摘要
本文介绍了川东—鄂西与毗邻地区二叠系上统吴家坪组黄铁矿床的特征、分布规律;阐述了成矿与海湾三角洲相有关;矿质主要来源于火山活动。探索了成因。
The pyrite deposit in Huangchangping,Jianshi appears stratified(in ore beds)or stratoid(in bedded vein)occurring at the lower part of Wujiaping Formation of the upper series of Permian System;the ore deposit distributes in accord with the elastic sandstones and tuffites in the ore—bearing sector,and is closely related to the carbonaceous siliceous rocks of the upper part of Maokou Formation of the lower series of underlying Permian System.The main minerogenie substances are derived from the volcanic activity;the formation of the ore deposit is controlled by both the lithofacies palaeogeography and lithological characters of the underlying strata(geochemical barrier)and belongs in the de- posit of sedimentary—diagenesis related with the intermediate—basic volcanic rocks.
关键词
磺厂坪
吴家坪组
岩屑砂岩
层凝灰岩
海湾三角洲相
地球化学梯度
沉积-成岩矿床
Huangchangping
Wujiaping Formation
Clastic sandstone
Tuffite(sed-tuff)
Bay delta facies
Geochemical gradient
Sedimentary diagenesis deposit
