This data set contains zircon U-Pb dating, zircon Hf isotope, whole-rock principal, and trace element data of diorite granite and andesite dacite in Xinjiang area, south of bango, Qinghai Tibet Plateau. The data results are from the Zhai Qingguo research team, Institute of Geology, Chinese Academy of Geological Sciences. The data are of good quality and can be used to study the ocean closure process of Bangong Lake Nujiang suture in the central Qinghai Tibet Plateau, the subsequent collision process of Lhasa Qiangtang block, magmatism, and the Cretaceous crustal regeneration and reconstruction of Lhasa block in the central and Northern Qinghai Tibet Plateau. At the same time, this data also provides zircon CL images and reflection photos of all samples, zircon location for reference and comparison, and also provides a basis for the chronology of magmatic rocks and zircon genesis in the study area at the same time. Zircon U-Pb age instrument: obtained from laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS), zircon Hf isotope instrument: Neptune multi-collector inductively coupled plasma mass spectrometry (MC – ICP – MS), connected by a goals-193 laser ablation system. The main and trace elements of the whole rock are measured by the National Experimental Center (Academy of Geosciences), Major elements: (XRF; Axios – pw4400), trace elements: ICP-MS; PerkinElmer NexION 300D。
WANG Wei
This data is the U-Pb age of cassiterite. The samples were collected from cassiterite minerals in skarn type and quartz vein type ores in Songshan tin mine, western Yunnan. The U-Pb geochronology of cassiterite was studied by laser denudation inductively coupled plasma mass spectrometry. The 207Pb / 206Pb - 238U / 206Pb harmonic ages of the two cassiterite samples were 76.6 ± 1.5 Ma and 79.6 ± 3.6 Ma respectively, It shows that the tin mineralization of the Songshan tin deposit mainly occurred in the Late Cretaceous, which is obviously different from the emplacement time of Lincang granite (Triassic). Combined with geological characteristics and previous chronological results, this paper believes that there is an obvious tin mineralization event in the Late Cretaceous in this area. The next prospecting work in this area should focus on the contact zone between rock mass and surrounding rock, as well as the faults in the rock mass and surrounding rock.
LI Xiaofeng
This data set includes whole-rock major trace and isotopic geochemical data, monazite, and zircon radioisotope dating data. The samples were collected from the Laguigangri dome of the Himalayan orogenic belt in southern Tibet. The geochemical data of major elements in the whole rock are obtained by X-ray fluorescence spectrometer, the trace elements are obtained by inductively coupled plasma mass spectrometer, and the radioisotope dating of monazite and zircon is obtained by laser denudation inductively coupled plasma mass spectrometer. The data quality is high. These data show that the leucogranitic magma in the Himalayan orogenic belt was formed in multiple stages and came from different homologous areas, which provides a key limit for the magmatic formation mechanism.
LIU Xiaochi
This data includes whole-rock major and trace geochemical data, zircon major elements data, and whole-rock Sr-Nd-Hf isotopic composition data. The samples were collected from the Kangba dome in southern Tibet. The major elements in the whole rock were analyzed by X-ray fluorescence spectrometry (XRF) glass melting sheet method; The trace elements in the whole rock were dissolved by mixed acid dissolution method and tested by Quadrupole Inductively coupled plasma mass spectrometer (Q-ICPMS); The major elements of zircon were analyzed by electron microprobe; For the analysis of Sr-Nd-Hf isotopic composition of the whole rock, the accurate content of three elements is determined by quadrupole ICP-MS, and then the isotopic ratio is determined by MC-ICP-MS. The data obtained show that Kangba leucogranite is crystallized from highly evolved magma that has experienced strong crystallization differentiation. Strong hydrothermal exsolution has occurred in the diagenetic process, and the isotopes of the magmatic system have migrated to varying degrees in the process of hydrothermal fluid. It is also obviously contaminated by the surrounding rock.
