Provenance, weathering conditions, and tectonic evolution history of the Cambrian meta-sediments in the Zhuguangshan area, Cathaysia Block
Provenance, weathering conditions, and tectonic evolution history of the Cambrian meta-sediments in the Zhuguangshan area, Cathaysia Block
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华夏地块诸光山地区寒武系变质沉积物物源、风化条件及构造演化历史
DOI：
10.1016/j.precamres.2018.04.011
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发表时间：
2018-07
影响因子：
3.8
通讯作者：
Qin Leisheng
中科院分区：
文献类型：
--
作者：
Wang Kaixing;Sun Liqiang;Sun Tao;Huanghui;Qin Leisheng
通过对珠江山地区寒武系沉积序列中的砂泥岩进行分析，探讨了它们的物源、风化条件、沉积环境以及华夏地块前寒武纪构造演化。碎屑锆石年代学至少定义了5个年龄群：2658-2370 Ma、1866-1500 Ma、1390-1268 Ma、1250-858 Ma和830-700 Ma。2648-2370 Ma的人口可能对应于新太古代全球大陆增长。1816-1510 Ma的岩石群可能代表了由哥伦比亚超大陆组装引起的俯冲事件。1390-1268 Ma和1250-858 Ma的年龄段反映了Rodinia超大陆组装的构造-热事件，而830-700 Ma的年龄段可能与Rodinia超大陆的裂解有关。碎屑锆石Hf同位素组成表明，其形成机制涉及多次年轻物质的输入和较老地壳物质的改造，砂泥岩显示K2 O富集，而Na 2 O、CaO和Sr中度至极度亏损，常量和微量元素表明，砂泥岩来自于再生长英质岩，沉积于被动大陆边缘。原岩的成分推断相当于安山岩到花岗闪长岩。岩石学和地球化学特征表明，砂岩和泥岩经历了中等至强烈的化学风化作用。铝质粘土矿物转化为伊利石被推断为主要的沉积后钾交代作用。
Sandstones and mudstones collected from the Cambrian sedimentary sequences in the Zhuguangshan area were analyzed to trace their provenance, weathering conditions, depositional environment, and Precambrian tectonic evolution in the Cathaysia Block, South China. Detrital zircon geochronology defines at least five populations: 2658–2370 Ma, 1866–1500 Ma, 1390–1268 Ma, 1250–858 Ma, and 830–700 Ma. The 2648–2370 Ma population may correspond to the Neoarchean global continental growth. The 1816–1510 Ma population may represent a subduction event caused by the assembly of the Columbia supercontinent. The 1390–1268 Ma and 1250–858 Ma population reflect the tectono-thermal events associated with the assembly of the Rodinia supercontinent, while the 830–700 Ma population may be associated with the breakup of the Rodinia supercontinent. Detrital zircon Hf isotopic compositions indicate that the mechanism involves multiple juvenile inputs and the reworking of older crustal materials.The sandstones and mudstones display K2O enrichment, but they are moderately to extremely depleted in Na2O, CaO and Sr. The major and trace elements reveal that the sandstones and mudstones were derived from recycled felsic rocks and deposited in the passive continental margin. The compositions of the protoliths are inferred equivalent to andesite to granodiorite. The petrographic and geochemical features indicate that the sandstones and mudstones have undergone medium to intensive chemical weathering. Conversion of aluminous clay minerals to illite is inferred to be the predominant post-depositional potash metasomatism.
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影响因子：
3
作者：
Longming Li;M. Sun;Yuejun Wang;Guangfu Xing;Guochun Zhao;Yanhong He;Kejun He;Aimei Zhang
通讯作者：
Longming Li;M. Sun;Yuejun Wang;Guangfu Xing;Guochun Zhao;Yanhong He;Kejun He;Aimei Zhang
影响因子：
6.1
作者：
S. Rino;Y. Kon;W. Sato;S. Maruyama;M. Santosh;Dapeng Zhao
通讯作者：
S. Rino;Y. Kon;W. Sato;S. Maruyama;M. Santosh;Dapeng Zhao
影响因子：
3.8
作者：
D. Young;Jian-xin Zhao;D. Ellis;M. McCulloch
通讯作者：
D. Young;Jian-xin Zhao;D. Ellis;M. McCulloch
影响因子：
3.8
作者：
A. Hofmann
通讯作者：
A. Hofmann
影响因子：
3.5
作者：
Qiong-Xia Xia-Qiong-Xia-Xia-104886927;Yong‐Fei Zheng;Honglin Yuan;Fu-Yuan Wu
通讯作者：
Qiong-Xia Xia-Qiong-Xia-Xia-104886927;Yong‐Fei Zheng;Honglin Yuan;Fu-Yuan Wu