shearing. First, the South Tibet Thrust system (predecessor of the STDS) at the top of the GHC thrust southward at 45-28 Ma; then, the High Himalayan Discontinuity fault in the middle of the GHC forms south-vergent ductile thrusts at 28-17 Ma; finally, the Main Central Thrust at the bottom of the GHC thrust southward at 17-9 Ma.
ZHANG Linkui
In this study, the zircon and monazite U–Th–Pb geochronology of synkinematic and postkinematic leucogranites, which are affected by the STDS and NHGD, in four areas (Lhozhag, Kuju, Xiaozhan, and Cuonadong) in Shannan City, Tibet, China, was measured. The results show that the oldest synkinematic two-mica granite from Lhozhag, which is affected by the STDS, is 24–25 Ma, so the time of STDS activity is at or slightly earlier than 25 Ma. The youngest synkinematic leucogranite is the garnet-bearing muscovite granite in Cuonadong at 18.4 Ma. The oldest undeformed postkinematic leucogranite (not affected by the STDS) is the muscovite granite in Xiaozhan at 17.4 Ma. Therefore, the end of STDS activity can be limited to 18.4–17.4 Ma. The STDS includes three forms: detachment fault in the NHGD (northern extension of the STDS), the inner STDS between the GHC and Tethyan Himalayan Sequence, and the outer STDS at the bottoms of synformal klippes.
ZHANG Linkui
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
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 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 generated by the project are as follows: 1、 Zircon U-Pb age, Hf isotope and trace element data produced by third-party detection; 2、 Sr-Nd-Pb isotopic geochemical data of the whole rock generated by third-party detection; 3、 Whole rock major and trace element data generated through third-party detection; 4、 In situ major and trace element data of chlorite and epidote produced by third-party detection; 5、 Mineral EPMA data generated by third-party detection; 6、 Measured short-wave infrared spectroscopy and X-ray fluorescence element data in the field; 7、 Measured audio magnetotelluric data and broadband magnetotelluric data in the field; The above data were collected in the middle Gangdese metallogenic belt, Tibet. The geophysical data include audio-magnetotelluric (AMT) array covering the major porphyry Cu-deposits and the regional broad-band magnetotelluric (BBMT) array within Zhunuo mining area and surrounding areas, and also the three-dimensional electrical structure models obtained by the inversion of these data. These data were collected from July to October 2019. The magnetotelluric soundings (MT) use the natural electromagnetic fields with rich frequency components as the field source and are able to detect the electrical structure of the earth from near surface to hundreds of kilometers underground. Both the AMT and BBMT data were collected in accordance with the technical specification for natural field audio-magnetotelluric methods (No. DZT 0305-2017). They data acquisition works were conducted through Mtu-5A system developed by the Phoenix Co., Ltd., Canada. The collecting time for BBMT data were more than 24 hours and with period range of 0.004~3000s, while the values of AMT data were more than 1 h and 10000Hz~1s, respectively. The field stations were deployed in geographical coordinates. Standard robust estimation and remote reference processing were used to process the time series and reduce the effects of cultural noises, and finally the impedance tensors and the corresponding apparent resistivity, phase and other information were obtained after editing. Before inversion, the AMT and BBMT impedance data need to be analyzed in detail for dimensionality and strike information. Error floors of 7.5-10 per-cent of the absolute values of both the unrotated diagonal and off-diagonal impedances (i.e., Zxx & Zyy and Zxy & Zyx components) were applied for the 3-D inversion. The short wave infrared spectrum and X-ray fluorescence elemental analysis data are collected from Beimulang and Cimabanshuo deposits in the Zhunuo ore concentration area. The infrared spectrum data were obtained by TerraSpec® Halo of American ASD company that is full spectral range infrared mineral analyzer. The X-ray fluorescence data were obtained by the new generation NITON xl3t 950 portable XRF element analyzer of Thermo Scientific NITON. The collection time is 2018-2021. The chlorite, epidote and rock mass samples for integrated study are all collected from Beimlang, Cimabanshuo, Rmujucuo, Luobugangmu, Yawajiage and other deposits in the middle Gangdese. The trace element data of chlorite and epidote, whole rock major and trace element data and Sr-Nd-Pb isotopic data, zircon U-Pb dating and trace element data, zircon Hf isotopic data and mineral electron microprobe data for comprehensive study were completed in laboratories with relevant qualifications at home and abroad, mainly including the Centre for Ore Deposits and Earth Sciences (CODES), University of Tasmania, Australia, China University of Geosciences (Beijing), Analytical Laboratory of Beijing Research Institute of Uranium Geology, Geological Experiment and testing center, Hubei, Wuhan SampleSolution Analytical Technology Co., Ltd, and Beijing Createch Testing Technology Co., Ltd. All the data have reliable quality. The instruments used include AnalytikJena PQMS Elite ICP-MS instrument with a RESOlution 193 nm laser ablation system, laser ablation multi receiver cup plasma mass spectrometer (LA-MC-ICP-MS), X-ray fluorescence spectrometer, ICP-MS, multi receiver inductively coupled plasma mass spectrometer (MC-ICPMS), ISOPROBE-T thermal ionization mass spectrometer (TIMS) and EPMA-1600. The collection time is 2018-2021. The data set of deep prediction evaluation and prospecting demonstration of porphyry mineralization system in the middle Gangdese provides data support for researchers to study the genetic mechanism and exploration model of the porphyry copper deposit in the Gangdese belt, which show a good application prospect in guiding the prospecting breakthrough in the middle Gangdese.
ZHENG Youye , WU Song , YIN Yaotian
The study of magmatic mixing is of great significance to reveal the interaction between crust and mantle and to explore the process of diagenesis and mineralization. Jiama mining area is located in the eastern section of Gangdise metallogenic belt. It is a super large porphyry skarn type copper polymetallic deposit. Dark inclusions are widely developed in the medium acid magmatic rocks in the mining area. Detailed petrography, rock geochemistry, Sr Nd isotope geochemistry and U-Pb isotope geochronology are carried out for the diorite inclusions in the dark inclusions in order to find out the genesis of the rocks, It provides enlightenment for magmatic mixing and mineralization, and improves the Jiama diagenesis and mineralization model. The analysis and testing of major and trace elements in rocks were completed in Beijing Institute of geology of nuclear industry. Zircon U-Pb isotopic dating was completed in the deposit geochemical microanalysis room of the State Key Laboratory of geological processes and mineral resources of China University of Geosciences (Beijing). The laser denudation system used for isotopic dating is the geolas193 excimer solid injection system made in the United States, ICP-MS is a Thermo Fisher X Series II quadrupole plasma mass spectrometer produced in the United States. Good data quality.
ZHANG Zebin , WANG Liqiang
