摘要
广西凤山县久隆金矿产出于晚古生代碳酸盐岩隆起边缘,分布于二叠系和三叠系接触带碎屑岩一侧,矿体呈陡立的透镜状、似层状产于断裂中。上二叠统碳酸盐岩与中三叠统陆源碎屑岩之间,发育典型的古岩溶沉积不整合构造,后期断裂构造叠加、复合在不整合面上,形成高龙式微粒型金矿。该矿床以沉积间断面为基础,叠加、复合后期构造,产于沉积间断面之"上"的断裂构造带中,以构造为主要控矿因素,沉积间断面为重要控矿因素,受断控与层控等多重因素复合控制,经多期构造活动叠加形成,可称之为沉积间断断面型金矿。滇黔桂"金三角"应从不同控制因素和产出模式形成于同一地质作用的背景出发,考虑层控与断控等多重因素复合、叠加对成矿的控制作用,构造叠加、复合部位是寻找复合型矿床、原生矿和深部隐伏矿床的重点。
Jiulong gold deposit,located in Fengshan county of Guangxi,occurres at the edge of late Paleozoic carbonate platform uplift.The orebody is found in the clastic rock along the contact of Triassic and Permian,showing dipping lens and bedded in the faults.In deposit area,unconformity is developed between the carbonate of Permian and the clastic rock of Triassic,typical paleokarst structure.The unconformity,overprinted by late faults,combined with paleokarst and other geologic factors,results in the formation of Jiulong gold deposit.Most gold deposit concerned with the discontinuities in northwest Guangxi has similar genesis.These gold deposits in the discontinuities and the overprinting of faulting and deformation are controlled by many geologic factors.Based on this mineralization model,the prospecting in the gold triangle area bounded by Yunnan,Guizhou,and Guangxi is proposed.Strata,fault,deformation,paleokarst are ore-controlling factors.Among them,the paleokarst,as sedimentary discontinuities,is the most important one.It is the primary factor for prospecting new hidden gold deposits in this area.
出处
《桂林理工大学学报》
CAS
北大核心
2011年第4期488-494,共7页
Journal of Guilin University of Technology
基金
广西自然科学基金项目(40372058)
中国地质调查局项目(基[2010]矿评01-14-02)
广西地质工程中心重点实验室系统性研究课题(11-031-20-3)
关键词
沉积间断断面型金矿
古岩溶
不整合面
层控
断控
久隆金矿
sedimentary discontinuity-fractured type gold deposit
paleokarst
plane of lunconformity
stratabound
fault-bounded
Jiulong gold deposit
