Geochronology and geochemistry of Yanshanian intermediate-acid rocks in the northern margin of North China and its adjacent areas

The data are the whole rock major and trace elements, Sr-Nd-Pb-Mg isotopic geochemical data, zircon U-Pb age data and Hf isotopic geochemical data and Sulfide sulfur isotope data of Yanshanian intermediate-acid rocks in the northern margin of North China and its adjacent areas. The major data of the whole rock were obtained by XRF analysis, the trace element data were obtained by ICP-MS analysis, and the Sr-Nd-Pb-Mg isotopic data were obtained by MC-ICP-MS analysis. Zircon U-Pb age data were obtained by LA-ICP-MS and SIMS analysis, and Hf isotope data were obtained by MC-ICP-MS analysis. Sulfide sulfur isotope data were obtained by LA-MC-ICP-MS analysis. The above data have been published in high-level SCI journals (Mg isotope data has not been published), and the data are true and reliable. Through the obtained data, we can find out the temporal and spatial distribution of magmatism, the variation of petrochemistry and isotopic composition in the study area, analyze the properties of rock source area, melting conditions and magmatic evolution process in detail, trace the dynamic process of tectono-magmatic process, and analyze the constraints of superposition and transformation of the tectonic domains of the Okhotsk Ocean and the Pacific Ocean on magmatism and mineralization in the area, The time limit from subduction, extinction to mutual transformation of the paleo oceanic crust will provide a key constraint for revealing the relationship between the deep process of Yanshanian movement and magma mineralization.

0 2021-06-18

Exhumation fission track thermochronology of the late Cretaceous Cenozoic in the southeastern margin of the coastal mountains of southeastern China

This data is apatite and zircon fission track chronology data. The samples were collected from the southeastern margin of the coastal mountains in Southeast China. They are mainly fine-grained to coarse-grained granites from Late Triassic to early Cretaceous and coarse-grained granites from early Paleozoic. Apatite and zircon particles were prepared by crushing, sieving, magnetic separation and heavy liquid separation. The apatite and zircon particles were coated with epoxy resin and FEP polytetrafluoroethylene sheets. Finally, high quality data were obtained by fission track age analysis and external detection method. The data provide an important reference value for the process of rapid, slow, accelerated, cooled and inferred exhumation from Late Cretaceous to Cenozoic.

0 2021-06-18

Late Cretaceous Cenozoic exhumation in Yanji area: low temperature thermochronology data set

This data is the fission track data, (U-Th - [SM]) / he apatite age, (U-Th) / he zircon age of granite. The samples are mainly collected from Phanerozoic granites in Tianfozhi mountain, southwest Yanji, Jilin Province, most of which are Jurassic granites, and a small number of Permian, Triassic and early Cretaceous granites. Apatite fission track ages are obtained by external detectors;( U-Th - [SM]) / he apatite age and (U – th) / he zircon age were obtained by degassing apatite and zircon with 820 nm optical coupled fiber-optically coupled diode laser and analyzed by inductively coupled plasma mass spectrometry (ICP-MS) ; The cooling history and exhumation history from Late Cretaceous to Cenozoic in Yanji area can be limited by the obtained data.

0 2021-06-16

Geochemical and U-Pb geochronological data set of heavy minerals in Yarlung Tsangpo River

The samples of this data set are from the modern river sand in Lhasa River and Nianchu River in Yarlung Tsangpo River Basin and Pumchu collected by Hu Xiumian research group of Nanjing University in 2016; By extracting detrital zircon, monazite, titanite and rutile from the river sand, LA-MC-ICP-MS was performed to determine the trace elements and U-Th-Pb geochronology. The above tests were conducted by professionals at the Institute of Geology and Geophysics, Chinese Academy of Sciences, Nanjing University and Trinity College, Ireland with high quality; The above data have been published in earth science review. Relative geochronological data from bedrock in these river basins were also collected for comparison.

0 2021-06-16

Genesis of late Miocene laminar dolostones in Lunpola Basin, Qinghai Tibet Plateau

The problem of dolomite has always been concerned by sedimentology. However, it is still impossible to form low-temperature primary dolomite without catalyst in the laboratory, so the kinetic mechanism of dolomite formation has been in doubt. Microbial induction can effectively promote the formation of primary dolomite, but its control mechanism is still unclear. At the same time, a large number of examples of microbial induction of primary dolomite are concentrated in the modern environment and laboratory conditions, and the relevant reports on deep strata are very limited. In this study, the stratiform dolostones in the late Miocene Niubao formation obtained from well Wang 1 in Lunpola Basin, central Qinghai Tibet Plateau, are taken as the research objects. The petrographic characteristics of stratiform dolostones are derived from thin section observation, the characteristics of ancient water body are derived from stable carbon and oxygen isotope analysis, and the micro scale morphology of dolostones, The spatial distribution of the minerals was observed by SEM and TEM. Mineralogical, diagenetic and isotopic analyses indicate that dolomite is a primary deposit, thus retaining a large number of original sedimentary features. The oxygen isotope values of dolomite ranged from - 3.2 to - 1.76 ‰ and the carbon isotope values ranged from - 2.62 to - 3.78 ‰. The average oxygen isotope values of reconstructed paleowaters were - 3.87 ‰, indicating that dolomite was formed in a strong evaporation environment. Laminar dolomite is composed of organic rich layer and silicate clastic layer. The dolomite is characterized by nanospheres with a diameter of about 80-100nm. In space, it can be seen that it is specifically adsorbed on the surface of organic matter film and flaky clay minerals, and has obvious characteristics of aggregation and morphological growth. This may indicate that organic matter film and flaky clay mineral surface can promote the formation of low-temperature dolomite, which is basically consistent with the results observed in the laboratory. It provides a detailed research case for revealing the formation process of primary dolomite at deep time.

