A plume broke up Columbia supercontinent: Evidence from the Mesoproterozoic metamafic rocks in the Tarim Craton, NW China
A plume broke up Columbia supercontinent: Evidence from the Mesoproterozoic metamafic rocks in the Tarim Craton, NW China
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羽流分裂了哥伦比亚超大陆：来自中国西北部塔里木克拉通中元古代变质岩的证据
DOI：
10.1016/j.precamres.2022.106719
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发表时间：
2022-08
影响因子：
3.8
通讯作者：
Yu Qi
中科院分区：
文献类型：
--
作者：
Pei Lv;Shengyao Yu;Yinbiao Peng;Chunyu Wang;Sanzhong Li;Yongjiang Liu;Xiangyu Gao;Deyou Sun;Xingzhou Jiang;Wentao Ji;Chuanzhi Li;Lintao Wang;Yu Qi
·变质岩可分为高铁组和低铁组，前者类似于N-MORB，后者类似于E-MORB。·高铁族和低铁族可能来自地幔热柱的不同部分。·塔里木克拉通、北中国克拉通和北澳大利亚克拉通可能被同一超烟柱所主导。在中元古代，地球上发生了一次史诗般的转变，哥伦比亚超大陆最终解体。了解导致哥伦比亚超级大陆最终解体的动力机制，对于确定包括地质、环境和生命在内的地球演化至关重要。然而，关于是什么驱使哥伦比亚超大陆解体的研究很少。在这里，我们通过整合塔里木克拉通东南部乌龙布鲁克地块变质岩的新的锆石U-Pb年龄、Lu-Hf同位素和全岩地球化学数据来关注这一问题。这些资料表明，这些变质岩的原岩侵位年龄约为1.37~1.35Ga，并可分为高铁组和低铁组。高铁组和低铁组分别具有与正常大洋中脊玄武岩(N-MORB)和富集型大洋中脊玄武岩(E-MORB)相似的地球化学特征。高铁群是尖晶石相二辉橄榄岩源区高度(7%~9%)部分熔融形成的，低铁群是尖晶石相二辉橄榄岩源区较低程度(5%~6%)部分熔融形成的。我们认为，高铁和低铁群可能来自地幔热柱不同部位的岩浆。乌龙布卢克地块1.37~1.35Ga变质岩的形成可能与塔里木克拉通分裂成塔里木克拉通南北两部分有关，从而导致塔里木中洋盆地的初步开放。通过与北中国克拉通的燕辽裂谷和澳大利亚北部的麦克阿瑟盆地的对比，我们认为这三个克拉通可能由一个超羽控制，形成环形裂谷带并辐射岩墙。这股超烟羽引发了哥伦比亚大部分地区的持续延伸，并导致了哥伦比亚超大陆的最终解体。
• The metamafic rocks can be classified into high-Fe and low-Fe groups, and the former is similar to N-MORB and the latter is similar to E-MORB. • The high-Fe and low-Fe groups may have been derived from different parts of a mantle plume. • The Tarim Craton, North China Craton, and North Australia Craton may potentially dominated by the same superplume. In the Mesoproterozoic, there was an epic transition on Earth, the final breakup of the Columbia supercontinent. Understanding the dynamic mechanism responsible for the final breakup of Columbia supercontinent is crucial for establishing Earth’s evolution that includes geology, environment and life. However, there is little research on what drove the breakup of the Columbia supercontinent. Here we focus on this issue by integrating new zircon U-Pb ages, Lu-Hf isotopes, and whole-rock geochemical data for metamafic rocks from the Oulongbuluke Block in the southeast of Tarim Craton. These data show that the protoliths of these metamafic rocks were emplaced at ca. 1.37–1.35 Ga and were divided into high-Fe and low-Fe groups. The high-Fe and low-Fe groups show geochemical character similar to normal mid-ocean ridge basalt (N-MORB) and enriched mid-ocean ridge basalt (E-MORB), respectively. The high-Fe group was formed by high degree (7%-9%) partial melting of spinel-phase lherzolite mantle source, whereas the low-Fe group was derived from low degree (5%-6%) partial melting of spinel-phase lherzolite mantle source. We propose that the high-Fe and low-Fe groups may have been derived from magmas from different parts of a mantle plume. The formation of the 1.37–1.35 Ga metamafic rocks in the Oulongbuluke Block may be related to the separation of the Tarim Craton into North and South Tarim cratons, which resulted in the opening of the initial Middle Tarim Ocean Basin. By comparison with the plume-induced Yanliao Rift of North China Craton and McArthur Basin of North Australia Craton, we present that these three cratons may potentially dominated by a superplume, forming circular rift zone and radiating dykes. This superplume triggered the continuous extension to most parts of Columbia and led to the final breakup of the Columbia supercontinent.
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影响因子：
3.9
作者：
FREY, FA;GREEN, DH;ROY, SD
通讯作者：
ROY, SD
影响因子：
3.8
作者：
Sheng‐yao Yu;Jianxin Zhang;San-zhong Li;Deyou Sun;Yunshuai Li;Xin Liu;Ling‐li Guo;Y. Suo
通讯作者：
Sheng‐yao Yu;Jianxin Zhang;San-zhong Li;Deyou Sun;Yunshuai Li;Xin Liu;Ling‐li Guo;Y. Suo
影响因子：
2.6
作者：
Guochun Zhao;San-zhong Li;M. Sun;S. Wilde
通讯作者：
Guochun Zhao;San-zhong Li;M. Sun;S. Wilde
影响因子：
3.9
作者：
I. Horn;S. Foley;S. Jackson;G. Jenner
通讯作者：
I. Horn;S. Foley;S. Jackson;G. Jenner
影响因子：
4.9
作者：
Xuan‐Ce Wang;Xian‐Hua Li;Wu-Xian Li;Zheng‐Xiang Li;Y. Liu;Yue-heng Yang;Xi-rong Liang;X. Tu
通讯作者：
Xuan‐Ce Wang;Xian‐Hua Li;Wu-Xian Li;Zheng‐Xiang Li;Y. Liu;Yue-heng Yang;Xi-rong Liang;X. Tu