陕西省凤县老湾沟地区金矿成矿背景与找矿新认识

New Discoveries for the Metallogenic Background and Prospecting of Gold Deposit in Laowangou Area,Fengxian County,Shaanxi Province

陕西省凤县老湾沟地区大地构造位置位于北秦岭造山带和礼县-柞水褶皱带的接合部位,地处唐藏-丹凤-商南大断裂带凤县段,是秦岭中西段有色、贵金属资源集中区。本文通过对区域和该区地层、构造、矿化蚀变特征及找矿新发现进行分析,认为该区控矿构造为近东西向韧-脆性剪切带,南北向含矿构造则为剪切带内的雁列脉式张裂隙含矿构造。

The geotectonic location of Laowangou area in Fengxian County,Shaanxi Province is located at the junction of the North Qinling Orogenic Belt and Lixian-Zoshui Fold Belt.It is situated in the Fengxian section of the TangZang-Danfeng-Shangnan large fault zone,which is a concentrated area of Non-Ferrous and precious metal resources in the central-western parts of the Qinling Mountains.Based on the analysis of the stratigraphy,structure,mineralization alteration characteristics and new discoveries of prospecting in the region and the area,it is concluded that the ore-controlling structure in the area is nearly east-west ductile brittle shear zone,and the north-south ore-bearing structure is the en echelon vein type tension fissure ore-bearing structure within the shear zone.