He Hujun, Tian Hongxu, Han Ke, Yang Xingke, Zhao Yichen, Chao Huixia
School of Earth Science and Resources, Chang'an University, Xi'an, 710054, China.
Key Laboratory of Western Mineral Resources and Geological Engineering, Ministry of Education, Chang'an University, Xi'an, 710054, China.
Sci Rep. 2024 Jul 16;14(1):16440. doi: 10.1038/s41598-024-67432-9.
The study of the fluid inclusions of W-Mo deposits in the mineralization area of Ningshan-Zhen'an , Shaanxi Province, China shows that the gas-liquid two-phase inclusions are mainly present in W-Mo deposits, and the ore-forming fluid can be divided into four types: high-temperature type, middle-high-temperature type, middle-temperature type and low-temperature type. The formation depths of the W-Mo mineralization range from 4.2 to 8.4 km. The boiling and mixing of fluid may have been important mechanisms for the formation of W-Mo mineralization. The skarn-type mineralization is dominated by magmatic water, the quartz-vein-type mineralization includes both magmatic water and meteoric water, and the meteoric water is more involved in the quartz-fluorite-vein-type, beryl-quartz-vein-type and pegmatite-type mineralization. Magma is the main source of sulfur; that is, magma is the main source of mineralization. Combined with the metallogenic setting and geological characteristics of typical ore deposits, in the process of structural system transformation in South Qinling, the ore-forming magma fluid in the Late Indosinian-Yanshanian period was uplifted and emplaced along the NW-WNW direction and NE-NNE direction, and eventually, NW-WNW fault-controlled skarn-type W-Mo mineralization and quartz-vein-type W-Mo deposits accompanied by greisenization, albitization and potash feldspathization formed.
对中国陕西省宁陕—镇安矿化区钨钼矿床流体包裹体的研究表明，气液两相包裹体主要存在于钨钼矿床中，成矿流体可分为高温型、中高温型、中温型和低温型四种类型。钨钼矿化的形成深度为4.2至8.4千米。流体的沸腾和混合可能是钨钼矿化形成的重要机制。矽卡岩型矿化以岩浆水为主，石英脉型矿化既有岩浆水又有大气降水，大气降水更多地参与了石英萤石脉型、绿柱石石英脉型和伟晶岩型矿化。岩浆是硫的主要来源，即岩浆是矿化的主要来源。结合典型矿床的成矿背景和地质特征，在南秦岭构造体系转换过程中，印支晚期—燕山期成矿岩浆流体沿NW—WNW向和NE—NNE向上升侵位，最终形成NW—WNW断裂控制的矽卡岩型钨钼矿化以及伴有云英岩化、钠长石化和钾长石化的石英脉型钨钼矿床。
