摘要
对云南金顶铅锌矿床虽有较多的研究,但还有不少地质问题需要再认识。硬石膏矿不是古新世陆相蒸发岩,而是三叠纪海相蒸发岩;主要容矿岩石之一的灰岩角砾岩,不是滑塌堆积角砾岩,而是膏溶—构造角砾岩;原划归云龙组(E_1)的地层有许多是其它时代的;矿区地层混乱是由构造所致,不能用沉积学观点解释;推覆构造应发生在古新世聚盐之后,推覆体滑动面有多个,硬石膏岩起润滑层作用。
The study of Jinding lead-zinc deposit has gone further, but some understanding of geological origin about the deposit needs reviewing. The anhydrite deposit is marine evaporite in Triassic, not continental evaporite in Paleocene epoch; the limestone-rubble rock,one of the main ore-holding rock, does not result from the devolution, but from the gypsum-solution and structural process. Not all geologic ages of the strata, which previously were thought to belong to the Yunlong formation ( E1 ), belong to Paleocene epoch. The disorder of the strata in the mining area is caused by the structural process, and can not be explained in terms of sedimentarism; the thrust faulting in the deposit occurred after the evaporation-sedimentation in Paleocene epoch. In the thrust faulting, there are many sliding faces, which are often composed of anhydrocks that act as lubricating layers.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
1989年第5期467-476,共10页
Earth Science-Journal of China University of Geosciences
关键词
铅锌矿床
硬石膏岩
蒸发岩
云龙组
brecciated anhydrock, marine evaporite, Yunlong formation, gyp-sum-solution structure breccia, thrust nappe
