Metallogenic ages and sulfur sources of the giant Dahutang W–Cu–Mo ore field, South China: Constraints from muscovite 40Ar/39Ar dating and in situ sulfur isotope analyses
Metallogenic ages and sulfur sources of the giant Dahutang W–Cu–Mo ore field, South China: Constraints from muscovite 40Ar/39Ar dating and in situ sulfur isotope analyses
复制标题
华南大湖塘瓦铜钼巨型矿田成矿年龄及硫源：白云母40Ar/39Ar定年及原位硫同位素分析的制约
DOI：
10.1016/j.oregeorev.2021.104141
复制
发表时间：
2021-03
影响因子：
3.3
通讯作者：
Xiang X.K.
中科院分区：
文献类型：
--
作者：
Fan X.K.;Hou Z.Q.;Zhang Z.Y.;Mavrogenes J.;Pan X.F.;Zhang X.;Xiang X.K.
大湖塘钨铜钼矿田是世界上最大的钨矿田之一。大湖塘主要发育脉状浸染型、热液角砾岩型和粗石英脉型成矿3种类型。通过对石门寺和石卫东矿床白云母40Ar/39Ar精确年龄和硫化物系统原位硫同位素组成的研究，确定了大湖塘矿田热液角砾岩型和粗石英脉型矿化的成矿年龄、成矿侵入体、矿化中硫的来源和构造背景。白云母40Ar/39Ar精确定年表明，石门寺矿床的热液角砾岩形成于142.0±0.6 Ma，由黑云母花岗斑岩（BGP）引发；石卫东矿床的粗石英脉型成矿形成于136.1±0.5 Ma，由粗粒斑岩二云母花岗岩（CPTG; 144.2 ~ 137.5 Ma）早期形成，受CPTG晚期（130 ~ 128 Ma）破坏。硫化物原位硫同位素组成表明，热液角砾岩型和粗石英脉型矿化的硫同位素组成范围较窄（−3.38‰~ +0.39‰），表明硫化物为岩浆成因。从早期到晚期硫化物中硫同位素的增加可能是由于热液角砾岩矿物系统中成矿流体氧逸度降低所致。大湖塘主要的W-Cu-Mo成矿事件发生在146 ~ 136 Ma区间，仅与早期岩浆活动（149 ~ 138 Ma）有关，与邻近的长江中下游成矿带（148 ~ 135 Ma）的Cu-Au-Mo-Fe矿物体系吻合较好。而晚期岩浆作用期（138 ~ 128 Ma）一般在钨多金属成矿作用后侵位，甚至以无矿侵入体的形式破坏早期形成的矿体。结合区域构造演化，认为大湖塘矿田的钨铜钼矿化和成矿花岗岩形成于挤压向伸展过渡时期。
The giant Dahutang W–Cu–Mo ore field is one of the largest tungsten ore fields worldwide. Three main types of mineralization are developed at Dahutang, comprising veinlet-disseminated, hydrothermal breccia, and coarse quartz vein-type mineralization. In this study, precise muscovite 40Ar/39Ar ages and systematic in situ sulfur isotope compositions of sulfides from the Shimensi and Shiweidong deposits were presented to determine the ore-forming ages and mineralizing intrusions of the hydrothermal breccia type and coarse quartz vein-type mineralization, sources of sulfur in the mineralization, and tectonic setting of the Dahutang ore field. The precise muscovite 40Ar/39Ar dating suggested that the hydrothermal breccia in the Shimensi deposit formed at 142.0 ±0.6 Ma and was triggered by the biotite granite porphyry (BGP), while the coarse quartz vein-type mineralization in the Shiweidong deposit formed at 136.1 ±0.5 Ma and was caused by an early episode of coarse-grained porphyritic two-mica granite (CPTG; 144.2–137.5 Ma) and destroyed by the late episode of CPTG (130–128 Ma). The in situ sulfur isotope compositions of sulfides showed that the hydrothermal breccia type and the coarse quartz vein-type mineralization had a narrow range of sulfur isotope compositions (−3.38–+0.39‰), implying a magmatic origin for sulfur. The increased sulfur isotopes in the sulfides from early to late stages were probably caused by a reduction in the oxygen fugacity of ore-forming fluids in the hydrothermal breccia mineral system. The main W–Cu–Mo mineralization event at Dahutang occurred in the 146–136 Ma interval and was only associated with the early episode of magmatism (149–138 Ma), which coincided well with the Cu–Au–Mo–Fe mineral system in the neighboring Middle–Lower Yangtze River Metallogenic Belt (148–135 Ma). The late episode of magmatism (138–128 Ma), however, was commonly emplaced after the tungsten polymetallic mineralization and even destroyed early formed orebodies as ore-barren intrusions. Combined with the regional tectonic evolution, we proposed that the W–Cu–Mo mineralization and ore-related granites in the Dahutang ore field formed in a transitional setting from a compressional regime to an extensional regime.
登录
查看更多内容
影响因子：
5.3
作者：
STEIGER, RH;JAGER, E
通讯作者：
JAGER, E
华南赣北皖南地区和赣南地区含钨花岗岩及相关矿化对比研究
DOI：
10.1007/s11430-016-9071-6
发表时间：
2017-07
期刊：
SCIENCE CHINA: Earth Sciences
影响因子：
--
作者：
苏慧敏;蒋少涌
通讯作者：
蒋少涌
影响因子：
1.8
作者：
Zhou Tao-fa;Wang Shiwei;Yuan Feng;F. Yu;Zhang Dayu;Chang Yinfo;N. White
通讯作者：
Zhou Tao-fa;Wang Shiwei;Yuan Feng;F. Yu;Zhang Dayu;Chang Yinfo;N. White
影响因子：
3.8
作者：
Xiaolei Wang;Jincheng Zhou;J. Qiu;W. Zhang;Xiaoming Liu;G. Zhang
通讯作者：
Xiaolei Wang;Jincheng Zhou;J. Qiu;W. Zhang;Xiaoming Liu;G. Zhang
影响因子：
1.8
作者：
C. Wen;Zhan Yan
通讯作者：
C. Wen;Zhan Yan