秭归盆地中新生代构造-热演化的裂变径迹约束
发布时间：2018-11-26 15:09
【摘要】：通过磷灰石裂变径迹年龄的测定以及时间-温度热历史的反演,揭示了秭归盆地中新生代构造-热演化过程。结果表明:秭归盆地自120 Ma左右开始缓慢隆升,主要经历了3个强烈的隆升阶段:(1)晚白垩世100~80 Ma开始强烈隆升,是燕山期造山运动在该地区作用的结果,也可能是黄陵背斜晚白垩世强烈抬升向西延伸的响应;(2)晚始新世40 Ma的强烈隆升,可能是印度板块和亚欧板块碰撞初期作用的远程响应;(3)中新世中期到末期10~5 Ma的强烈隆升,是青藏高原东部边界向东扩展及亚洲季风气候变化的响应。秭归盆地内部自白垩纪以来一直隆升剥蚀,展现出与盆地边缘构造-热演化的差异。通过与黄陵背斜东部的当阳盆地构造-热事件的对比,暗示了黄陵背斜在晚白垩世已隆升剥露至地表,分割了两个盆地。晚侏罗世—早白垩世,秦岭大规模挤压变形逆冲推覆构造作用使得米仓山—汉南隆起和黄陵背斜地区成为中上扬子地区磷灰石裂变径迹年龄相对最大的区域,江南—雪峰陆内造山作用向西北方向的扩展使得湘鄂西地区向川东地区磷灰石裂变径迹年龄具有整体变年轻的趋势。晚白垩世以来太平洋板块俯冲挤压效应使得川东褶皱带周缘及川东北磷灰石裂变径迹年龄自南东向北西方向减小,江汉盆地、当阳盆地及龙泉山以西记录的年轻的磷灰石裂变径迹年龄则与青藏高原隆升及其向南东方向构造逃逸的挤压作用和亚洲季风等气候变化的影响有关。
[Abstract]:Through the determination of apatite fission track age and the inversion of time-temperature thermal history, the Meso-Cenozoic tectonic-thermal evolution process of Zigui Basin is revealed. The results show that the Zigui basin began to rise slowly from about 120 Ma and experienced three strong uplift stages: (1) the late Cretaceous 100 ~ 80 Ma began to uplift strongly, which was the result of Yanshanian orogenic movement in this area. It may also be a response to the strong uplift and westward extension of the Huangling anticline in the late Cretaceous. (2) the strong uplift of 40 Ma in the late Eocene may be the remote response of the early collision between the Indian plate and the Eurasian plate; (3) the strong uplift of 10 ~ 5 Ma from mid-Miocene to late Miocene is a response to the eastward extension of the eastern boundary of the Qinghai-Xizang Plateau and the change of the Asian monsoon climate. Zigui basin has been uplift and denuded since the Cretaceous, showing the difference between the tectonic and thermal evolution of the basin margin. By comparing with the tectonic-thermal events of the Dangyang basin in the east of the Huangling anticline, it is suggested that the Huangling anticline has been uplifted and exposed to the surface of the earth in the late Cretaceous, dividing the two basins. In the late Jurassic-early Cretaceous, the massive compressional deformation thrust nappe in the Qinling Mountains made the Mecangshan-Hannan uplift and the Huangling anticline the relatively largest apatite fission track ages in the middle and upper Yangtze regions. The spreading of intracontinental orogeny from Jiangnan to Xuefeng makes the fission track age of apatite in the west of Hunan and Hubei to the east of Sichuan become younger. Since the late Cretaceous, the subduction and compression effect of the Pacific plate has reduced the fission track ages of apatite in the eastern part of Sichuan and in the northeast of Sichuan, from south to north to west, and the Jianghan basin. The young apatite fission track ages recorded in the Dangyang Basin and west of Longquan Mountain are related to the uplift of the Qinghai-Xizang Plateau and the squeezing of southeastward tectonic escape and the influence of climate change such as the Asian monsoon.
【作者单位】： 中国地质大学(武汉)构造与油气资源教育部重点实验室;中国地质大学(武汉)资源学院;
【基金】：国家自然科学基金项目(41372140,40902038) 湖北省杰出青年基金项目(2016CFA055) 武汉市科技晨光计划项目(2016070204010145) 中央高校基本科研业务费专项资金资助项目(CUG201536)
【分类号】：P314;P548
[Abstract]:Through the determination of apatite fission track age and the inversion of time-temperature thermal history, the Meso-Cenozoic tectonic-thermal evolution process of Zigui Basin is revealed. The results show that the Zigui basin began to rise slowly from about 120 Ma and experienced three strong uplift stages: (1) the late Cretaceous 100 ~ 80 Ma began to uplift strongly, which was the result of Yanshanian orogenic movement in this area. It may also be a response to the strong uplift and westward extension of the Huangling anticline in the late Cretaceous. (2) the strong uplift of 40 Ma in the late Eocene may be the remote response of the early collision between the Indian plate and the Eurasian plate; (3) the strong uplift of 10 ~ 5 Ma from mid-Miocene to late Miocene is a response to the eastward extension of the eastern boundary of the Qinghai-Xizang Plateau and the change of the Asian monsoon climate. Zigui basin has been uplift and denuded since the Cretaceous, showing the difference between the tectonic and thermal evolution of the basin margin. By comparing with the tectonic-thermal events of the Dangyang basin in the east of the Huangling anticline, it is suggested that the Huangling anticline has been uplifted and exposed to the surface of the earth in the late Cretaceous, dividing the two basins. In the late Jurassic-early Cretaceous, the massive compressional deformation thrust nappe in the Qinling Mountains made the Mecangshan-Hannan uplift and the Huangling anticline the relatively largest apatite fission track ages in the middle and upper Yangtze regions. The spreading of intracontinental orogeny from Jiangnan to Xuefeng makes the fission track age of apatite in the west of Hunan and Hubei to the east of Sichuan become younger. Since the late Cretaceous, the subduction and compression effect of the Pacific plate has reduced the fission track ages of apatite in the eastern part of Sichuan and in the northeast of Sichuan, from south to north to west, and the Jianghan basin. The young apatite fission track ages recorded in the Dangyang Basin and west of Longquan Mountain are related to the uplift of the Qinghai-Xizang Plateau and the squeezing of southeastward tectonic escape and the influence of climate change such as the Asian monsoon.
【作者单位】： 中国地质大学(武汉)构造与油气资源教育部重点实验室;中国地质大学(武汉)资源学院;
【基金】：国家自然科学基金项目(41372140,40902038) 湖北省杰出青年基金项目(2016CFA055) 武汉市科技晨光计划项目(2016070204010145) 中央高校基本科研业务费专项资金资助项目(CUG201536)
【分类号】：P314;P548
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