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海南琼华−莲塘断裂带第四纪活动特征
中国地质科学院地质力学研究所,北京 100081
自然资源部活动构造与地质安全重点实验室,北京 100081
中国地质调查局新构造与地壳稳定性研究中心,北京 100081
中图分类号: P553
Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China
Key Laboratory of Active Tectonics and Geological Safety, Ministry of Natural Resources, Beijing 100081, China
Research Center of Neotectonism and Crustal Stability, China Geological Survey, Beijing 100081, China
图1琼北地区活动断裂分布图
F1—琼华–莲塘断裂带,F1-1—五源河−道心村断裂,F1-2—永庄水库断裂,F1-3—海口砖瓦厂断裂,F2—长流−仙沟断裂带,F3—马袅–铺前断裂带,F4—老城−西秀断裂带,F5—儒关村−云龙断裂带a—琼北地区构造纲要图;b—琼北地区主要活动断裂分布图
Figure1.Map of active faults in northern Hainan
(a) Sketch map of northern Hainan; (b) Map of main active faults in northern Hainan F1–Qionghua–Liantang fault belt; F1-1–Wuyuanhe–Daoxincun fault; F1-2–Yongzhuangshuiku fault; F1-3–Haikouzhuanwachang fault; F2–Changliu–Xiangou fault belt; F3–Maniao–Puqian fault belt; F4–Laocheng–Xixiu fault belt; F5–Ruguancun–Yunlong fault belt
图2琼华–莲塘断裂带剖面与地球物理测线及钻孔分布图
a—海口砖瓦厂断层剖面、浅层人工地震测线以及钻孔分布图;b—永庄水库高密度电阻率法测线分布图;c—琼华村钻孔分布图
Figure2.Profile of the Qionghua–Liantang fault belt and distribution of geophysical survey lines and boreholes
(a) Profile of the Haikouzhuanwachang fault section and distribution of shallow artificial seismic lines and boreholes; (b) Distribution of high-density geophysical survey lines using the electrical method along the Yongzhuangshuiku fault; (c) Borehole distribution in Qionghua village
图3海口砖瓦厂断裂特征
a—海口砖瓦厂断层剖面;b—海口砖瓦厂断层剖面图; c—F1-3b断层垂直错距0.5 m;d—F1-3a断层垂直错距1.1 m;e—OSL样品采样点;f—F1-3a断层擦痕特征;g—沿F1-3a断层形成的地层牵引变形;h—沿F1-3a断层面发育的铁质结核
Figure3.Characteristics of the Haikouzhuanwachang fault
(a) Picture of the Haikouzhuanwachang fault section; (b) Schematic diagram of the Haikouzhuanwachang fault section; (c) Characteristics of the secondary fault (F1-3b); vertical offset of this fault is 0.5 m; (d) Characteristics of the secondary fault (F1-3a); vertical offset of this fault is 1.1 m; (e) OSL sampling location; (f) Characteristics of fault slickenside in F1-3a; (g) Characteristics of stratum deformation; (h) Iron concretion along the F1-3a surface
图4五源河–道心村断裂高密度电阻率法勘探剖面
a—视电阻率断面图;b—高密度电阻率法剖面解译结果
Figure4.Exploration profile of the Wuyuanhe–-Daoxincun fault using high density resistivity
(a) Apparent resistivity section; (b) Interpretation results using high density resistivity
图5海口砖瓦厂断裂浅层人工地震勘探剖面
a—浅层人工地震勘探剖面;b—浅层人工地震勘探剖面解译结果
Figure5.Exploration profile of the Haikouzhuanwachang fault using shallow artificial seismic reflection
(a) Exploration profile of the shallow artificial seismic reflection; (b) Interpretation results of the shallow artificial seismic exploration profile
图6琼华村钻孔剖面
Figure6.Geological section of the composite drilling across the Qionghua–Liantang fault in Qionghua village
图7海口砖瓦厂钻孔联孔剖面
Figure7.Geological section of the composite drilling in the Haikouzhuanwachang fault