LIU Zhi-Chao
The data are monazite and zircon U-Pb ages. Three samples of carbonatite and pegmatite were collected (2018kl06 is carbonatite, 2018kl101 is tourmaline bearing pegmatite near carbonatite, 2018kl08-2 is beryl bearing pegmatite). After crushing, heavy sand minerals were separated by manual elutriation. After magnetic and electromagnetic separation, monazite (about 500 grains) and zircon (more than 1000 grains) were picked out under binocular lens. After selecting representative monazite as target, the internal structure of monazite was studied by BSE through microscope transmission light and reflection light photography. U-Pb chronology was completed on the 193 nm laser ablation system (new wave) and multi receiver inductively coupled plasma mass spectrometer in the laboratory of Tianjin Institute of Geology and mineral resources. In 2018kl06 carbonatite, the intersection age of the reverse inconsistency line of 17 test points is 18.2 ± 0.3 Ma, while the average age of 9 test points with complete harmony is 18.15 ± 0.22 Ma; The monazite of sample 2018kl101 obtained 15 measuring points with concordance greater than 90%, and the average age is 19.39 ± 0.36 Ma; The average age of 20 zircon sites of sample 2018kl08-2 is 197.5 ± 1.4 ma. They are Cenozoic and Mesozoic (19 ~ 18 Ma and 200 MA), respectively. The early beryl bearing pegmatite was formed in the extension stage after the closure of the paleoTethys ocean, while the Cenozoic bastnaesite carbonatite pegmatite assemblage is related to the Cenozoic intracontinental strike slip extension event, indicating that the extension strike slip of Pamir structural junction may start at 19 ma. Combined with the characteristics of regional geochemical anomalies, it shows that a breakthrough in rare and light rare earth prospecting is expected in Pamir area.
WANG Wei
This data is monazite U-Pb age. The samples are collected from the light colored veins closely associated with the lead-zinc ore. after crushing, the heavy sand minerals are separated by manual elutriation. After magnetic separation and electromagnetic separation, monazite (about 500 grains) are picked out under binocular lens. After selecting representative monazite as target, the internal structure of monazite was studied by BSE through microscope transmission light and reflection light photography. U-Pb chronology was completed on 193 nm laser ablation system (new wave) and multi receiver inductively coupled plasma mass spectrometer (MC-ICP-MS, Neptune) in the laboratory of Tianjin Institute of Geology and mineral resources. The average 206Pb / 238U surface age obtained from 21 survey points is 99.25 ± 0.78 MA (mswd = 1.60). This age represents the crystallization age of light vein closely related to lead-zinc mineralization. It is determined that the formation of the deposit is related to the hydrothermal solution in the late evolution of Cretaceous magmatic rocks. According to the comprehensive analysis of regional geochemical exploration and regional geological background, it is considered that the giant lead-zinc ore belt distributed in Tianshuihai Karakoram is controlled by Jurassic Cretaceous volcanic sedimentary basin and Cretaceous magmatic rocks. This metallogenic belt has great prospecting potential.
WANG Wei
This data includes the main trace geochemical data of the whole rock. The samples were collected from lalitoushan rock mass at the north end of the Changning-Menglian junction zone in western Yunnan. The main geochemical data of the whole rock are obtained by X-ray fluorescence spectrometer, and the trace elements are obtained by inductively coupled plasma mass spectrometry. Based on the obtained data, it is considered that the initial magma is mainly composed of continental crust and the addition of mantle-derived components. The rock mass belongs to S-type granite, which originates from the partial melting of ancient crustal materials and is mixed with mantle-derived magma. It represents the product under the dynamic background of transformation from compression to extension in the post continental collision stage of Baoshan Simao block and has the material basis for mineralization, It has certain prospecting potential.
XU Heng
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
Data content: A large number of strongly deformed quartz veins are developed in the Ramba Dome, which records the fluid activity information in the extensional structure. Raman analysis of inclusions in quartz veins in the footwall and hangingwall of the STDS show that the main liquid phase component of inclusions is H2O and the gas phase components are CO2 and CH4. The existence of CO2 and CH4 represents the contribution of deep source fluids. The main source of CO2 is related to regional and contact metamorphism in the Ramba Dome. This data set has been published in the geological journal. Data source and processing method: The experimental work is mainly studied by WiTEC GmbH micro confocal Raman spectroscopy imaging system (alpha300R). The Raman experimental data analysis is completed in the laboratory of WiTEC Beijing demonstration center, using 532 nm laser as excitation light source, and the Raman spectral data is processed by WiTEC Project Five software. Data quality: The scanning area is 8 µm × 7 µ m, including 504 pixels, the integration time of each pixel is 1s, the spatial resolution is 350 nm, the data quality is high and the reliability is strong. Data application achievements and prospects: Through the analysis of mineral facies of inclusions, we observed the spatial distribution, correlation and chemical differences of different components of gas-liquid phase in quartz vein inclusions in Ramba Dome. The experimental method is based on the fast Raman imaging technology with high sensitivity and high resolution, which solves many difficult tests pain points in the geological field. At the same time, WiTEC Raman system provides excellent expansion performance for many scientific research workstations with its open structure, which greatly reduces the difficulty of realizing various in-situ experiments such as high and low temperature, high pressure, and reaction process.
