【作者】 李光勋；

【Author】 Li Guangxun (Yunnan Institute of Geological Sciences)

【机构】 云南省地质科学研究所；

【摘要】 <正>一、矿区地质概况分布于老王寨金矿床周围的地层是一套浅变质的板岩、石英杂砂岩夹碳酸盐岩、熔结角砾岩和层凝灰岩海相火山碎屑岩系,属扬子地台边缘凹陷带的类复理石沉积,具有浊流沉积的特征,矿区内划分五个岩性段,过去因缺乏化石依据而统称为上古生界或下、中志留统。笔者在第一岩性段中部采获大量的牙形石,经董致中鉴定可划分两个化石带,时代更多还原

【Abstract】 The Laowangzhai gold deposit in Ailaoshan Mt.is hosted in low-grade metamorphic rocks of Late Paleozoic,which consist of metamorphosed are- naceous slate,graywacke and marine-facies volcaniclastics.The magmatic activities are stronger in this area,and basic and ultrabasic rocks are especia- lly developed.It has first been confirmed that this orefield is located on nearly E-W-trending Laowangzhai Anticline disruped by many faults.更多还原