秦岭沉积岩容矿型金矿的控矿条件与找矿方向

秦岭地区沉积岩包括从扬子地台北缘的志留纪裂陷沉积到晚古生代被动大陆边缘断陷—坳陷盆地沉积和三叠纪裂陷沉积。现有勘查资料表明，秦岭地区沉积岩容矿型金矿大多集中在泥盆系和三叠系，少量分布在志留系、石炭系和二叠系。地质地球化学研究表明，该区沉积岩容矿金矿类型有细碎屑岩容矿的变形变质动热改造型、碎屑岩薄层灰岩容矿的韧性剪切带型、钠长角砾岩钠长板岩容矿的热水喷流型、碎屑岩碳酸盐岩容矿的浅成低温热液（ 热泉） 型和含碳泥质岩容矿的推覆构造型５ 种。该区金矿控矿条件为盆地边缘隆起带控矿、热隆起周边剥离断层系统控矿、不同岩性界面的推覆构造及剪切构造控矿和多期活动的深大断裂控矿

SEDIMENTS-HOSTED GOLD DEPOSITS IN QINLING: METALLOGENIC TYPES, ORE-CONTROLLING FACTORS AND PROSPECTING

The sedimentary rocks in the Qinling area are concerned with Silurian rifting sediments on the northern margin of Yangtze River Platform, late Paleozoic sediments in faulting and depression basin on passive continental margin and Triassic rifting sediments. The sediments-hosted gold deposits are mainly hosted in Devonian and Triassic, secondly in Silurian, Carboniferous and Permian. The metallogenic types are classified as the fine clastic rocks-hosted one formed by deformation, metamorphism and hydrothermal reformation,the clastic rocks and limestone-hosted one related to ductile shear zone, albite breccia and albite slate-hosted one formed by thermal exhalation, epithermal one hosted in clastic rocks and limestone and carboniferous and argillic rocks-hosted one related to nappe structure. The ore-controlling factors are attributed into rise on the margin of basin, detach faults around the thermal rise, nappe structure on the interface of different lithology, shear structure and multi-phased deep faults.