Discovery of the large-scale Huangtian scheelite deposit and implications for the structural control of tungsten mineralization in southeastern Yunnan, south China
Discovery of the large-scale Huangtian scheelite deposit and implications for the structural control of tungsten mineralization in southeastern Yunnan, south China
复制标题
滇东南地区黄田大型白钨矿矿床的发现及其对钨矿化的构造控制意义
DOI：
10.1016/j.oregeorev.2020.103480
复制
发表时间：
2020-03
影响因子：
3.3
通讯作者：
袁勇
中科院分区：
文献类型：
--
作者：
韩润生;任涛;李文昌;王雷;黄建国;黄仁生;袁勇
The large-scale Huangtian scheelite deposit represents one of the most important such deposits discovered recently in southeastern Yunnan, China. Results of the geological, metallotectonic, and geochemical investigations indicate that this deposit formed in a magmatic hydrothermal system during the Yanshanian period. Its deposition is controlled by the ore-hosted structure of a secondary fold and by interlayer faults (F0-1and F0-2), which are linked to the ore-guided structure of a secondary oblique strike-slip fault (F7) associated to the regional Maguan deep fault, and to an EW-trending tectonic zone that represents the main metallogenic tectonic system. The oblique strike-slip structure and the Tianchong granitic porphyries, located along the southern margin of the Laojunshan granite body, are primary ore-controlling structures, which directly controlled the movement of the ore-bearing fluid and its subsequent precipitation within the Huangtian scheelite deposit. The distribution of the orebodies is controlled by a group of metallogenic structural surfaces: the fold and fault systems, as well as a silicon-calcium surface. Silicification, fluoritization, and calcitization are the main hydrothermal alterations observed and exhibited a distinct alteration zonation. The hydrothermal mineralization process can be divided into three stages: the quartz-fluorite-(scheelite-tourmaline) stage, the scheelite-quartz-calcite- (fluorite) stage, and the calcite-pyrite-quartz-scheelite stage. The evolution of the mineralizing fluid proceeded as follows: medium-temperature and low-salinity fluid → medium- to low-temperature and low-salinity fluid → low-temperature and low-salinity fluid. The results concerning oxygen and hydrogen isotopic compositions demonstrate that the ore-forming fluids derived from a magmatic fluid mixed with a small amount of meteoric water. Overall, these features indicate that the Huangtian scheelite deposit represents a medium- to low-temperature magmatic hydrothermal deposit that is obviously controlled by the EW-trending tectonic zone. This study demonstrates the significance of such mineral exploration in similar geological regions.
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影响因子：
3.3
作者：
任涛;王彩艳;韩润生;黄建国;徐赛华
通讯作者：
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影响因子：
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通讯作者：
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DOI：
--
发表时间：
2013
期刊：
--
影响因子：
--
作者：
Lin Jian-kan
通讯作者：
Lin Jian-kan
DOI：
--
发表时间：
2013
期刊：
--
影响因子：
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作者：
Miao Ying-l
通讯作者：
Miao Ying-l