摘要
云南哀牢山金矿带成因类型探讨１沈上越魏启荣程惠兰莫宣学（中国地质大学，武汉）一、金矿成因地质条件概述哀牢山是世界著名的构造岩浆带之一，目前已成为我国重要的黄金基地。云南哀牢山金矿带位于哀牢山洋脊／准洋脊火山岩－蛇绿岩带与墨江－绿春弧火山岩带之中（莫宣...
The Ailaoshan gold ore belt is confined to the low grade metamorphic rock belt intermediate between Jiujia Mojiang and Ailaoshan faults.The host rocks comprise intercontinental rift abyssal through type siliceous rocks and turbidites,and ophiolites as tectonic slices,the latter of which consist mainly of metamorphic peridotite(primitive mantle derived lherzolite and mantle depleted harzburgite),cumulus complexes(pyroxenite,gabbro,gabbro diorite,plagiogranite and stratified diabase),basic lavas(oceanic ridge pyroxene basalt and paraoceanic ridge albite basalt),and radiolaria bearing siliceous rocks.On the basis of tectonic settings,mineral sources and host rock series,referenced to the previous studies,the gold deposits(ore spots)in the belt are arranged into three distinct types,i.e.,the stratibound metamorphic hydrothermal type associated with turbidites (e.g.Donggualin and Jinchang gold deposits);the quartz vein type associated with gabbro diorite cumulates(e.g.Daping gold deposit),and the structural alteration type associated with oceanic ridge/paraoceanic ridge volcanic sedimentary rock series (e.g.Laowangzhai gold deposit).The present paper also deals with the characteristics and exploration prospects of the above mentioned types of gold deposits in the study area.
出处
《沉积与特提斯地质》
CAS
CSCD
1997年第21期75-86,共12页
Sedimentary Geology and Tethyan Geology