LI Xiaorong, ZHANG Bo
This data includes zircon U-Pb dating of metamorphic rocks and basalts in the Precambrian continental crust remnant in the northwest of the North Qilian orogenic belt measured from 2019 to 2021, major and trace and Sr nd Hf isotopic geochemical test results of the whole rock, and major and trace geochemical test results of minerals. The main instruments used are Aglient 7500a ICP-MS, X-ray fluorescence (XRF), inductively coupled plasma mass spectrometry (ICP-MS), thermo Finnigan Triton thermal ionization mass spectrometer (TIMS), Neptune MC ICPMS and electron microprobe (EMPA). The data quality is high and within the error range. According to the data, the Precambrian continental crust fragments can be divided into three stages: Paleoproterozoic (1.7 GA), early Mesoproterozoic (1.6 GA) and middle Mesoproterozoic (1.5-1.2 GA), which were formed in the continental margin arc, intracontinental rift and initial ocean basin environment respectively. It is revealed that the Qilian block is located in the southwest of the core of the ancient lombia supercontinent.
LIU Yixin
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. Silurian δ13Ccarb curves from Euramerica 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. 43 geochemical samples were collected from the Wenlock to Pridoli Pulu 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. At the Yalai 2 section, δ13C values show a major positive shift in the Ludlow, which could be recognized in other sections around the world, indicating that major carbon cycling perturbation occurred during this time interval. This dataset include 43 carbon and oxygen isotopic records.
CHEN Zhongyang
The study of chemical weathering is of great significance to understand how the plateau uplift regulates the mechanism of climate change and the circulation of elements and materials in the sphere. The data set is the seasonal major element concentration and stable isotope data of the river water at the hydrological station of the Yellow River Basin originating from the Qinghai Tibet Plateau. There are two hydrological stations in total: 1. Longmen hydrological station in the middle reaches of the Yellow River is the high-resolution (weekly) sample data collected in 2013, and the element concentrations include K, CA, Na, Mg, SO4, HCO3, Cl, etc. The cation data of collected water samples are tested on ICP-AES of Institute of earth environment, Chinese Academy of Sciences, and the anion data are tested on ion chromatograph (ics1200) of Nanjing Institute of geography and lakes, Chinese Academy of Sciences. The uncertainty is within 5%, and HCO3 is tested by titration. The high-resolution (weekly) Li isotope data of river water was tested in MC-ICP-MS of Institute of earth environment, Chinese Academy of Sciences in 2017, and the test accuracy 2sd is better than 5 ‰; 2. Tangnaihai hydrological station on the Yellow River is the river water (month by month) data set collected from July 2012 to June 2014. The major element concentrations include K, CA, Na, Mg, SO4, HCO3, Cl, etc., and the stable isotope data include s, O and H. The data set can be used to study the modern weathering process under the background of the uplift of the Qinghai Tibet Plateau, and provides the first-hand reliable data for the study of physical erosion and chemical weathering in the basin.
JIN Zhangdong, ZHAO Zhiqi
1) This data set includes chemical composition analysis of Xinhua Phosphorite (Early Cambrian) and Weng'an Phosphorite (Sinian) in Zhijin, Guizhou Province, China, including whole rock chemical composition of Zhijin and Weng'an phosphorite in Guizhou Province, whole rock Sr-Nd-Pb isotopic analysis data of Zhijin and Weng'an phosphorite in Guizhou Province, in-situ Sr isotopic analysis of apatite in Zhijin and Weng'an phosphorite in Guizhou Province, The purpose of this paper is to give the genesis and REE enrichment mechanism of phosphorites in Guizhou from the perspective of major and trace geochemistry and isotope geochemistry; 2) The whole rock chemical analysis was conducted by Aoshi analysis and testing (Guangzhou) Co., Ltd., the whole rock SR nd Pb isotope analysis was conducted by Guizhou Tongwei Test Technology Co., Ltd., and the apatite in situ Sr isotope analysis was conducted by Beijing Kehui Analysis Technology Co., Ltd; 3) The data set can well show the chemical composition and isotopic geochemical information of Zhijin phosphate rock and Weng'an phosphate rock in Guizhou; 4) This data is of great significance for a detailed understanding of the formation process and REE enrichment mechanism of Zhijin and Weng'an phosphate deposits in Guizhou.
