Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1130/B35100.1 |
Seismic stratigraphy of the Sabrina Coast shelf, East Antarctica: Early history of dynamic meltwater-rich glaciations | |
Montelli, Aleksandr1,4; Gulick, Sean P. S.1; Fernandez, Rodrigo1,5; Frederick, Bruce C.1,6; Shevenell, Amelia E.2; Leventer, Amy3; Blankenship, Donald D.1 | |
2020-03-01 | |
发表期刊 | GEOLOGICAL SOCIETY OF AMERICA BULLETIN |
ISSN | 0016-7606 |
EISSN | 1943-2674 |
出版年 | 2020 |
卷号 | 132期号:3-4页码:545-561 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; England; Chile |
英文摘要 | High-resolution seismic data from the Sabrina Coast continental shelf, East Antarctica, elucidate the Cenozoic evolution of the East Antarctic Ice Sheet. Detailed seismic stratigraphic and facies analysis reveal the Paleogene to earliest Pliocene glacial evolution of the Aurora Basin catchment, including at least 12 glacial expansions across the shelf indicated by erosional surfaces and chaotic acoustic character of strata. Differences in facies composition and seismic architecture reveal several periods of ice-free conditions succeeded by glacial expansions across the shelf. A deep (similar to 100 m), undulating erosional surface suggests the initial appearance of grounded ice on the shelf. Following the initial ice expansion, the region experienced an interval of open-marine to ice-distal conditions, marked by an up to 200-m-thick sequence of stratified sediments. At least three stacked erosional surfaces reveal major cross-shelf glacial expansions of regional glaciers characterized by deep (up to similar to 120 m) channel systems associated with extensive subglacial meltwater. The seismic character of the sediments below the latest Miocene to earliest Pliocene regional unconformity indicates intervals of glacial retreat interrupted by advances of temperate, meltwater-rich glacial ice from the Aurora Basin catchment. Our results document the Paleogene to late Miocene glacial history of this climatically sensitive region of East Antarctica and provide an important paleoenvironmental context for future scientific drilling to constrain the regional climate and timing of Cenozoic glacial variability. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000518916800005 |
WOS关键词 | WILKES LAND MARGIN ; ICE-SHEET DYNAMICS ; PINE ISLAND BAY ; TROUGH-MOUTH FAN ; NORTH-SEA BASIN ; TUNNEL-VALLEYS ; ROSS SEA ; CONTINENTAL-MARGIN ; WEDDELL SEA ; BELLINGSHAUSEN SEA |
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/279428 |
专题 | 地球科学 |
作者单位 | 1.Univ Texas Austin, Jackson Sch Geosci, Inst Geophys, Austin, TX 78758 USA; 2.Univ S Florida, Coll Marine Sci, St Petersburg, FL 33701 USA; 3.Colgate Univ, Geol Dept, Hamilton, NY 13346 USA; 4.Univ Cambridge, Scott Polar Res Inst, Cambridge CB2 1ER, England; 5.Univ Chile, Dept Geol, Chile Plaza Ercilla 803, Santiago, Region Metropol, Chile; 6.Univ Kansas, Lawrence, KS 66045 USA |
推荐引用方式 GB/T 7714 | Montelli, Aleksandr,Gulick, Sean P. S.,Fernandez, Rodrigo,et al. Seismic stratigraphy of the Sabrina Coast shelf, East Antarctica: Early history of dynamic meltwater-rich glaciations[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2020,132(3-4):545-561. |
APA | Montelli, Aleksandr.,Gulick, Sean P. S..,Fernandez, Rodrigo.,Frederick, Bruce C..,Shevenell, Amelia E..,...&Blankenship, Donald D..(2020).Seismic stratigraphy of the Sabrina Coast shelf, East Antarctica: Early history of dynamic meltwater-rich glaciations.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,132(3-4),545-561. |
MLA | Montelli, Aleksandr,et al."Seismic stratigraphy of the Sabrina Coast shelf, East Antarctica: Early history of dynamic meltwater-rich glaciations".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 132.3-4(2020):545-561. |
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