Analysis data of elements, isotopes and chronology of deposits in Kunlun Mountain Area (2019-2022)

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.

0 2022-05-18

The record and photo gallery of the geological expedition of Northern Pakistan, the adjacent zone of Tibet Plateau

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.

0 2022-04-21

Geochemical data set of typical rare earth deposits in China (2017-2021)

The data set mainly includes typical rare earth deposits in China, such as Maoniuping and Lizhuang rare earth deposits in Mianning, Western Sichuan, and Gansha OBO rare earth deposits in Gansu Province. These rare earth deposits are genetically related to carbonate alkaline rock complex. In situ U-Pb dating, whole rock major and trace elements, Sr nd Pb radioisotopes, C-O-B-Ca stable isotopes and mineral in situ major and trace elements contents of rocks or ores in these complexes were analyzed. The major elements were measured by X-ray fluorescence spectrometer (XRF), the trace elements were measured by inductively coupled plasma mass spectrometry (ICP-MS), and the isotopes were mainly measured by mc-icp-ms. The main conclusions are as follows: (1) it is revealed that the magma source area of alkaline carbonate type REE deposit experienced the addition of strong subduction material, and its formation depth may be deeper than previously thought(2) It is revealed that the aegirization may be related to carbonatite and alkaline magmatism, and there may be differences in the aegirization between the two types of magma(3) The later reformation of the rare earth deposits with younger age may be relatively weak, while the rare earth deposits with older age are easy to be influenced by the later geological process and difficult to distinguish.

0 2022-04-19

Zircon HF-O isotopic data set of Cretaceous granites from Alichor, South Pamir (2021)

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.

0 2022-04-18

Whole rock SR Nd isotopic geochemical data set of Mesozoic magmatic rocks in the Murgob-Khorg area, South Pamir (2021)

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.

0 2022-03-28

B-Mo isotope data set of the Cenozoic Zhengga granites and Sailipu potassic rocks from Lhasa terrane, southern Tibet (2021)

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.

0 2022-03-28

Zircon U-Pb dating and Hf isotope data of granite in eastern Tibet

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)。

0 2022-03-23

SR Nd isotopic test data of granite in eastern Tibet

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.

0 2022-03-23

Carbon and oxygen isotopic features of marine carbonate rocks from the Wat Mong Kratae section in western Thailand (470-467 Ma)

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.

0 2022-02-26

Carbon and oxygen isotopic features of marine carbonate rocks from the Shuangdiandaban section in Ali area, Tibet (359-340 Ma)

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.

0 2022-02-26