摘要
南秦岭三叠系裂陷槽主要分布在合作—宕昌—两当大断裂与腊子口—舟曲—成县大断裂之间,向东伸入陕西界内,向西延伸到青海省,以甘肃陇南相关三叠纪地层研究程度最高。其北界为传统意义上中秦岭与南秦岭的分界线,沿此断裂构造带目前已发现有众多的多金属矿点及矿化点。南界属于著名的白龙江背斜的北翼,沿此断裂构造带最近也不断发现了一系列金矿及矿化异常线索,尤以甘肃西和大桥大型金矿的发现最为典型。综合研究发现南秦岭三叠纪裂陷槽内三叠系地层两侧的断裂边界带具备多金属成矿的大量依据,且以构造带内热卤水成矿类型为主。
Triassic aulacogen in South Qinling is located between Hezuo-Tanchang-Liangdang fault and Lazikou-Zhouqu-Chengxian fault,extending eastward into Shanxi Province,westward into Qinhan Province.Traditionally,the northern margin of this fault zone is deemed as the boundary between Middle Qinling and South Qingling,along which a lot of multi-metal ore occurrences and mineralized points were discovered.The southern margin is the northern limb of Bailongjiang anticline,along which there are a series of gold deposits and mineralization anomalies,especially,Daqiao gold deposit in Xihe County is the most typical in the region.The evidences of some multi-metal deposits supports that the deposits in the tectonic belt mainly are fallen into metallogenetic type of brine water.
出处
《甘肃地质》
2011年第3期60-65,共6页
Gansu Geology
基金
甘肃省武都幅1:25万区域地质调查项目研究成果
