Evidence for glaciation in the Northern Hemisphere back to 44 Ma from ice-rafted debris in the Greenland Sea

被引：99

作者：

Tripati, Aradhna K. ^{[1
]}

Eagle, Robert A. ^{[2
]}

Morton, Andrew ^{[3
]}

Dowdeswell, Julian A. ^{[4
]}

Atkinson, Katie L. ^{[5
]}

Bahe, Yannick ^{[6
]}

Dawber, Caroline F. ^{[1
]}

Khadun, Emma ^{[7
]}

Shaw, Ruth M. H. ^{[1
]}

Shorttle, Oliver ^{[8
]}

Thanabalasundaram, Lavaniya ^{[9
]}

机构：

[1] Univ Cambridge, Dept Earth Sci, Cambridge CB2 3EQ, England

[2] Univ Cambridge, Cambridge Inst Med Res, Cambridge CB2 0XY, England

[3] CASP, Cambridge CB3 0DH, England

[4] Univ Cambridge, Scott Polar Res Inst, Cambridge CB2 1ER, England

[5] Univ Cambridge, St Catherines Coll, Cambridge CB2 1RL, England

[6] Univ Cambridge, Homerton Coll, Cambridge CB2 2PH, England

[7] Univ Cambridge Girton Coll, Cambridge CB3 0JG, England

[8] Univ Cambridge Queens Coll, Cambridge CB3 9ET, England

[9] Ely Sixth Form Coll, Ely CB6 2SH, Cambs, England

来源：

EARTH AND PLANETARY SCIENCE LETTERS | 2008年 / 265卷 / 1-2期

基金：

英国自然环境研究理事会;

关键词：

paleoclimate; Northern Hemisphere glaciation; ice-rafted debris; greenhouse-icehouse transition; Eocene-Oligocene transition; polar climate;

D O I：

10.1016/j.epsl.2007.09.045

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

The widely accepted age estimate for the onset of glaciation in the Northern Hemisphere ranges between 2 and 15 million years ago (Ma). However, recent studies indicate the date for glacial onset may be significantly older. We report the presence of ice-rafted debris (IRD) in similar to 44 to 30 Ma sediments from the Greenland Sea, evidence for glaciation in the North Atlantic during the Middle Eocene to Early Oligocene. Detailed sedimentological evidence indicates that glaciers extended to sea level in the region, allowing icebergs to be produced. IRD may have been sourced from tidewater glaciers, small ice caps, and/or a continental ice sheet. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：112 / 122

页数：11

共 43 条

[1] EVIDENCE FOR MASSIVE DISCHARGES OF ICEBERGS INTO THE NORTH-ATLANTIC OCEAN DURING THE LAST GLACIAL PERIOD [J].

BOND, G ;

HEINRICH, H ;

BROECKER, W ;

LABEYRIE, L ;

MCMANUS, J ;

ANDREWS, J ;

HUON, S ;

JANTSCHIK, R ;

CLASEN, S ;

SIMET, C ;

TEDESCO, K ;

KLAS, M ;

BONANI, G ;

IVY, S .

NATURE, 1992, 360 (6401) :245-249

[2] Rapid stepwise onset of Antarctic glaciation and deeper calcite compensation in the Pacific Ocean [J].

Coxall, HK ;

Wilson, PA ;

Pälike, H ;

Lear, CH ;

Backman, J .

NATURE, 2005, 433 (7021) :53-57

[3]

DALLAND A, 1976, ARB NOR POLARINST, P151

[4] Early Oligocene initiation of North Atlantic Deep Water formation [J].

Davies, R ;

Cartwright, J ;

Pike, J ;

Line, C .

NATURE, 2001, 410 (6831) :917-920

[5] Rapid Cenozoic glaciation of Antarctica induced by declining atmospheric CO2 [J].

DeConto, RM ;

Pollard, D .

NATURE, 2003, 421 (6920) :245-249

[6]

DOWDESWELL JA, 1982, J SEDIMENT PETROL, V52, P1315

[7]

Ehrmann W. U., 1992, SYNTHESIS RESULTS SC, P423

[8] Continental ice in Greenland during the Eocene and Oligocene [J].

Eldrett, James S. ;

Harding, Ian C. ;

Wilson, Paul A. ;

Butler, Emily ;

Roberts, Andrew P. .

NATURE, 2007, 446 (7132) :176-179

[9] Magnetostratigraphic calibration of Eocene-Oligocene dinoflagellate cyst biostratigraphy from the Norwegian-Greenland Seal [J].

Eldrett, JS ;

Harding, IC ;

Firth, JV ;

Roberts, AP .

MARINE GEOLOGY, 2004, 204 (1-2) :91-127

[10]

GILBERT R, 1990, GEOL SOC SPEC PUBL, V53, P105, DOI 10.1144/GSL.SP.1990.053.01.06

← 1 2 3 4 5 →