南海北部古俯冲带的位置及其对南海扩张的控制
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摘要
为了确定南海北部古俯冲带的具体位置,作者利用美国LCT综合反演软件对收集到的重磁数据进行处理解释,结果显示在南海北部从台湾西南部到一统暗沙隆起,即沿南海海盆北部陆坡为一条布格重力异常水平梯度峰值带,指示了古俯冲带的具体位置;其北部的高磁异常代表了与之对应的古火山弧。深反射地震资料也验证了南海北部陆坡位置存在古俯冲带,钻井资料显示俯冲带存在的时代为晚侏罗世到早白垩世。据此绘制了南海地区晚中生代到现今的构造古地理演化图,指出南海的扩张应与晚中生代俯冲带这个先存的软弱带有关,南海海盆正是从古俯冲带的位置开始扩张。
To determine the exact location of the Mesozoic subduction zone in the northern South China Sea,the LCT joint inversion software is used to process gravity and magnetic data.The results show that there is a high horizontal-gradient of Bouguer gravity anomaly zone from southwestern Taiwan to the east of Yitongansha uplift,which may indicate the location of the ancient subduction,and there is a high magnetic anomaly zone parallel the gravity anomaly suggesting a Mesozoic volcanic arc which corresponds to the subduction.Well information proves that the subduction took place from the Late Jurassic to Early Cretaceous.Based on all above,we draw the tectonopaleogeographic evolution map of the South China Sea from Late Mesozoic to present day,and argue that the ancient subduction zone was a pre-existing weak band controlled the initial position of the spreading of the South China Sea oceanic basin.
To determine the exact location of the Mesozoic subduction zone in the northern South China Sea,the LCT joint inversion software is used to process gravity and magnetic data.The results show that there is a high horizontal-gradient of Bouguer gravity anomaly zone from southwestern Taiwan to the east of Yitongansha uplift,which may indicate the location of the ancient subduction,and there is a high magnetic anomaly zone parallel the gravity anomaly suggesting a Mesozoic volcanic arc which corresponds to the subduction.Well information proves that the subduction took place from the Late Jurassic to Early Cretaceous.Based on all above,we draw the tectonopaleogeographic evolution map of the South China Sea from Late Mesozoic to present day,and argue that the ancient subduction zone was a pre-existing weak band controlled the initial position of the spreading of the South China Sea oceanic basin.
引文
黄春菊,周蒂,陈长民,孙珍,郝沪军.2005.深反射地震剖面所揭示的白云凹陷的深部地壳结构.科学通报,50(10):1024-1031.
李家彪.1999.南海地体系迁移与碰撞//许东禹主编.海洋地质学与古海洋学//第30届国际地质大会论文集.13:24-34.
李唐根.1987.南海重力异常图//何廉声,陈邦彦主编.南海地质地球物理图集.广州:广东省地图出版社.
刘海龄,阎贫,刘迎春,邓辉.2006.南海北缘琼南缝合带的存在.科学通报,51(2):92-101.
鲁银涛.2008.南海北部陆坡-洋陆边界特提斯痕迹探讨.中国科学院研究生院(海洋研究所)硕士学位论文.
邵磊,尤洪庆,郝沪军,吴国瑄,乔培军,雷永昌.2007.南海东北部中生界岩石学特征及沉积环境.地质论评,53(2):164-169.
沈晓明,张海祥,张伯友.2008.华南中生代变质核杂岩构造及其与岩石圈减薄机制的关系初探.大地构造与成矿学,32(1):11-19.
孙龙涛,孙珍,周蒂,刘海龄.2008.南沙海区礼乐盆地沉积地层与构造特征分析.大地构造与成矿学,32(2):151-158.
王鸿祯,刘本培,李思田.1990.中国及邻区大地构造划分和构造发展阶段//中国及邻区构造古地理和生物古地理.武汉:中国地质大学出版社:3-34.
吴国瑄,王汝建,郝沪军,邵磊.2007.南海北部海相中生界发育的微体化石证据.海洋地质与第四纪地质,27(1):79-85.
夏戡原,黄慈流,黄志明.2004.南海及邻区中生代(晚三叠世-白垩纪)地层分布特征及含油气性对比.中国海上油气,18(2):73-83.