ZHANG Zeyang, XING Jieqi
The data of this project after sampling and testing are as follows: (1) In 2017, bedrock core samples from 2 and 3 boreholes were collected from renju rare earth mining area in Guangdong Province. After mechanical crushing, slicing and single mineral selection, they passed the Key Laboratory of minerals and mineralization, Guangzhou Institute of geochemistry, Chinese Academy of Sciences, and Australian analytical testing (Guangzhou) testing company used X-ray powder diffractometer, X-ray fluorescence spectrometer and X-ray fluorescence spectrometer The mineral composition, iron oxide composition, whole rock chemical composition, mineral chemical composition, rare earth occurrence state and other data of 2 # and 3 # boreholes in renju rare earth deposit in Guangdong Province were measured by ICP-AES, visible short wave infrared reflectance spectroscopy and electron microscope; (2) In 2018, goethite samples were synthesized in the Key Laboratory of minerals and mineralization, Guangzhou Institute of geochemistry, Chinese Academy of Sciences. The phase, morphology and surface physicochemical properties of the synthesized samples were tested by X-ray fluorescence spectrometer, electron microscope, zeta potential analyzer and other instruments; The synthetic goethite was used to simulate the adsorption of rare earth ions. The concentration of rare earth ions was measured by inductively coupled plasma emission spectrometer to characterize the adsorption capacity and adsorption behavior of rare earth ions on the surface of goethite; The surface complexation model software visual MINTEQ was used to fit the adsorption data and determine the intrinsic adsorption constants of rare earth ions. (3) In 2018, kaolinite and halloysite samples were obtained in Maoming, Guangdong Province and Linfen, Shanxi Province, respectively. The phase, morphology and surface physicochemical properties of the samples were tested by X-ray powder diffraction, scanning electron microscopy, zeta potentiometry and other instruments; The adsorption capacity and behavior of rare earth ions on kaolinite and halloysite were characterized by ICP-AES. (4) In November 2018, 32 weathering profile samples of metamorphic rocks were collected in the ion adsorption rare earth mining area of metamorphic weathering crust in Ningdu County, Ganzhou City, Jiangxi Province. After mechanical crushing, slicing, chemical sequential extraction and whole rock acid dissolution experiments, the samples were passed through the Key Laboratory of minerals and mineralization, Guangzhou Institute of geochemistry, Chinese Academy of Sciences, Aoshi analytical testing (Guangzhou) Co., Ltd. uses X-ray powder diffraction, X-ray fluorescence spectrometer, inductively coupled plasma mass spectrometry, METTLER TOLEDO five easy plus ™ The mineral composition, chemical composition, pH value of soil erosion, thin section identification and SEM image data of ion adsorption type rare earth ore profile of metamorphic rock weathering crust were produced by testing with pH meter, optical microscope and electron microscope; (5) In 2021, the survey of rare earth ore was carried out in Dongyuan County, Guangdong Province, and the sampling work of 17 sections was completed. 62 samples were collected and the ion phase extraction and chemical analysis of 62 samples were carried out; The test and analysis can provide a theoretical basis for the enrichment, migration and mineralization of rare earth elements in weathering eluvial rare earth deposits.
HUANG Jian, YANG Meijun, LI Xiaoju, HUANG Yufeng
Core samples (zk2407 / zk3204 / zk2403 / zk5604) were collected from Huayangchuan uranium and polymetallic mining area of Shaanxi Province in 2019 and 2020. After mechanical crushing, the rare earth content of the drilling samples in Huayangchuan mining area was tested by using ICAP Q inductively coupled plasma mass spectrometry. The sample was taken from the core of Huayangchuan mining area in Shaanxi Province. 0.1000g sample was weighed and put into a closed sample dissolver. 1ml hydrofluoric acid and 0.5ml nitric acid were added. The cylinder cap was covered and tightened. Keep it at 185 ℃ for 24h, take it out and cool it, evaporate it to dryness on the electric heating plate, add 0.5ml nitric acid to evaporate it to dryness and repeat once, add 5ml (1:1) nitric acid to heat and extract, transfer it into a 50ml volumetric flask, set it to the scale and shake well. ICP-MS was used for determination. The quality control is carried out according to the requirements of "quality management specification for geological and mineral laboratory testing" (dzg 0130-2006).
