摘要
在海南岛东南部吊罗山-陵水县地区完成的1∶5万区域地质调查,通过地层学的综合研究,将区域地层划分为5个岩石地层单位(包括1个非正式地层单位);新获得9件侵入岩LA-ICP-MS锆石U-Pb年龄,为建立区域岩浆岩的时空格架和反演演化过程提供了新的资料;通过地球化学对比,首次将调查区内早白垩世保亭杂岩体确定为C型埃达克质岩石,为区内燕山晚期花岗岩找矿提供基础地质资料;首次发现和厘定出北东向芒三水库-长丰韧性变形带,并对变形带的岩石学特征、变形特征、运动学特征等进行了初步研究;新发现稀土矿床1处、矿化点10个,圈定4个成矿预测区,为下一步开展地质找矿提供了靶区;调查了区内地质灾害类型及分布特征,探讨了地质灾害的形成条件和诱发因素;对区内旅游资源进行了概略调查。
During 1：50 000 regional survey in Diaoluoshan area, Lingshui County, southeastern Hainan province, we subdivided the regional stratigraphic system into five lithostratigraphic units （include one informal lithostratigraphic unit） through integrated study of stratigraphy. Obtainment of nine new zircon LA-ICP-MS U-Pb ages of intrusions offered new information for establishing the evolving process and spa- tio-temporal fi＇amework of the magrnatic rocks. Early Cretaceous Baoting complex is defined as C-type adakite by geochemical research, which provides basic geological information to search for mineral deposits in Late Yanshanian granite in this area. The petrological, deformation and kinematic features of deformable zone of newly discovered NE-trending Mangsan Reservior-Changfeng ductile shear zone are studied in detail. One rare earth deposit and ten ore occurrences are discovered in this geological survey, and four metallogenic prog- nosis areas are pointed out for further geologic prospecting. The types and distributing character of geological hazards are investigated, and the formation mechanism and inducement of which are also discussed.
出处
《华南地质与矿产》
CAS
2011年第4期335-341,共7页
Geology and Mineral Resources of South China
基金
中国地质调查局国土资源大调查项目(编号:1212010710716)
关键词
地层划分
锆石U—Pb测年数据
C型埃达克质岩
韧性变形带
海南吊罗山
stratigraphic division
zircon U-Pb dating
C-type adakite
ductile shear zone
regional geological survey
Diaoluoshan area, Hainan Island
