THE METALLOGENETIC CONDITION OF THE GOLD DEPOSITS IN LIMIN AREA

摘要

Two large scale and more than ten medium-small gold deposits have been discovered and proved mainly in Lixian County, Gansu Province, since the early 1980'. The regional geology setting, the ore-bearing rock series, the structure controlling for mineralization, the magmatic controlling for mineralization and the metallogeny of the deposits have been represented. The main conclusions were that the gold deposits in Limin gold belt are conrolled by tectonic-magmatite zone, the ore-forming materials come from sedimentary series, the metallogenetic fluid originates from meteoric water, the mineralization is multiply controlled by faults. The genetic type belongs to the underground thermal water leaching gold deposit.