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Genesis of Si-rich carbonatites in Huanglongpu Mo deposit, Lesser Qinling orogen, China and significance for Mo mineralization
Wenlei Song;  Cheng Xu;  Liang Qi;  Li Zhou;  Linjun Wang;  Jindrich Kynicky
2015
发表期刊Ore Geology Reviews
卷号64页码:756-765
摘要

The Huanglongpu carbonatite-related Mo ore field is located in the Lesser Qinling Orogenic belt in the southern margin of the North China block. The ore field is composed of six deposits, Yuantou, Wengongling, Dashigou, Shijiawan, Taoyuan and Erdaohe, all of which are genetically related to carbonatite dykes except for the Shijiawan deposit which is associated with a granitic porphyry. The Yuantou carbonatite dykes intruded into Archean gneiss and other carbonatites emplaced into Mesoproterozoic volcanic and sediment rocks. The carbonatites are mainly composed of calcite and variable amounts of quartz and K-feldspar and minor molybdenite. Re–Os dating of molybdenite from the Yuantou carbonatite yields a weighted average age of 225.0 ± 7.6 Ma, consistent with the molybdenite age (221 Ma) from the Dashigou deposit. The rocks are characterized by high heavy REE (HREE) contents and consistent flat REE distribution patterns with La/Ybcn ~ 1. Quartz in the carbonatites from Yuantou and Dashigou deposits shows consistent O isotopes (8.1–10.2‰) similar to the associated calcite (7.2–9.5‰). The quartz and associated K-feldspar contain lower Zr, Hf and higher HREE abundances and negligible Eu anomaly relative to those from the granite porphyry in Shijiawan. Both minerals are primary products in the carbonatitic liquid, and not captured from the wall-rocks or crustal-derived silicate magmas, or a hydrothermal origin. Thus, the Huanglongpu carbonatitic liquids were enriched in Si and Mo, which may be produced by intensely fractional crystallization of non-silicate minerals.

关键词Carbonatites Fractional Crystallization Si-rich Carbonatitic Liquid Mo Mineralization Lesser Qinling Orogen
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.gyig.ac.cn/handle/42920512-1/9535
专题地球内部物质高温高压实验室
作者单位1.Laboratory of Orogenic Belts and Crustal Evolution, School of Earth and Space Sciences, Peking University, Beijing 100871, China
2.Laboratory for High Temperature & High Pressure Study of the Earth's Interior, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China
3.Engineering Research Center for Geologic Hazards Prevention, Guizhou Minzu University, Guiyang 550025, China
4.Department of Geology and Pedology, Mendel University of Agriculture and Forestry, Brno, Czech Republic
推荐引用方式
GB/T 7714
Wenlei Song;Cheng Xu;Liang Qi;Li Zhou;Linjun Wang;Jindrich Kynicky. Genesis of Si-rich carbonatites in Huanglongpu Mo deposit, Lesser Qinling orogen, China and significance for Mo mineralization[J]. Ore Geology Reviews,2015,64:756-765.
APA Wenlei Song;Cheng Xu;Liang Qi;Li Zhou;Linjun Wang;Jindrich Kynicky.(2015).Genesis of Si-rich carbonatites in Huanglongpu Mo deposit, Lesser Qinling orogen, China and significance for Mo mineralization.Ore Geology Reviews,64,756-765.
MLA Wenlei Song;Cheng Xu;Liang Qi;Li Zhou;Linjun Wang;Jindrich Kynicky."Genesis of Si-rich carbonatites in Huanglongpu Mo deposit, Lesser Qinling orogen, China and significance for Mo mineralization".Ore Geology Reviews 64(2015):756-765.
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