Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018GL079976 |
Coeval Early Ediacaran Breakup of Amazonia, Baltica, and Laurentia: Evidence From Micro-Baddeleyite Dating of Dykes From the Novillo Canyon, Mexico | |
Weber, Bodo1; Schmitt, Axel K.2; de Leon, Aejandro Cisneros2; Gonzalez-Guzman, Renee1 | |
2019-02-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
卷号 | 46期号:4页码:2003-2011 |
文章类型 | Article |
语种 | 英语 |
国家 | Mexico; Germany |
英文摘要 | Final Rodinia supercontinent breakup during the early Ediacaran is recorded by mafic dyke swarms in Baltica and Laurentia, but corresponding dykes have been elusive for Amazonia, the third craton involved. We report ages and compositions for plume-related dykes intruded into Rodinia-type basement of the Novillo Gneiss, part of a microcontinent placed between Amazonia and Baltica in Rodinia reconstructions. In situ U-Pb micro-baddeleyite dating with secondary ion mass spectrometry yielded dyke intrusion ages of 619 +/- 9 Ma (95% c.i.), coeval with ages of similar dykes from Baltica and Laurentia. A younger age group is consistent with an earlier Ar-40-Ar-39 age at similar to 545 Ma, reflecting Pb loss and recrystallization during hydrothermal alteration. The results indicate an Amazonia-Baltica-Laurentia connection prior to opening of the Iapetus Ocean and suggest a previously unrecognized superplume-related large igneous province extending over all sides of the former triple point. Weathering of these large igneous province basalts may have contributed to Ediacaran Gaskiers glaciation. |
英文关键词 | Rodinia breakup micro-baddeleyite geochronology Ediacaran SIMS Mexico |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000461855600013 |
WOS关键词 | U-PB ; SW NORWAY ; NORTH-AMERICA ; RODINIA ; EVOLUTION ; HISTORY ; ZIRCON ; SWARM ; ROCKS ; RECONSTRUCTION |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/26012 |
专题 | 气候变化 |
作者单位 | 1.Ctr Invest Cient & Educ Super Ensenada, Dept Geol, Ensenada, Baja California, Mexico; 2.Heidelberg Univ, Inst Geowissensch, Heidelberg, Germany |
推荐引用方式 GB/T 7714 | Weber, Bodo,Schmitt, Axel K.,de Leon, Aejandro Cisneros,et al. Coeval Early Ediacaran Breakup of Amazonia, Baltica, and Laurentia: Evidence From Micro-Baddeleyite Dating of Dykes From the Novillo Canyon, Mexico[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(4):2003-2011. |
APA | Weber, Bodo,Schmitt, Axel K.,de Leon, Aejandro Cisneros,&Gonzalez-Guzman, Renee.(2019).Coeval Early Ediacaran Breakup of Amazonia, Baltica, and Laurentia: Evidence From Micro-Baddeleyite Dating of Dykes From the Novillo Canyon, Mexico.GEOPHYSICAL RESEARCH LETTERS,46(4),2003-2011. |
MLA | Weber, Bodo,et al."Coeval Early Ediacaran Breakup of Amazonia, Baltica, and Laurentia: Evidence From Micro-Baddeleyite Dating of Dykes From the Novillo Canyon, Mexico".GEOPHYSICAL RESEARCH LETTERS 46.4(2019):2003-2011. |
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