气候变化领域集成服务门户(CCPortal): Minimum Bedrock Exposure Ages and Their Implications: Larsemann Hills and Neighboring Bolingen Islands, East Antarctica

CCPortal

DOI	10.1111/j.1755-6724.2010.00271.x
	Minimum Bedrock Exposure Ages and Their Implications: Larsemann Hills and Neighboring Bolingen Islands, East Antarctica
	Huang Feixin; Li Guangwei; Liu Xiaohan; Kong Ping; Ju Yitai; Fink, David; Fang Aimin; Yu Liangjun
通讯作者	Huang, FX (通讯作者)
发表日期	2010
ISSN	1000-9515
起始页码	543
结束页码	548
卷号	84 期号:3
英文摘要	Considerable controversy exists over whether or not extensive glaciation occurred during the global Last Glacial Maximum (LGM) in the Larsemann Hills. In this study we use the in situ produced cosmogenic nuclide 10Be (half life 1.51 Ma) to provide minimum exposure ages for six bedrock samples and one erratic boulder in order to determine the last period of deglaciation in the Larsemann Hills and on the neighboring Bolingen Islands. Three bedrock samples taken from Friendship Mountain (the highest peak on the Mirror Peninsula, Larsemann Hills; similar to 2 km from the ice sheet) have minimum exposure ages ranging from 40.0 to 44.7 ka. The erratic boulder from Peak 106 (just at the edge of the ice sheet) has a younger minimum exposure age of only 8.8 ka. The minimum exposure ages for two bedrock samples from Blundell Peak (the highest peak on Stornes Peninsula, Larsemann Hills; similar to 2 km from the ice sheet) are about 17 and 18 ka. On the Bolingen Islands (southwest to the Larsemann Hills; similar to 10 km from the ice sheet), the minimum exposure age for one bedrock sample is similar to that at Friendship Mountain (i.e., 44 ka). Our results indicate that the bedrock exposure in the Larsemann Hills and on the neighboring Bolingen Islands commenced obviously before the global LGM (i.e., 20-22 ka), and the bedrock erosion rates at the Antarctic coast areas may be obviously higher than in the interior land.
关键词	LAST GLACIAL MAXIMUM ICE-SHEET PRYDZ BAY COSMOGENIC NUCLIDES SIRIUS GROUP DRY-VALLEYS BE-10 AL-26 HISTORY EROSION
英文关键词	east Antarctica; Larsemann Hills; Bolingen Islands; 10Be exposure age; erosion rate
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000278516400009
来源期刊	ACTA GEOLOGICA SINICA-ENGLISH EDITION
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/257805
推荐引用方式 GB/T 7714	Huang Feixin,Li Guangwei,Liu Xiaohan,et al. Minimum Bedrock Exposure Ages and Their Implications: Larsemann Hills and Neighboring Bolingen Islands, East Antarctica[J]. 中国科学院青藏高原研究所,2010,84(3).
APA	Huang Feixin.,Li Guangwei.,Liu Xiaohan.,Kong Ping.,Ju Yitai.,...&Yu Liangjun.(2010).Minimum Bedrock Exposure Ages and Their Implications: Larsemann Hills and Neighboring Bolingen Islands, East Antarctica.ACTA GEOLOGICA SINICA-ENGLISH EDITION,84(3).
MLA	Huang Feixin,et al."Minimum Bedrock Exposure Ages and Their Implications: Larsemann Hills and Neighboring Bolingen Islands, East Antarctica".ACTA GEOLOGICA SINICA-ENGLISH EDITION 84.3(2010).