Refined chronostratigraphy of the late Mesozoic terrestrial strata in South China and its tectono-stratigraphic evolution
Refined chronostratigraphy of the late Mesozoic terrestrial strata in South China and its tectono-stratigraphic evolution
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华南晚中生代陆相地层精细年代地层及其构造地层演化
DOI：
10.1016/j.gr.2018.09.006
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发表时间：
2019-02
影响因子：
6.1
通讯作者：
Liu Ling
中科院分区：
文献类型：
--
作者：
Li Xianghui;Zhang Chaokai;Li Yongxiang;Wang Yin;Liu Ling
华南晚中生代众多盆地中的陆相地层为认识华南乃至东亚的构造演化提供了重要的沉积档案。然而，由于有限的年代学约束，在盆地内建立区域地层格架和精确地对比盆地之间的地层仍然具有挑战性。本文报道了华南火山-沉积盆地15个典型剖面21个样品的锆石U-Pb年龄和132个可靠年龄数据。综合地质年代学使我们能够建立晚中生代陆地地层的精细年代地层学。新的标定结果表明，大多数岩石地层单位是历时的，横向叠加，和/或交指。根据岩石地层单位之间的关系，划分出6种叠加样式。精细年代地层学和地层叠加样式的分析，以及岩性组合，揭示了三幕构造地层演化。第一集（~145-125 Ma）以强烈的火山作用为特征，火山岩地层的广泛出现和（137-120 Ma）A型花岗岩，可能与俯冲的古太平洋板块的后滚作用有关;在第二次大地震中沉积的地层（~125-100 Ma）是由沉积断陷盆地中与火山岩夹层有关或不与火山岩夹层有关的杂色沉积物组成，表明火山作用和构造作用的减弱归因于Izanagi/Kula板块俯冲的结束;在ep 3中（<~100 Ma），红色地层沿着NE-SW向左行走滑断裂或小盆地破裂失败带发育，这可能是古太平洋板块俯冲方向由NW向SN向急剧变化的结果。
The late Mesozoic terrestrial strata in numerous basins in S (South) China provide important sedimentary archives to understand the tectonic evolution of S China and East Asia. However, establishing regional stratigraphic framework within a basin and precisely correlating strata among basins remain challenging due to limited chronological constraints. In this study, we report zircon U-Pb ages of 21 samples and a compilation of 132 reliable age data from 15 type sections of the volcanic-sedimentary basins in S China. The synthesized geochronology allows us to establish a refined chronostratigraphy for the late Mesozoic terrestrial strata. New calibrated results indicate that most of the lithostratigraphic units are diachronic, laterally stacking, and/or interfingering. Six stacking styles are classified for the relationship of lithostratigraphic units. Analysis of the refined chronostratigraphy and the stratal stacking styles, together with lithological composition, reveals three episodes of tectono-stratigraphic evolution. Episode I (~145–125 Ma) is characterized by intense volcanism, as evidenced by widespread occurrence of volcanic strata and (137–120 Ma) A-type granites, and was probably related to the rollback of the subducting Paleo-Pacific plate; The strata deposited during Episode II (~125–100 Ma) are composed of variegated sediments associated with/without volcanic intercalations in sedimentary faulted-depression basins, indicating the waning of volcanism and tectonism attributed to the ending of the Izanagi/Kula plate subduction; In Episode III (<~100 Ma), red strata occurred along the NE-SW sinistral strike-slip faulting or failed rifting in small basins, which probably resulted from the drastic directional change of the Paleo-Pacific plate subduction from NW to SN.
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DOI：
--
发表时间：
2007
期刊：
--
影响因子：
--
作者：
Li Peixian
通讯作者：
Li Peixian
影响因子：
3.9
作者：
Zhenyu He;Xi‐sheng Xu
通讯作者：
Zhenyu He;Xi‐sheng Xu
DOI：
--
发表时间：
2011
期刊：
--
影响因子：
--
作者：
Hu Guang;Hu Wenxuan;Cao Jian;Y. Suping;Wan Xueyin;Li Youxiang
通讯作者：
Hu Guang;Hu Wenxuan;Cao Jian;Y. Suping;Wan Xueyin;Li Youxiang
影响因子：
2.1
作者：
Xinqi Yu;Ganguo Wu;Da Zhang;Tie-zeng Yan;Y. Di;Longwu Wang
通讯作者：
Xinqi Yu;Ganguo Wu;Da Zhang;Tie-zeng Yan;Y. Di;Longwu Wang
影响因子：
6.1
作者：
Yuejun Wang;W. Fan;Guowei Zhang;Yanhua Zhang
通讯作者：
Yuejun Wang;W. Fan;Guowei Zhang;Yanhua Zhang