| 四川盆地侏罗纪至早白垩世沉积旋回与构造隆升的关系 |
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| 引用本文： | 王永标,徐海军.四川盆地侏罗纪至早白垩世沉积旋回与构造隆升的关系[J].地球科学,2001,26(3):241-246. |
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| 作者姓名： | 王永标 徐海军 |
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| 作者单位： | 中国地质大学地球科学学院，湖北武汉430074 |
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| 基金项目： | 国土资源部国际合作与科技司项目!(No .0 0 0 12 0 0 7) |
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| 摘 要： | 为弄清四川盆地在侏罗至白垩纪的演化及古气候特征，对该时期的沉积相及生物特征进行了综合分析。研究证明，侏罗纪至白垩纪四川盆地周边山系的构造活动可分为两个旋回，早、中株罗世为第一个旋回，晚侏罗至早白垩世为第二个旋回，第个旋回的早期多以湖相泥页岩、砂岩夹介壳灰岩的广泛发育为特征，沉积物颗粒细、厚度较小，反映出相对稳定的构造背景，晚期则以大套杂色的河流相砂泥岩、巨厚的河流相及洪冲积相砂泥岩、砂砾岩及砾岩的出现为特征，且厚度巨大，反映出盆地周边山系强烈的构造隆升。从沉积物及生物特征上分析，第一个旋回期间，四川盆地处在一个温暖湿润的环境之下，而从第二个旋回开始，总体则以潮湿、炎热的气候为特征。
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| 关 键 词： | 沉积旋回 古气候 构造隆升 侏罗纪 早白垩世 四川盆地 沉积相 生物特征 |
| 文章编号： | 1000-2383(2001)03-0241-06 |
RELATIONS BETWEEN EVOLUTION OF SEDIMENTARY CYCLES AND TECTONIC UPLIFT AROUND SICHUAN BASIN FROM JURASSIC TO EARLY CRETACEOUS |
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| Wang Yongbiao,Xu Haijun.RELATIONS BETWEEN EVOLUTION OF SEDIMENTARY CYCLES AND TECTONIC UPLIFT AROUND SICHUAN BASIN FROM JURASSIC TO EARLY CRETACEOUS[J].Earth Science-Journal of China University of Geosciences,2001,26(3):241-246. |
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| Authors: | Wang Yongbiao Xu Haijun |
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| Abstract: | Sedimentary facies and paleontology are synthetically analyzed in order to clarify the evolution and paleo climate of Shichuan basin during Jurassic and Cretaceous. The study shows that the tectogenesis around the basin can be divided into two cycles during Jurassic and Cretaceous. One began from Early Jurassic and ended in Middle Jurassic and the other one from Late Jurassic to Early Cretaceous. The basin was widely covered by mudstone, sandstone and shell limestone of lake facies in the early stage of the above two cycles. The thickness is relatively small and the sedimentary particles are much more fine grained both in the early stage of the two cycles, showing that the tectogenesis is relatively stable. However, in the late stage the basin is characterized by widely spread varicolored thick sandstone, mudstone and conglomerate of river or alluvial fan facies. Even more, there are usually sediments and coarse sedimentary particles of large thickness in the late stages, reflecting rapid uplift of the mountains around the basin. According to the study of sedimentation and fossils, Sichuan basin should have a warm climate during the first cycle and hot climate from the beginning of the second cycle. |
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| Keywords: | sedimentary cycle paleo climate tectonic uplift Jurassic Early Cretaceous Sichuan basin |
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