西秦岭显生宙构造演化与成矿旋回

西秦岭显生宙大地构造演化经历了早古生代裂谷系→晚古生代早期扩张、稳定沉积和成矿→晚古生代晚期会聚收缩→中生代闭合造山四个重要发展阶段。西秦岭铅锌矿成矿作用包括加里东准备期旋回、海西早期成矿期旋回、海西晚期富集期旋回和印支期改造迭加期旋回。成矿金属元素来源于地壳深处或上地幔的热液对流房，经断裂构造作用而喷流，在适宜的物理化学环境下，形成喷流－沉积矿床。

PHANEROZIC TECTONIC EVOLUTION AND MINEROGENETIC CYCLE IN THE WESTERN QINLING RANGE

Phanorozoic tectonic evolution in the Western Qinling range should be derived from 4 large stages:early Palaeozoic rift system, incipient period of late palaeozoic spreading-stable sedimentary and minerogenetic stage, later convergent contract stage and mesozoic close orogehic stage. The lead-zinc matallogenic cycles in the area include four:caledonian preparative cycle, early Hereynian metallogenic cycle, late Hereynian enrichemet cycle and Indosinian reformed-overlapped cycle. The ore-formed metal steam from hydrothermal convertive cell in earth crust and from the metallogenic hydrothermal nuid are exchaleted though the fault passway and formed sedex deposits under suitable physicochemical conditons.