青藏高原东南缘腾冲地区晚中生代邦瓦花岗岩基Mo同位素数据集

该数据集主要包括腾冲地区晚中生代邦瓦花岗岩基Mo非传统同位素数据，该数据主要用来研究熔融过程中Mo同位素分馏机制，对腾冲地区邦瓦花岗岩的源区组成及岩浆产生、演化过程等研究具有重要意义。该数据集包括Mo同位素数据24件，包括全岩和单矿物分析。溶液和矿物的Mo同位素分析都采用MC-ICP-MS。测试单位为中国科学院广州地球化学研究所。该数据集数据未发表。通过对其进行Mo同位素研究发现：(1)邦瓦花岗岩全岩和单矿物Mo含量变化于<0.05~35.30 ppm 之间，其全岩Mo含量(0.05~0.72 ppm)显著低于上大陆地壳的Mo含量；而花岗岩中的长石、黑云母和角闪石的Mo含量都较低(0.13~0.77 ppm)，但榍石的Mo含量很高(22.4~35.3 ppm)，可能为邦瓦花岗岩中Mo的主要宿主；(2)花岗岩中矿物的Mo同位素组成范围为−0.72‰~0.64‰ ，而全岩的Mo同位素组成 (−0.1‰~−3.09‰)明显低于大陆地壳Mo同位素组成范围。其中极端Mo同位素的发现及其矿物分析揭示出Mo在岩浆系统中并不会发生大的分馏，相反在热液系统会发生强烈的分馏，Mo的宿主矿物主要为一些纳米级的矿物，这些矿物导致了Mo同位素的极端分馏。这一研究为解释很多热液矿床成因提供了新的启示意义。

This dataset mainly contains non-traditional molybdenum (Mo) isotope data of the Bangwa granite batholith in the Tengchong area from the Late Mesozoic. This data is primarily used to investigate the mechanism of Mo isotopic fractionation during melting, and is of great significance for research on the source composition, magma generation and evolution of the Bangwa granite in the Tengchong area. This dataset includes 24 sets of Mo isotope data, covering whole-rock and single-mineral analyses. Mo isotope analyses of both solutions and minerals were performed using MC-ICP-MS. The analyses were conducted by the Guangzhou Institute of Geochemistry, Chinese Academy of Sciences. All data in this dataset have not been published. Research based on Mo isotope analyses yields the following findings: (1) The Mo concentrations of whole-rock and single-mineral samples from the Bangwa granite range from <0.05 to 35.30 ppm. The whole-rock Mo concentrations (0.05–0.72 ppm) are significantly lower than those of the upper continental crust. The Mo concentrations of feldspar, biotite and amphibole in the granite are relatively low (0.13–0.77 ppm), while titanite exhibits high Mo concentrations (22.4–35.3 ppm), which may be the main host phase of Mo in the Bangwa granite. (2) The Mo isotope compositions of minerals in the granite range from −0.72‰ to 0.64‰, while the whole-rock Mo isotope compositions (−0.1‰ to −3.09‰) are significantly lower than the range of Mo isotope compositions of the continental crust. The discovery of extreme Mo isotope compositions and corresponding mineral analyses indicates that Mo does not undergo significant fractionation in magmatic systems, but undergoes strong fractionation in hydrothermal systems. The main host phases of Mo are certain nanoscale minerals, which lead to extreme Mo isotopic fractionation. This research provides new insights for explaining the genesis of numerous hydrothermal ore deposits.