颜佳新,周蒂.2001.南海北部陆缘区中特提斯构造演化研究.海洋地质与第四纪地质,21(4):49-54.
杨树春,仝志刚,郝建荣,贺清,刘海龄,闫贫.2009.南海南部礼乐盆地构造热演化研究.大地构造与成矿学,33(3):359-364.
姚伯初,曾维军,陈艺中.1994.南海北部陆缘东部的地壳结构.地球物理学报,37(1):27-35.
姚伯初.1996.南海海盆新生代的构造演化史.海洋地质与第四纪地质,16(2):1-13.
周蒂,陈汉宗,孙珍,许鹤华.2005.南海中生代三期海盆及其与特提斯和古太平洋的关系.热带海洋学报,24(2):16-25.
周蒂,王万银,庞雄,王家林,蔡东升,孙珍.2006.地球物理资料所揭示的南海东北部中生代俯冲增生带.中国科学(D辑),36(3):209-218.
周祖翼.1992.闽东沿海构造带//刘光鼎主编.中国海区及邻域地质地球物理特征.北京:科学出版社:320-326.
邹和平.2001.南海北部陆缘张裂-岩石圈拆沉的地壳响应.海洋地质与第四纪地质,21:39-44.
Barber A J.2000.The origin of the Woyla Terranes in Sumatraand the Late Mesozoic evolution of the Sundaland margin.Asian Earth Sci,18:713-738.
Hall R.1998.The plate tectonics of Cenozoic SE Asia and thedistribution of land and sea//Hall R and Holloway J D(eds).Biogeography and Geological Evolution of SE Asia.Leiden:Backhuys Publishers:99-131.
Holloway N H.1982.The north Palawan block,Philippines:Itsrelation to the Asian mainland and its role in the evolutionof the South China Sea.Am Assoc Petrol Geol Bull,66(9):1355-1383.
Hutchison C S.1989.Geological evolution of Southeast Asia//Oxford Monographs on Geology and Geophysics,13.Oxford:Clarendon Press:355.
Lee T Y and Lawver L A.1994.Cenozoic plate reconstructionsof Southeast Asia.Tectonophysics,235:149-180.
Matsuoka A.1992.Jurassic-Early Cretaceous tectonic evolutionof the Southern Chichibu terrane,southwest Japan.Palaeogeography,Palaeoclimatology,Palaeoecology,96:7188.
Sano H,Yamagata T and Horibo K.1992.Tectonostratigraphyof Mino terrane:Jurassic accretionary complex of southwestJapan.Palaeogeography,Palaeoclimatology,Palaeoecology,96:41-57.
Taylor B and Hayes D E.1983.Origin and history of the SouthChina Sea basin//Hayes D E(ed).The tectonic and geologic evolution of Southeast Asian seas and islands:Part2.Geophysical Monograph,AGU,Washington,27:2356.
Vishnevskaya V.1992.Significance of Mesozoic radiolariansfortectonostratigraphy in Pacific rim terranes of the formerUSSR.Palaeogeography,Palaeoclimatology,Palaeoecology,96:23-39.
Wakita K.2000.Cretaceous accretionary-collision complexes incentral Indonesia.Asian Earth Sci,18:739-749.
Williams P R,Johnston C R,Almond R A and Simamora W H.1988.Late Cretaceous to Early Tertiary structural elementsof West Kalimantan.Tectonophysics,148:2790-297.
李家彪.1999.南海地体系迁移与碰撞//许东禹主编.海洋地质学与古海洋学//第30届国际地质大会论文集.13:24-34.
李唐根.1987.南海重力异常图//何廉声,陈邦彦主编.南海地质地球物理图集.广州:广东省地图出版社.
刘海龄,阎贫,刘迎春,邓辉.2006.南海北缘琼南缝合带的存在.科学通报,51(2):92-101.
鲁银涛.2008.南海北部陆坡-洋陆边界特提斯痕迹探讨.中国科学院研究生院(海洋研究所)硕士学位论文.
邵磊,尤洪庆,郝沪军,吴国瑄,乔培军,雷永昌.2007.南海东北部中生界岩石学特征及沉积环境.地质论评,53(2):164-169.
