新疆托里萨Ⅰ金矿床的地质特征及成因研究

新疆托里萨I金矿床产于托里蛇纹岩套的超镁铁岩相内,与超镁铁岩的蚀变交代作用有关.矿床地球化学研究表明该矿床的形成与海底热泉活动有关,是一种新的金矿床类型.

STUDY ON THE GEOLOGICAL CHARACTERISTICS AND ORIGIN OF SARTOHAY-I GOLD DEPOSIT IN TUOLI COUNTY, XINJIANG

Being a new kind of gold deposit, the gold deposit related to carbonatized ultramafic rocks has been noticed. Taking the sartohay-I gold deposit as an example, the mineralization characteristics and origin of this deposit is discussed in this paper. The mineralized ultramafic rock is a part of Tuoli ophiolite. The gold orebodies occurred in carbonatized altered rocks of ultramafites. The petrochemistry, trace elements and REE of the altered rocks are similar to those of the ultramafites The gangue minerals in the ores, e.g. quartz, calcite, dolomite, and ore minerals, e.g. pyrite, chalcopyrite, gersdorffite, have their own characteristics.The compositions of sulfur isotope in the ores indicated that the sulfur came from mantle. The ore-forming fluid of the deposit is the meta-hydrothermal mixture of sea-water with igneous water according to the features of hydrogen and oxygen isotopes. Consequently, it could be said that the forming of this gold deposit is related to the activity of sea-floor hot-spring.