利用重磁震资料解释推断东海海底火成岩
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摘要
利用1∶100万上海幅海洋区域地质调查项目最新获得的重力、磁力和多道地震数据,根据研究区内重、磁场特征,以及已知的火成岩发育状况,在数据处理的基础上,通过剖面和平面相结合,对东海海底的火成岩进行了推断解释,从而得到火成岩在空间上的展布位置。分析认为东海海底火成岩具有沿北北东向成带发育的特点,沿深大断裂侵入于中生代地层;北北西向火成岩带发育时间较晚,规模小,与北西向断裂形成较晚相对应,火成岩分布呈现东西分带的特点,陆架盆地中低部隆起为喜马拉雅早—中期岩浆岩。
Using the latest gravity,magnetic and seismic data acquired by the marine geological survey project of Shanghai sheet on the scale of 1∶1000,000,this paper analyzed the characteristics of gravity and magnetic fields in addition to the structural and lithological interpretation of seismic profiles.Helped by the geophysical features of the known igneous rocks,we inferred the distribution pattern of the igneous rocks in the East China Sea.Our results show that in the East China Sea,igneous rocks largely intrude in the Mesozoic along deep faults and extend in zones along the NNE direction.The small scale NWW trending igneous rocks erupted in later stage follow the later formed NW faults,and are distributed as stripes in E-W.And the early and middle Himalayan magmatic rocks occur in the central uplift of the East China Sea Shelf Basin.
Using the latest gravity,magnetic and seismic data acquired by the marine geological survey project of Shanghai sheet on the scale of 1∶1000,000,this paper analyzed the characteristics of gravity and magnetic fields in addition to the structural and lithological interpretation of seismic profiles.Helped by the geophysical features of the known igneous rocks,we inferred the distribution pattern of the igneous rocks in the East China Sea.Our results show that in the East China Sea,igneous rocks largely intrude in the Mesozoic along deep faults and extend in zones along the NNE direction.The small scale NWW trending igneous rocks erupted in later stage follow the later formed NW faults,and are distributed as stripes in E-W.And the early and middle Himalayan magmatic rocks occur in the central uplift of the East China Sea Shelf Basin.
引文
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[11]高德章,唐建,薄玉玲.东海海礁凸起、钱塘凹陷中、古生代地层展布探讨[J].海洋石油,2005,25(3):1-6.[GAO Dezhang,TANG Jian,BO Yuling.Study on the distri bution of Mesozoic and Paleozoic layer in Haijiao Doming and Oiantang Depression in the East China Sea[J].Offshore Oil,2005,25(3):1-6.]
[2]李家彪.东海区域地质[M].北京:海洋出版社,2008.[LI Jiabiao.Regional Geology of the East China Sea[M].Beijing:China Ocean Press,2008.]
[3]杨文达,崔征科,张异彪.东海地质与矿产[M].北京:海洋出版社,2010.[YANG Wenda,CUI Zhengke,ZHANG Yibiao.Geology and Mineral Resources in the East China Sea[M].Beijing:China Ocean Press,2010.]
[4]江为为,宋海斌,郝天珧,等.东海陆架盆地及其周边海域地质、地球物理场特征[J].地球物理学进展,2001,16(2):18-27.[JIANG Weiwei,SONG Haibin,HAO Tianyao,et al.The characters of geology and geophysics of shell basins of East China Sea and adjacent sea area[J].Progress in Geophysics,2001,16(2):18-27.]
[5]青岛海洋地质研究所.1∶100万上海幅海洋区域地质调查成果报告[R].2012.[Qingdao Institute of Marine Geology.Final report of 1∶1 000 000 marine regional geological survey of Shanghai sheet[R].2012.]
[6]高德章.东海陆架盆地岩石密度与磁性[J].上海地质,1995(54):38-45.[GAO Dezhang.Density and magnetic of rocks in the East Sea shelf basin[J].Shanghai Geology,1995,54(2):38-45.]
[7]黄仲良.石油重、磁、电法勘探[M].东营:中国石油大学出版社,2008.[HUANG Zhongliang.Gravity,Magnetic and Electrical Prospecting of Petroleum[M].Dongying:China University of Petroleum Press,2008.]
[8]高德章,赵金海,薄玉玲,等.东海重磁地震综合探测剖面研究[J].地球物理学报,2004(47):853-861.[GAO Dezhang,ZHAO Jinhai,BO Yuling,et al.A profile study of gravitativemagnetic and seismic comprehensive survey in the East China Sea[J].Chinese J.Geophysics,2004(47):853-861.]
[9]戴明刚.东海及邻域的两条剖面地球物理反演与综合解释[J].地球物理学进展,2004,19(2):331-340.[DAI Minggang.Inversion research for gravity and synthetical interpretation of two profiles in the area of East China Sea and its adjacency[J].Progress in Geophys,2004,19(2):331-340.]
[10]丁海涛,陈冰,高德章,等.东海陆架盆地典型剖面的综合地球物理解释[J].勘探地球物理进展,2004,27(4):269-273.[DING Haitao,CHEN Bing,GAO Dezhang,et al.Integrated geophysical interpretation of the typical profile of the East China Sea shell basin[J].Progress in Exploration Geophysics,2004,27(4):269-273.]
[11]高德章,唐建,薄玉玲.东海海礁凸起、钱塘凹陷中、古生代地层展布探讨[J].海洋石油,2005,25(3):1-6.[GAO Dezhang,TANG Jian,BO Yuling.Study on the distri bution of Mesozoic and Paleozoic layer in Haijiao Doming and Oiantang Depression in the East China Sea[J].Offshore Oil,2005,25(3):1-6.]
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