A physical record of the Antarctic Circumpolar Current: Late Miocene to recent slowing of abyssal circulation

被引：18

作者：

Hassold, Noralynn J. C. ^{[1
]}

Rea, David K. ^{[1
]}

van der Pluijm, Ben A. ^{[1
]}

Pares, Josep M. ^{[1
]}

机构：

[1] Univ Michigan, Dept Geol Sci, Ann Arbor, MI 48109 USA

来源：

PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY | 2009年 / 275卷 / 1-4期

基金：

美国国家科学基金会;

关键词：

Antarctic Circumpolar Current; ODP leg 178; Miocene; Magnetic fabric; Grain size; PACIFIC MARGIN; SEDIMENT DRIFT; LATE NEOGENE; PENINSULA; GLACIATION; INDICATORS; INITIATION; STABILITY; EVOLUTION; PLIOCENE;

D O I：

10.1016/j.palaeo.2009.01.011

中图分类号：

P9 [自然地理学];

学科分类号：

0705 ; 070501 ;

摘要：

Sediments recovered from a drift deposit lying along the Pacific margin of the Antarctic Peninsula, (ODP Leg 178, Site 1095) provide a physical record of the Antarctic Circumpolar Current since late Miocene time. Determination of the strength of the magnetic fabric, anisotropy of magnetic susceptibility, provides a proxy for current strength. Fabric strength declines throughout the record from high values in the late Miocene; a pronounced step occurs between 5.0 and 5.5 Ma, and values decrease more gradually since about 3.0 Ma. The mass accumulation rate of terrigenous sediment derived from the Antarctic Peninsula indicates stabilization of the Antarctic Peninsula Ice Cap prior to about 8.5 Ma. (c) 2009 Elsevier B.V. All rights reserved.

引用

页码：28 / 36

页数：9

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