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DOI | 10.1130/B35150.1 |
Laurentian origin of the Cuyania suspect terrane, western Argentina, confirmed by Hf isotopes in zircon | |
Martin, Erin L.; Collins, William J.; Spencer, Christopher J. | |
2020 | |
发表期刊 | GEOLOGICAL SOCIETY OF AMERICA BULLETIN |
ISSN | 0016-7606 |
EISSN | 1943-2674 |
出版年 | 2020 |
卷号 | 132期号:1-2页码:273-290 |
文章类型 | Article |
语种 | 英语 |
国家 | Australia |
英文摘要 | The proto-Andean margin of Argentina consists of several suspect terranes, the origins of which are disputed. The Cuyania (greater Precordillera) suspect terrane was originally interpreted to be of southeast Laurentian affinity, but more recently a southwestern Gondwanan provenance has been argued. Both potential source regions comprise Mesoproterozoic rocks, but we show they are isotopically distinct, using previously published zircon Lu-Hf data. Detrital zircon epsilon(Hf) data from southwestern Gondwana (Namaqua-Natal belt) show no correlation with new zircon U-Pb and Lu-Hf data from Cuyania, suggesting that Gondwana was not the source of these sediments. Rather, detrital zircons from Cambrian strata in Cuyania yield Mesoproterozoic zircons with depleted epsilon(Hf) that correlate to the Grenville margin of Laurentia, and a ca. 535 Ma zircon population sourced directly from rift-related rocks of the Ouachita Embayment, thus recording rifting and drifting of Cuyania from Laurentia. By contrast, zircons from Middle to Late Ordovician strata of Cuyania record a larger range of epsilon(Hf) values, correlated with Western Sierras Pampeanas Mesoproterozoic basement inliers of Argentina. These synorogenic clastic deposits record the Ordovician arrival of Cuyania at the proto-Andean margin of Gondwana. The new data require the terrane boundaries of Cuyania to be redefined, thereby excluding Western Sierras Pampeanas basement inliers. The results verify the Laurentian microcontinent model for the origin of Cuyania. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000505809800015 |
WOS关键词 | EARLY PALEOZOIC EVOLUTION ; PLASMA-MASS SPECTROMETRY ; NAMAQUA-NATAL PROVINCE ; LA-PLATA CRATON ; U-PB ZIRCON ; SIERRAS PAMPEANAS ; PRECORDILLERA TERRANE ; OUACHITA EMBAYMENT ; GRENVILLE OROGEN ; DETRITAL ZIRCONS |
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/279407 |
专题 | 地球科学 |
作者单位 | Curtin Univ, Sch Earth & Planetary Sci, Inst Geosci Res TIGeR, Earth Dynam Res Grp, Perth, WA 6845, Australia |
推荐引用方式 GB/T 7714 | Martin, Erin L.,Collins, William J.,Spencer, Christopher J.. Laurentian origin of the Cuyania suspect terrane, western Argentina, confirmed by Hf isotopes in zircon[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2020,132(1-2):273-290. |
APA | Martin, Erin L.,Collins, William J.,&Spencer, Christopher J..(2020).Laurentian origin of the Cuyania suspect terrane, western Argentina, confirmed by Hf isotopes in zircon.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,132(1-2),273-290. |
MLA | Martin, Erin L.,et al."Laurentian origin of the Cuyania suspect terrane, western Argentina, confirmed by Hf isotopes in zircon".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 132.1-2(2020):273-290. |
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