YANG Shuai
The data mainly come from typical iron rare earth formation and carbonate type rare earth deposits in China, such as Bayan Obo rare earth deposit in the north, Qinling orogenic belt in the middle, Mianning Dechang rare earth deposit belt in the southwest and Kangdian area. In situ U-Pb or U-Th-Pb dating, major and trace elements of whole rock, major and trace elements of minerals in situ, sr-nd-o-s isotopes and temperature measurement of fluid inclusions have been carried out for the rocks and ores in these deposits. The major elements of whole rock are mainly determined by XRF, trace elements of whole rock are mainly determined by ICP-MS, U-Pb and U-Th-Pb dating and in-situ trace elements of minerals are mainly obtained by LA-ICP-MS, major elements of minerals are mainly obtained by EPMA, and sr-nd-o-s isotopes of minerals are mainly obtained by tims, Sims and la-mc-icp-ms, The temperature measurement of fluid inclusions is mainly obtained by hot and cold stage and laser Raman spectroscopy. Based on these data, we mainly discuss: (1) the formation mechanism and deposit model of iron rare earth ore deposits（ 2) The shallow characterization of deep mineralization of Fe REE constructive REE deposits（ 3) Shallow characterization of deep mineralization of alkaline carbonatite type REE deposits（ 4) Metallogenic potential prediction of typical mineralization anomaly area.
CHEN Wei, YANG Kuifeng, XU Deru, LIU Yulong, ZHANG Wei, LIU Lei, MA Ronglin
This data is the chemical analysis results of REO, Mo and Au of deep drilling samples in Maoniuping rare earth mining area. In 2020, zks-2 borehole with depth of 1395.33m was constructed in P31 exploration line of Maoniuping rare earth mining area for demonstration of deep exploration and storage increase in Western Sichuan rare earth resource base. A total of 717 samples were collected from the whole hole bedrock core by using the split core machine and half split method. The data were analyzed by Agilent 7900 plasma mass spectrometer and other instruments. REO analysis was performed on all samples, and Mo analysis was performed on 549 deep samples. The data directly reflect the content of rare earth and molybdenum in the depth of Maoniuping mining area.
PENG Yi
This data is the chemical analysis results of REO, Mo and Au of deep drilling samples in Maoniuping rare earth mining area. In 2018, drilling ZKS-1 with a depth of 1105.86m was constructed in P50 exploration line of Maoniuping rare earth mining area. A total of 656 samples were collected from the whole hole bedrock core by using the split core machine and half split method. The data were analyzed by Agilent 7900 plasma mass spectrometer and other instruments. All samples were analyzed by REO, among which 301 samples were analyzed by Mo and a few samples were analyzed by Au. The data directly reflect the content of rare earth and molybdenum in the depth of Maoniuping mining area.
PENG Yi
This data is zircon U-Pb age data of Yanshanian intermediate acid rocks in the northern margin of North China and its adjacent areas. Zircon U-Pb dating was completed using cameca ims-1280hr in the ion probe Laboratory of Institute of Geology and Geophysics, Chinese Academy of Sciences. The U-Th-Pb isotope ratio was obtained by the calibration of standard zircon Pl e sovice. Simultaneous interpreting of the standard deviations obtained from the long-term monitoring of standard samples and the accuracy of the single point test were used to obtain the sample single point error, taking the standard sample Qinghu as the accuracy of the unknown sample monitoring data. The measured 204Pb value is used for ordinary Pb correction. The isotopic ratio and age error are all 1 σ。 Harmonic age and mean age were calculated using isoplot software. Through the obtained data, we can find out the temporal and spatial distribution of magmatism in the study area, establish the chronological framework of the northern margin of North China and its adjacent areas, and provide chronological basis for further study of geodynamic mechanism in this area.
GE Wenchun
This data is SR Nd isotopic geochemical data of Yanshanian intermediate acid rocks in the northern margin of North China and its adjacent areas. SR Nd isotope data were obtained by MC-ICP-MS analysis. Some data have been published in high-level SCI journals, and the data are true and reliable. SR Nd isotopic data can find out the variation law of isotopic composition in the study area. It is an important part of Geochemistry and geochronology. It is one of the most important tracing means to explore rock genesis and crust mantle evolution. This data can provide a trace of the magma source area in the northern margin of North China and its adjacent areas. It is an effective way to explore the genesis of intermediate acid rocks in this area, and provide support and help for the further study of regional geodynamic mechanism.
GE Wenchun
