Early Cambrian palaeobiogeography of the Zhenba–Fangxian Block (South China): Independent terrane or part of the Yangtze Platform?
Early Cambrian palaeobiogeography of the Zhenba–Fangxian Block (South China): Independent terrane or part of the Yangtze Platform?
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镇巴—房县地块（华南）早寒武世古生物地理学：独立地体还是扬子地台的一部分？
DOI：
10.1016/j.gr.2014.09.020
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发表时间：
2015-12
影响因子：
6.1
通讯作者：
Keupp, H.
中科院分区：
文献类型：
--
作者：
Yang, B.;Steiner, M.;Keupp, H.
对扬子地块与南秦岭地体过渡带镇巴-房县地块早寒武世小骨骼化石进行了研究和订正。该研究揭示了一个多样化的动物群，有47种不同的生物亲缘关系，包括新物种Gapparodus gapparitessp。将SSF归属于新定义的Cambroclavus fangxianensis-Rhombocorniculum cancellatum组合带。根据对陕西镇巴地区寒武纪第三阶（相当于西伯利亚的阿塔达巴尼阶-博托曼阶）SSF动物群的调查结果，并结合已发表的资料，对该阶段的古生物地理进行了研究。一个层次皮尔逊相似性聚类分析的295种来自32个地区的世界表明一个独特的古生物地理格局与7个动物区系省。这一结果与已有的早寒武世古地理重建结果基本一致。镇巴-房县地块的SSF组合与扬子地块的SSF组合相似性较低。相反，它们与来自Armorica、塔里木和Karatau-Naryn的化石（南哈萨克斯坦/北吉尔吉斯斯坦）具有高度的相似性。扬子地块具有独特的SSF组合，不同于大多数其他地区。镇巴-房县地块的地体-寒武系第三阶段沉积序列与南秦岭地体的沉积序列较为一致。此外，埃迪卡拉纪沉积型锰矿和寒武纪重晶石/毒重石型矿床在镇巴-房县地块上具有独特的分布格局。根据该区动物群组成、沉积序列和沉积矿床分布的差异，推测镇巴-房县地块在新元古代-寒武纪之交可能是一个独立的陆块，与扬子地块的距离更远。SSF的古生物地理学分析也表明阿瓦隆尼亚和西伯利亚之间有更紧密的联盟。它证实了古地理重建在冈瓦纳大陆边缘，在澳大利亚，南极洲和阿莫里卡附近的中国北方。
Early Cambrian small skeletal fossils (SSFs) are studied and revised from the Zhenba–Fangxian Block of the transitional zone between the Yangtze Block and the South Qinling Terrane. The study reveals a diverse fauna with 47 species of various biological affinities, including the new speciesGapparodus gapparitessp. nov. The SSFs are assigned to the newly definedCambroclavus fangxianensis–Rhombocorniculum cancellatumAssemblage Zone. Based on the investigated SSF fauna from Zhenba County, Southeast Shaanxi of China and published data, a palaeobiogeographic study is carried out for the Cambrian Stage 3 (equivalent to the Atdabanian–Botoman of Siberia). A hierarchical Pearson similarity cluster analysis of 295 species from 32 regions of the world indicates a distinct palaeobiogeographic pattern with seven faunal provinces. The result is mostly consistent with existing palaeogeographic reconstructions for the early Cambrian. However, it is also shown that the SSF assemblages of the Zhenba–Fangxian Block have low similarity with those of the Yangtze Block. Instead, they share high similarity with those from Armorica, Tarim and the Karatau–Naryn terranes (South Kazakhstan/North Kyrgyzstan). The Yangtze Block has a unique SSF assemblage dissimilar to most of other regions. The Terreneuvian–Cambrian Stage 3 sedimentary sequence of the Zhenba–Fangxian Block is more consistent with that of the South Qinling Terrane. Besides, sedimentary Ediacaran manganese ore deposits and Cambrian barite/witherite deposits have unique distribution pattern on the Zhenba–Fangxian Block. Derived from the profound dissimilarities in faunal composition, sedimentary sequence and distribution of sedimentary ore deposits, we hypothesize that during the Neoproterozoic–Cambrian transition, the Zhenba–Fangxian Block might have been an independent terrane and more distant from the Yangtze Block. The palaeobiogeographic analysis of SSFs also indicates a closer alliance between Avalonia and Siberia. It corroborates the palaeogeographic reconstruction of North China at the margin of Gondwana, in the vicinity of Australia, Antarctica, and Armorica.
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影响因子：
3
作者：
Zhen Yan;Zong-qi Wang;Junlu Chen;Q. Yan;Tao Wang
通讯作者：
Zhen Yan;Zong-qi Wang;Junlu Chen;Q. Yan;Tao Wang
DOI：
--
发表时间：
2013
期刊：
Acta Geological Sinica
影响因子：
--
作者：
Z. Yongqing
通讯作者：
Z. Yongqing
影响因子：
3.8
作者：
E. A. Serezhnikova;A. L. Ragozina;D. Dorjnamjaa;L. V. Zaitseva
通讯作者：
E. A. Serezhnikova;A. L. Ragozina;D. Dorjnamjaa;L. V. Zaitseva
镀板的寒武纪双遗迹揭示了棘皮动物进化的最早阶段。
影响因子：
3.7
作者：
Zamora S;Rahman IA;Smith AB
通讯作者：
Smith AB
DOI：
10.1086/341762
发表时间：
2002-09
期刊：
The Journal of Geology
影响因子：
--
作者：
Mei‐Fu Zhou;A. Kennedy;M. Sun;J. Malpas;C. Lesher
通讯作者：
Mei‐Fu Zhou;A. Kennedy;M. Sun;J. Malpas;C. Lesher