沈晓明,张海祥,张伯友.2008.华南中生代变质核杂岩构造及其与岩石圈减薄机制的关系初探.大地构造与成矿学,32(1):11-19.
孙龙涛,孙珍,周蒂,刘海龄.2008.南沙海区礼乐盆地沉积地层与构造特征分析.大地构造与成矿学,32(2):151-158.
王鸿祯,刘本培,李思田.1990.中国及邻区大地构造划分和构造发展阶段//中国及邻区构造古地理和生物古地理.武汉:中国地质大学出版社:3-34.
吴国瑄,王汝建,郝沪军,邵磊.2007.南海北部海相中生界发育的微体化石证据.海洋地质与第四纪地质,27(1):79-85.
夏戡原,黄慈流,黄志明.2004.南海及邻区中生代(晚三叠世-白垩纪)地层分布特征及含油气性对比.中国海上油气,18(2):73-83.
颜佳新,周蒂.2001.南海北部陆缘区中特提斯构造演化研究.海洋地质与第四纪地质,21(4):49-54.
杨树春,仝志刚,郝建荣,贺清,刘海龄,闫贫.2009.南海南部礼乐盆地构造热演化研究.大地构造与成矿学,33(3):359-364.
姚伯初,曾维军,陈艺中.1994.南海北部陆缘东部的地壳结构.地球物理学报,37(1):27-35.
姚伯初.1996.南海海盆新生代的构造演化史.海洋地质与第四纪地质,16(2):1-13.
周蒂,陈汉宗,孙珍,许鹤华.2005.南海中生代三期海盆及其与特提斯和古太平洋的关系.热带海洋学报,24(2):16-25.
周蒂,王万银,庞雄,王家林,蔡东升,孙珍.2006.地球物理资料所揭示的南海东北部中生代俯冲增生带.中国科学(D辑),36(3):209-218.
周祖翼.1992.闽东沿海构造带//刘光鼎主编.中国海区及邻域地质地球物理特征.北京:科学出版社:320-326.
邹和平.2001.南海北部陆缘张裂-岩石圈拆沉的地壳响应.海洋地质与第四纪地质,21:39-44.
Barber A J.2000.The origin of the Woyla Terranes in Sumatraand the Late Mesozoic evolution of the Sundaland margin.Asian Earth Sci,18:713-738.
Hall R.1998.The plate tectonics of Cenozoic SE Asia and thedistribution of land and sea//Hall R and Holloway J D(eds).Biogeography and Geological Evolution of SE Asia.Leiden:Backhuys Publishers:99-131.
Holloway N H.1982.The north Palawan block,Philippines:Itsrelation to the Asian mainland and its role in the evolutionof the South China Sea.Am Assoc Petrol Geol Bull,66(9):1355-1383.
Hutchison C S.1989.Geological evolution of Southeast Asia//Oxford Monographs on Geology and Geophysics,13.Oxford:Clarendon Press:355.
Lee T Y and Lawver L A.1994.Cenozoic plate reconstructionsof Southeast Asia.Tectonophysics,235:149-180.
Matsuoka A.1992.Jurassic-Early Cretaceous tectonic evolutionof the Southern Chichibu terrane,southwest Japan.Palaeogeography,Palaeoclimatology,Palaeoecology,96:7188.
Sano H,Yamagata T and Horibo K.1992.Tectonostratigraphyof Mino terrane:Jurassic accretionary complex of southwestJapan.Palaeogeography,Palaeoclimatology,Palaeoecology,96:41-57.
Taylor B and Hayes D E.1983.Origin and history of the SouthChina Sea basin//Hayes D E(ed).The tectonic and geologic evolution of Southeast Asian seas and islands:Part2.Geophysical Monograph,AGU,Washington,27:2356.
Vishnevskaya V.1992.Significance of Mesozoic radiolariansfortectonostratigraphy in Pacific rim terranes of the formerUSSR.Palaeogeography,Palaeoclimatology,Palaeoecology,96:23-39.
Wakita K.2000.Cretaceous accretionary-collision complexes incentral Indonesia.Asian Earth Sci,18:739-749.
Williams P R,Johnston C R,Almond R A and Simamora W H.1988.Late Cretaceous to Early Tertiary structural elementsof West Kalimantan.Tectonophysics,148:2790-297.
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