西秦岭铅锌矿床的层控多样性与岩相、Ⅱ级构造单元控矿

通过系统归纳西秦岭铅锌矿床的赋矿地层、Ⅱ级构造单元控矿事实认为,矿床的层控多样性在矿田域表现为时控和岩相控矿,层、相、位控矿模式在矿田具有普遍性;在更大的区域上则主要表现为岩相和Ⅱ级构造单元控矿。板内环境下的拉张和陆内叠覆环境下的具走滑性质的俯冲分别形成了热水沉积型和沉积改造型铅锌矿床;沉积成矿期盆地的裂陷程度及改造成矿期沿深断裂活动的岩浆作用决定了铅锌矿床产出的Ⅱ级构造单元。控矿因素的地球化学表征为铁族元素、亲硫元素与亲石元素三位一体产出。

STRATABOUND VARIETY AND STRUCTURE CONTROLLING ORES OF ZINC-LEAD ORE DEPOSITS IN WEST QINLING

By systematically summing up the fact of ore-bearing strata,and 2nd order ore-controlling tectonic unit of zinc-lead ore deposits in west Qinling,we had a cognition in which the stratabound variety of ore deposit is characterized by both epoch-bound and lithoface-bound in the ore fields,and the lithofaces controlling ore and 2nd order tectonic unit controlling ore characterize the metallogenic law in larger region.The strentching within plate and incontinental subduction with strike-sliding in incontinental overprinted orogeny resulted in ore deposits of SEDEX type and reform ing type respectively. The split-sunk extent of basin during sediment mineralization and magmatism along deep faults during reform mineralization chosen the 2nd order tectonic unit where lead-zinc ore deposits occur.The Geochemistry of ore-controlling factors is characterized by the ferro group elements,sulphophile elements and alkline elements accumulating at some place.