Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1130/B31425.1 |
Paleomagnetic evidence for a large rotation of the Yukon block relative to Laurentia: Implications for a low-latitude Sturtian glaciation and the breakup of Rodinia | |
Eyster, Athena E.1; Fu, Roger R.2; Strauss, Justin V.3; Weiss, Benjamin P.2; Roots, Charlie F.4; Halverson, Galen P.5; Evans, David A. D.6; Macdonald, Francis A.1 | |
2017 | |
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 | USA; Canada |
英文摘要 | Understanding the tectonic history of the supercontinent Rodinia is crucial for testing proposed links among Neoproterozoic tectonics, supercontinent cycles, climate, and biogeochemistry. The Neoproterozoic Mount Harper volcanics of the Ogilvie Mountains, Yukon, Canada, interfinger with Sturtianage (ca. 717-660 Ma) glacial deposits that were deposited in narrow, fault-bounded basins related to the breakup of Rodinia. Here, we present new paleomagnetic data from the Mount Harper volcanics and isolate four paleomagnetic directions: a low-temperature direction recording the present geomagnetic field, a mid-temperature direction consistent with a Cretaceous overprint, and two high-temperature directions, one of which is carried by hematite and likely represents a chemical overprint, and the other of which is carried by magnetite and likely is a primary direction. This primary pole passes the fold and conglomerate tests and includes a reversal but is 50 degrees away from the coeval 721-712 Ma Laurentian Franklin large igneous province pole. This difference can be reconciled using a 50 degrees counterclock-wise rotation of the Yukon block relative to Laurentia. The prerotation reconstruction of the Yukon block relative to Laurentia aligns Neoproterozoic fault orientations and facies belts between the Wernecke and Mackenzie Mountains, rectifies paleoflow measurements in Mesoproterozoic and Paleoproterozoic strata, and realigns the orientation of the ca. 1260 Ma Bear River dikes with the Mackenzie dike swarm of northern Canada. This reconstruction also facilitates future studies that relate Neoproterozoic sedimentary and structural patterns to the fragmentation of Rodinia. Finally, this low-latitude pole supports the snowball Earth interpretation of the ca. 717 Ma Sturtian glacial deposits. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000390988400003 |
WOS关键词 | TRUE POLAR WANDER ; GEOMAGNETIC SECULAR VARIATION ; CALC-ALKALINE MAGMATISM ; U-PB GEOCHRONOLOGY ; MACKENZIE MOUNTAINS ; NORTHWEST-TERRITORIES ; PROTEROZOIC EVOLUTION ; ARCTIC CANADA ; WINDERMERE SUPERGROUP ; SIBERIAN CONNECTION |
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/25391 |
专题 | 地球科学 |
作者单位 | 1.Harvard Univ, Dept Earth & Planetary Sci, 20 Oxford St, Cambridge, MA 02138 USA; 2.MIT, Dept Earth Atmospher & Planetary Sci, Bldg 54-724, Cambridge, MA 02139 USA; 3.Dartmouth Coll, Dept Earth Sci, HB6105 Fairchild Hall, Hanover, NH 03755 USA; 4.Nat Resources Canada, Box 2703,K-102, Whitehorse, YT Y1A 2C6, Canada; 5.McGill Univ, Dept Earth & Planetary Sci, 3450 Univ St, Montreal, PQ H3A0E8, Canada; 6.Yale Univ, Dept Geol & Geophys, POB 6666, New Haven, CT 06520 USA |
推荐引用方式 GB/T 7714 | Eyster, Athena E.,Fu, Roger R.,Strauss, Justin V.,et al. Paleomagnetic evidence for a large rotation of the Yukon block relative to Laurentia: Implications for a low-latitude Sturtian glaciation and the breakup of Rodinia[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2017,129. |
APA | Eyster, Athena E..,Fu, Roger R..,Strauss, Justin V..,Weiss, Benjamin P..,Roots, Charlie F..,...&Macdonald, Francis A..(2017).Paleomagnetic evidence for a large rotation of the Yukon block relative to Laurentia: Implications for a low-latitude Sturtian glaciation and the breakup of Rodinia.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,129. |
MLA | Eyster, Athena E.,et al."Paleomagnetic evidence for a large rotation of the Yukon block relative to Laurentia: Implications for a low-latitude Sturtian glaciation and the breakup of Rodinia".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 129(2017). |
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