Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1130/B31539.1 |
Luminescence dating of paleolake deltas and glacial deposits in Garwood Valley, Antarctica: Implications for climate, Ross ice sheet dynamics, and paleolake duration | |
Levy, Joseph S.1; 39;Connor, Jim E.2 | |
2017-09-01 | |
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 | USA |
英文摘要 | The formation of perched deltas and other lacustrine deposits in the McMurdo Dry Valleys of Antarctica is widely considered to be evidence of valley-filling lakes dammed by the grounded Ross Sea ice sheet during the local Last Glacial Maximum, with lake drainage interpreted as a record of grounding line retreat. We used luminescence dating to determine the age of paleolake deltas and glacial tills in Garwood Valley, a coastal dry valley that opens to the Ross Sea. Luminescence ages are stratigraphically consistent with radiocarbon results from algal mats within the same delta deposits but suggest radiocarbon dates from lacustrine carbonates may overestimate deposit ages by thousands of years. Results suggest that late Holocene delta deposition into paleolake Howard in Garwood Valley persisted until ca. 3.5 ka. This is significantly younger than the date when grounded ice is thought to have retreated from the Ross Sea. Our evidence suggests that the local, stranded ice-cored till topography in Garwood Valley, rather than regional ice-sheet dynamics, may have controlled lake levels for some McMurdo Dry Valleys paleolakes. Age control from the supraglacial Ross Sea drift suggests grounding and up-valley advance of the Ross Sea ice sheet into Garwood valley during marine oxygen isotope stage (MIS) 4 (71-78 ka) and the local Last Glacial Maximum (9-10 ka). This work demonstrates the power of combining luminescence dating with existing radiocarbon data sets to improve understanding of the relationships among paleolake formation, glacial position, and stream discharge in response to climate change. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000409330000003 |
WOS关键词 | MCMURDO DRY VALLEYS ; OPTICALLY STIMULATED LUMINESCENCE ; REGENERATIVE-DOSE PROTOCOL ; SOUTHERN VICTORIA LAND ; TAYLOR VALLEY ; SOUND REGION ; PROGLACIAL LAKE ; PROGRESS REPORT ; BONNEY DRIFT ; SEA DRIFT |
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/25389 |
专题 | 地球科学 |
作者单位 | 1.Univ Texas Austin, Inst Geophys, Austin, TX 78758 USA; 2.Utah State Univ, Dept Geol, Logan, UT 84322 USA; 3.Portland State Univ, Dept Geol, Portland, OR 97201 USA; 4.US Geol Survey, 2130 SW 5th Ave 210, Portland, OR 97201 USA; 5.Colgate Univ, Dept Geol, Hamilton, NY 13346 USA |
推荐引用方式 GB/T 7714 | Levy, Joseph S.,39;Connor, Jim E.. Luminescence dating of paleolake deltas and glacial deposits in Garwood Valley, Antarctica: Implications for climate, Ross ice sheet dynamics, and paleolake duration[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2017,129. |
APA | Levy, Joseph S.,&39;Connor, Jim E..(2017).Luminescence dating of paleolake deltas and glacial deposits in Garwood Valley, Antarctica: Implications for climate, Ross ice sheet dynamics, and paleolake duration.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,129. |
MLA | Levy, Joseph S.,et al."Luminescence dating of paleolake deltas and glacial deposits in Garwood Valley, Antarctica: Implications for climate, Ross ice sheet dynamics, and paleolake duration".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