Stratigraphic correlations and occurrence patterns of two sets of Lower Cretaceous black shales in coastal southeastern China and geological implications: insights from zircon U–Pb ages
Stratigraphic correlations and occurrence patterns of two sets of Lower Cretaceous black shales in coastal southeastern China and geological implications: insights from zircon U–Pb ages
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中国东南沿海两套下白垩统黑色页岩地层对比、产状模式及地质意义：锆石U-Pb年龄的启示
DOI：
10.1002/gj.2813
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发表时间：
2017-07
影响因子：
1.8
通讯作者：
Guang Hu
中科院分区：
文献类型：
--
作者：
Guang Hu
中国东南沿海下白垩统黑色页岩对太平洋构造域的地质研究具有重要意义。然而，迄今为止，页岩的地层对比和产状模式尚未得到很好的约束。为了解决这些局限性，131个新的锆石U-Pb年龄从凝灰岩层，这是夹层的页岩从四个露头。结合已有的年代学资料，讨论了黑色页岩的地层对比和产出模式。结果表明，粤北北方大亚湾剖面水底山组（~145 Ma）的黑色页岩比闽南永安剖面北部板头组下部（~132 Ma）的黑色页岩更古老，而与板头组底部（~144 Ma）的黑色页岩大致等时。相反，闽西北永安剖面板头组上部（~117 Ma）的黑色页岩和赣东北益阳剖面石溪组（~ 117 Ma）的黑色页岩可与闽西北崇安剖面板头组（~ 117 Ma）的黑色页岩进行等时对比，比浙西上张、下湖园剖面的管头组（~113 Ma）稍老。浙东北石浦群I、II单元（~113-109 Ma）的黑色页岩与浙西管头组（~113-106 Ma）的黑色页岩可进行等时对比。这些新的地层对比表明，中国东南沿海下白垩统黑色页岩可划分为两个区域尺度的组。第一套沉积于早白垩世早期（Berriasian-Hauterivian），具有穿时性（大亚湾剖面为144 ± 2 Ma，永安剖面为132 ± 2 Ma）。第二组黑色页岩沉积于早白垩世晚期，大致等厚（~117 Ma）。这些结果表明，早白垩世太平洋板块在中国东南沿海的俯冲过程可分为两个明显的阶段，即~145-120 Ma和~120-100 Ma的两个火山-黑色页岩旋回。第一套黑色页岩的分布可能延伸到南海近海盆地，而第二套可能延伸到台湾海峡。这两组都可能是潜在的石油前景。版权所有© 2016约翰威利父子有限公司.
Lower Cretaceous black shales in coastal southeastern China are of significance to the geological study of the Pacific tectonic domains. However, the stratigraphic correlations and occurrence patterns of the shales have not been well constrained so far. To address these limitations, 131 new zircon U–Pb dates were obtained from the tuff layers, which were interlayered with the shales from four outcrops. In combination with previously reported geochronological data, the stratigraphic correlations and occurrence patterns of the black shales were discussed. Results show that the black shales in the Shuidishan Formation (~145 Ma) in the Dayawan section, northern Guangdong, are older than those in the lower part of the Bantou Formation (~132 Ma) in the northward Yong'an section, southern Fujian, whereas they are roughly isochronous to the base of the Bantou Formation (~144 Ma). In contrast, the black shales in the upper part of the Bantou Formation (~117 Ma) from the Yong'an section in northwestern Fujian and the black shales in the Shixi Formation (~117 Ma) from the Yiyang section in northeastern Jiangxi can be isochronously correlated with the black shales in the Bantou Formation (~117 Ma) from the Chong'an section in northwestern Fujian, and they are slightly older than those in the Guantou Formation (~113 Ma) from the Shangzhang and Xiahuyuan sections in western Zhejiang. Black shales in Units I and II of the Shipu Group (~113–109 Ma) in northeastern Zhejiang can be isochronously correlated with those in the Guantou Formation (~113–106 Ma) in western Zhejiang. These new stratigraphic correlations indicate that the Lower Cretaceous black shales in coastal southeastern China can be divided into two regional‐scale sets. The first set was deposited during the early Early Cretaceous (Berriasian–Hauterivian) and is diachronous (i.e. 144 ± 2 Ma in the Dayawan section and 132 ± 2 Ma in the Yong'an section). The second set of black shales was deposited during the later Early Cretaceous and was roughly isochronous (~117 Ma). These results imply that the processes of the Pacific plate subduction in coastal southeastern China during the Early Cretaceous varied in two distinct stages that are identified by two volcanic–black shale cycles (i.e. ~145–120 and ~120–100 Ma). The distribution of the first set of black shales may extend to offshore basins in the South China Sea, whereas the second set may extend to the Taiwan Strait. Both sets are likely to be potential petroleum prospects. Copyright © 2016 John Wiley & Sons, Ltd.
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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
DOI：
10.1016/s0920-5446(00)80025-4
发表时间：
2000
期刊：
Developments in Palaeontology and Stratigraphy
影响因子：
--
作者：
Chen Pei-ji
通讯作者：
Chen Pei-ji
DOI：
10.1016/j.palaeo.2008.02.008
发表时间：
2008-06
期刊：
Palaeogeography, Palaeoclimatology, Palaeoecology
影响因子：
--
作者：
J. Sha;H. Hirano;X. Yao;Yan-Hong Pan
通讯作者：
J. Sha;H. Hirano;X. Yao;Yan-Hong Pan
影响因子：
--
作者：
Yuping Su;Jianping Zheng;W. Griffin;Huayun Tang;S. O’Reilly;Xiang Lin
通讯作者：
Yuping Su;Jianping Zheng;W. Griffin;Huayun Tang;S. O’Reilly;Xiang Lin
影响因子：
2.7
作者：
W. Kohlberger
通讯作者：
W. Kohlberger