摘要
湖南西北部龙山 -桑植铅锌矿带的菱锌矿床 ,主要赋存于寒武系上统耗子沱群第 3段和奥陶系下统南津关组底部的“硅化体”与纯灰岩接触面附近 ,为以菱锌矿为主、异极矿其次的氧化锌矿床。矿体呈似层状、透镜状、似脉状等 ,主要产于硅化体下部或其沿倾斜延伸位及其尖灭处。具原地或准原地堆积 (主要 )和异地迁移 (次要 )特征。地下水通过层间裂隙、断裂裂隙渗入矿化层及围岩 ,在溶蚀、氧化 -水解作用下形成的菱锌矿床 ,属古岩溶型矿床类型。
The smithsonite deposits of longshansangzhi lead-zine zone in northwestern Hunan are located in Haozitue group of upper Cambrian system and bottom party of Nanjianguan fromation of lower Ordovician system. The deposits mainly occur lower part at silicified bodies or along dipping extent and die out of karst cave. They consist of autochthonous, pene-autochthonous cumulate(mainly) and allochthonous deposits. When underground water ran through interlayer fissures and fault fissures, it permeated into mineralized bed, wall rock. And then having undergone dissolution, oxidation, and hydrolysis, the deposits were formed, which belong palaeo-karst type deposit.
出处
《湖北地矿》
2003年第2期8-12,共5页
Hubei Geology & Mineral Resources
