The δ30Si and δ18O of the cherts from the Gacun Kuroko-type deposit were determined for the first time and have been compared with those of the silica chimneys from modern seafloor hy-drothermal fields.
本文首次报道了川西呷村黑矿型矿床硅质岩的硅、氧同位素组成,其δ~(18)O为12。
The Gacun kuroko-type deposit in western Sichuan is distributed in the inter-arc rift zone within the Triassic Yidun island arc and occurs in the upper part of the rhyolitic volcanic rocks in bimodal suite.
川西呷村黑矿型矿床产于酸性流纹质火山岩系上部。
Nests of tungsten ore with various shapes, sizes can often be found in the granite associated with quartz vein tungsten deposits.
地质和实验资料表明,此类花岗质岩浆体系中不仅存在液态分离作用形成熔离矿化囊包体,而且熔离成因的黑钨矿矿囊可作为岩体可以形成岩浆热液钨矿的标志,同时说明石英脉型黑钨矿床的剥蚀深度较大。