四、“勉略宁”铁、铅、锌、金、银、镍、石棉成矿带位于本省西南部勉县、略阳、宁强一带,北界略阳—褒城断裂.南抵阳平关—洋县断裂。大地构造位置隶属于摩天岭加里东褶皱带。(一)地质概况出露地层主要是中上元古界碧口群变质火山—沉积岩和震旦系碎屑岩—碳酸盐岩.它们都是我省重要的含矿地层。侵入岩主要有两期.一为加里东期超基性岩和基性岩、一为华力 Four, “Mian Laining” iron, lead, zinc, gold, silver, nickel, asbestos mineralization belt is located in southwestern Mian County, Lueyang, Ningqiang area, the northern boundary of Lueyang - Pao Cheng fault. - Yangxian fault. The structure of the earth is subordinate to the Motian Ridge Caledonian fold belt. (I) Geological Profile The exposed strata are mainly Meso-Upper Proterozoic Bikou Group metamorphic volcano-sedimentary rocks and Sinian clastic rocks-carbonate rocks, all of which are important ore-bearing formations in our province. There are two main intrusive rocks: one is the Caledonian ultramafic rocks and basic rocks, and the other is Huali