华东南地区铀矿区域控矿断裂构造遥感解译及其重磁场特征
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摘要
利用遥感图像对华东南地区开展了区域断裂构造解译,发现了3条新断裂,分别是近东西向的醴陵-龙泉断裂,北西西向通道-龙川断裂和永福-佛岗断裂。笔者前期研究表明这3条断裂对地表岩石和铀矿田的分布均有明显的控制作用,属大型断裂。通过布格重力异常和磁异常进一步分析,发现通道-龙川断裂和永福-佛岗断裂具有明显的重力异常和磁异常,深部断裂特征明显,认为应归属深大断裂;而醴陵-龙泉断裂只是中段具有磁异常反应,是否为深大断裂有待进一步研究。
Remote sensing image was used to interpret the frame structure in Southeastern China, and three large faults was newly identified: there are EW strike Liling-longquan fault; NWW Strike Tongdao-Longchuan fault and Yongfu-Fogang fault. The authors verified that the three faults are large fault and has significantly effects on the distribution of rock outcrop and uranium ore-filed. Gravity and magnetic data were used to study the deep extension feature of the three faults. It was found that Tongdao-Longchuan and Yongfu-Fogang faults produced wholly significant gravity and magnetic anomalies which respondent to the deep fault obvious, while Liling-Longquan fault only showed local anomaly in its middle segment.Therefore, Tongdao-Longchuan and Yongfu-Fogang fauls were regarded as large-deep faults, the deep feature of Liling-Longquan fault need more study to validate.
Remote sensing image was used to interpret the frame structure in Southeastern China, and three large faults was newly identified: there are EW strike Liling-longquan fault; NWW Strike Tongdao-Longchuan fault and Yongfu-Fogang fault. The authors verified that the three faults are large fault and has significantly effects on the distribution of rock outcrop and uranium ore-filed. Gravity and magnetic data were used to study the deep extension feature of the three faults. It was found that Tongdao-Longchuan and Yongfu-Fogang faults produced wholly significant gravity and magnetic anomalies which respondent to the deep fault obvious, while Liling-Longquan fault only showed local anomaly in its middle segment.Therefore, Tongdao-Longchuan and Yongfu-Fogang fauls were regarded as large-deep faults, the deep feature of Liling-Longquan fault need more study to validate.
引文
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[3]唐湘生,聂斌,李嘉.武夷山成矿带铀成矿特征与找矿方向[J].铀矿地质,2011,27(2):129-138.
[4]邵飞.钦杭成矿带北东段火山岩型铀矿定向三等距分布规律及成矿预测[J].铀矿地质,2011,27(5):286-292.
[5]何友宇,姜必广,刘邵强,等.苗儿山北段深冲矿区成矿断裂构造地球化学特征及找矿预测[J].国土资源导刊,2015,(4):40-45.
[6]唐相生,王圣祥.华东铀成矿规律研究[J].铀矿地质,2000,16(5):265-271.
[7]李祖武.中国东部北西向构造[M].北京:地震出版社,1992:61-64.
[8]冯希杰.中国大陆北西-北北西向断裂系统与强震[J].西安地质学院学报,1988,(3):47-55.
[9]张虎男.闽粤一带沿海地区北西向断裂的活动性[J].地震地质,1982,(3):17-25.
[10]姜端午,李大明,李文辉.湖南省北西向构造的遥感地质特征[J].湖南地质,2000,(4):229-232.
[11]万聚金.浅谈湘南地区北西向构造及其控岩控矿作用[J].湖南地质,1993,(1):13-18.
[12]潘蔚,余长发,韩晓青,等.华东南地区北西向断裂及其与铀矿田定位关系探讨[J].世界核地质科学,2016,33(2):63-67.
[13]王笋,丘学林,赵明辉,等.闫培等长乐-南澳断裂带两侧地壳结构差异的地震-重力联合反演[J].地球物理学报,2017,60(10):2853-3862.
[14]黎春化.从重、磁场区域特征分析华南东部地壳结构[J].华东地质学院学报,1993,16(4):413-419.
[15]金宠,钱俊锋,周乐尧,等.重磁异常揭示的浙江构造体系及岩石圈脱耦[J].科技通报,2015,31(1):27-33.
[16]任镇寰,李健梅,乔计花,等.广西灵山地区深部断裂系统的重力资料解释[J].华南地震,2012,32(2):1-8.