摘要
李梅锌矿床是渔塘超大型铅锌矿床的重要组成部分，是近年运用地洼学说预测，经初步验证查明的大型矿床。主要组分锌＞５％，铅很低。矿体主要赋存于下寒武统清虚洞组台地边缘藻礁灰岩相中，为同生构造组合、穹窿、北北东和北西西向地洼构造所控。属多因复成矿床，地台阶段主要是矿源层经压溶作用形成构造压溶热液成矿，在地洼阶段可能是渗流热液成矿，铅锌等成矿物质来自寒武纪碳酸盐围岩，主要成于低温。
The economically important Limei zine sulfide deposit of the Yutang massive lead and zine solfide deposit was predicted by the Diwa theory several years ago.The deposit is a polygenetic compound zine sulfide with the Zn content high(exceeding 5%) while the Pb content is very low.The main orebodies which occur in a platform margin algal reeflimestone of Qingxudong Formation(∈1q) are structurally controlled by the dome and diwa structures(NNE-and WNW-trending).During the platform stage,structural pressure solution mineralization occurred owing to the pressure-melting effect of the ore source bed and during the Diwa stage mineralization was vadose hydrothermal mineralization.Ore-forming metals(Zn,Pb) were derived primarily from the carbonate wall rocks.
出处
《大地构造与成矿学》
EI
CAS
CSCD
1995年第3期197-204,共8页
Geotectonica et Metallogenia
关键词
锌矿床
地质特征
成因
地洼学说
Limei,large polygenetic compound zine deposits,Diwa theory,prediction
