Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1130/B31695.1 |
Zircon provenance data record the lateral extent of pancontinental, early Neoproterozoic rivers and erosional unroofing history of the Grenville orogen | |
Rainbird, Robert H.1; Rayner, N. M.1; Hadlari, T.2; Heaman, L. M.3; Ielpi, A.4; Turner, E. C.4; MacNaughton, R. B.2 | |
2017-11-01 | |
发表期刊 | GEOLOGICAL SOCIETY OF AMERICA BULLETIN
![]() |
ISSN | 0016-7606 |
EISSN | 1943-2674 |
出版年 | 2017 |
卷号 | 129 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada |
英文摘要 | We present detrital zircon U-Pb data from mainly fluvial sandstones of the Mackenzie Mountains Supergroup, Yukon (four samples), and the Shaler Supergroup, Northwest Territories (seven samples). The high similarity of data sets from widely separated units supports long-held stratigraphic correlations between the late Mesoproterozoic-Neoproterozoic Mackenzie and Amundsen basins. The breadth of the inferred fluvial system was at least 1200 km, much wider than any modern fluvial system on Earth. Zircon ages show mainly local provenance at the base of the Shaler Supergroup, with the gradual up-section introduction of more distal sources that closely match the ages of magmatic rocks characterizing the Grenville and Granite-Rhyolite Provinces of eastern and southern Laurentia, respectively. Two episodes of siliciclastic influx, represented by the Escape Rapids Formation and the younger Nelson Head Formation (Rae Group), correspond with periods of uplift and erosional unroofing that would have followed the two main phases of the Grenvillian orogeny, the Shawinigan (ca 1200-1140 Ma) and the Otta-wan (ca 1090-1050 Ma). Carbonate rocks of the intervening Mikkelsen Islands Formation, and possibly correlative Tabasco Formation of the Mackenzie basin, are interpreted to record an interval of tectonic quiescence and subdued siliciclastic influx. Our work establishes a detrital zircon reference for late Mesoproterozoic-Neo-proterozoic strata of northern Laurentia that is comparable with that of coeval sequences from the circum-North Atlantic region. These strata could have been deposited in similarly large interior basins, possibly connected to the Amundsen-Mackenzie and Borden basins. Such a paleogeographic scenario was likely only possible during a time of continental aggregation (e.g., supercontinent Rodinia), when orogenic belts extended between adjacent continental blocks and huge basins lay within the supercontinent's interior. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000414365400002 |
WOS关键词 | MESOPROTEROZOIC MIDCONTINENT RIFT ; LAKE-SUPERIOR REGION ; DETRITAL ZIRCON ; NW SCOTLAND ; MOINE SUPERGROUP ; U-PB ; NORTHWEST-TERRITORIES ; PROTEROZOIC EVOLUTION ; EXTENSIONAL COLLAPSE ; FORELAND BASIN |
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/25211 |
专题 | 地球科学 |
作者单位 | 1.Geol Survey Canada, 601 Booth St, Ottawa, ON K1A 0E8, Canada; 2.Geol Survey Canada, 3303 33rd St NW, Calgary, AB T2L 2A7, Canada; 3.Univ Alberta, Dept Earth & Atmospher Sci, Edmonton, AB T6G 2E3, Canada; 4.Laurentian Univ, Dept Earth Sci, Sudbury, ON P3E 2C6, Canada |
推荐引用方式 GB/T 7714 | Rainbird, Robert H.,Rayner, N. M.,Hadlari, T.,et al. Zircon provenance data record the lateral extent of pancontinental, early Neoproterozoic rivers and erosional unroofing history of the Grenville orogen[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2017,129. |
APA | Rainbird, Robert H..,Rayner, N. M..,Hadlari, T..,Heaman, L. M..,Ielpi, A..,...&MacNaughton, R. B..(2017).Zircon provenance data record the lateral extent of pancontinental, early Neoproterozoic rivers and erosional unroofing history of the Grenville orogen.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,129. |
MLA | Rainbird, Robert H.,et al."Zircon provenance data record the lateral extent of pancontinental, early Neoproterozoic rivers and erosional unroofing history of the Grenville orogen".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 129(2017). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论