0 2021-06-16

Zircon isotopic dating of the Yanshanian A-type granite in eastern China

The isotopic geochemistry data set of Yanshanian A-type granites in eastern China includes zircon U-Pb geochronology data of Nianzishan, Heilongjiang, balzhe, Inner Mongolia, Xiangshan, yansehu, Xiwanzi, Laoshan, Qingdao, Suzhou, Qingtian, Zhejiang and Kuiqi, Fujian. From 2016 to 2021, systematic zircon U-Pb isotopic geochronology of the Yanshanian A-type granites in eastern China was carried out to explore the petrogenesis of the A-type granites and their relationship with the lithospheric structure and geodynamic background of the Yanshanian in eastern China, and to reveal the principle of isotopic fractionation and its main controlling factors in the differentiation and evolution of the A-type granites.

0 2021-06-16

Geochemical compositions of Yanshanian A-type granites in eastern China

The geochemical composition data set of Yanshanian A-type granites in eastern China includes the geochemical compositions of major and trace elements of Nianzishan, Heilongjiang, balzhe, Inner Mongolia, Xiangshan, yansehu, Xiwanzi, Laoshan, Qingdao, Suzhou, Qingtian, Zhejiang and Kuiqi, Fujian. From 2016 to 2021, through systematic comparative analysis of petrogeochemistry of Yanshanian A-type granites in eastern China, this paper discusses the petrogenesis of A-type granites and its relationship with lithospheric structure and geodynamic background of Yanshanian eastern China, and further reveals the geochemical behavior and enrichment metallogenic mechanism of rare metal elements in the process of magmatic differentiation and evolution of A-type granites.

0 2021-06-16

Tin deposits in the United States, England, Germany and Bolivia: records of redox reactions in hydrothermal solution - tin isotope fractionation dataset (2018)

This data set is the tin isotopic composition data of cassiterite and stannite. The samples were mainly from South Dakota, USA; Cornwall, England; There are four tin metallogenic belts with different metallogenic environments in Germany, Czech Republic and Andean tin belt in Bolivia. The tin isotopic compositions of cassiterite and stannite were determined by ICP-MS. The data has been used in the publication of articles, and the data quality is high and reliable. Based on the data obtained, the variation of Sn isotopic composition reflects the original Sn isotopic composition of the deposit, which proves that the cassiterite formed in the early stage is related to the change of source or magmatic process, and tin isotope can provide information about redox reaction and rock source and process.

0 2021-06-16

Zircon U-Pb ages, geochemistry and Sr-Nd-Pb isotopic compositions of the Late Triassic Baoji pluton in the North Qinling orogenic belt

LA-ICP-MS zircon dating, XRF and ICP-MS geochemical composition of the whole rock, and tims Sr-Nd-Pb isotopic composition show that the early Mesozoic Baoji pluton belongs to high-k calc alkaline, quasi aluminous weak peraluminous series. From granodiorite to K-feldspar granite, the contents of MgO, feot, TiO2, Cao and P2O5 decrease with the increase of SiO2 content. Combined with the whole rock Sr-Nd-Pb isotopic characteristics, the granodiorite mainly came from partial melting of the crust and experienced magma mixing. Monzodiorite is rich in Sr-Nd isotopic composition and high in Mg # and MgO, which is derived from the metasomatic lithospheric mantle. The K-feldspar granites have evolved Sr-Nd-Pb isotopic compositions and are derived from partial melting of the ancient crust. The data comes from the scientific research project "deep process and resource effect of Yanshanian major geological events" (2016YFC0600404).

0 2021-06-16

Geochemical data of Dahutang w-cu-mo deposit in South China

This data set mainly includes fluid inclusion data and h, O isotope data of scheelite, wolframite, fluorapatite and quartz in Dahutang deposit, as well as major element data of altered mineral chlorite. In 2018, the samples were collected from the Dahutang w-cu-mo deposit in South China. The major element composition of chlorite was measured by electron microprobe microanalysis, the fluid inclusion data was measured by Linkam MDS 600 and Renishaw RM2000 laser Raman microprobe, and the hydrogen and oxygen isotopic composition of minerals was measured by thermo Finnigan Deltaplus XP isotope ratio mass spectrometer (IRMS). According to the measured data, the evolution process of ore-forming fluid in Dahutang deposit is constrained.

0 2021-06-15