摘要
河南省内地洼型造山经历了汇聚型到离散型的转换，造成早期断裂的重新活动，并引起燕山期重熔型花岗岩浆活动，控制了金矿成矿的时空分布（过渡际成矿作用），形成了45个Ⅳ级大地构造单元。金矿受层位控制明显，前地洼阶段的金矿化使金在一些地质体中初步富集。地洼阶段的（叠加）金矿化主要发生在离散型的地洼型造山过程中，对省内金的工业矿床的形成起到决定作用。燕山期重熔型花岗岩浆活动和不同型式、不同规模、不同期次的构造活动是金矿成矿的必要条件。分析了金矿床的形成机制，并指出了找金的有利地区。
Diwa-type orogeny in Henan province had gone through the transition from convergent type to divergent one, which caused the early-formed fracture to be activated again and Yanshanian re-melted-type granite magmatism and controlled the time-space distribution of gold metallogeny (transition span metallogeny), with 45 IV -class tectonic units formed. The gold deposits are controlled by strata apparently. The gold mineralization in pre-diwa stages made gold richened preliminarily in some geological bodies. The gold (superposition) mineralization in diwa stage played a decisive part in the formation of economically valuable gold deposits. The Yanshanian re-melted-type granite magmatism and tectonic activity of various modes, scales and periods are necessary conditions to the gold metallogenesis. The gold metallogenetic mechanism was studied and the favourable region for gold-prospecting was pointed out.
出处
《大地构造与成矿学》
EI
CAS
CSCD
1998年第4期301-308,共8页
Geotectonica et Metallogenia
关键词
地洼学说
地洼型
造山运动
地穹
成矿
金矿床
Diwa theory, crustobody, diwa-type orogeny, geodome, diwa, goldmetallogeny
