Metamorphic decarbonation, silicate weathering and the long-term carbon cycle

被引:84
作者
Bickle, MJ
机构
[1] Department of Earth Sciences, University of Cambridge, Cambridge CB2 3EQ, Downing Street
关键词
D O I
10.1111/j.1365-3121.1996.tb00756.x
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
The seawater Sr-87/Sr-86 curve implies a 50-100 Myr episodicity in weathering rate which requires a corresponding variation in CO2 degassing from the solid earth to the atmosphere. It is proposed that this is caused by orogenesis, which both produces CO2 as a result of metamorphic decarbonation reactions, and consumes extra CO2 as a consequence of erosion-enhanced weathering. Global climate on the geological time-scale is therefore controlled by the difference between the relatively large and variable orogenic-moderated degassing and weathering CO2 fluxes.
引用
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页码:270 / 276
页数:7
相关论文
共 66 条
[1]  
[Anonymous], 1990, CLIM CHANG IPCC SCI
[2]  
BARNES I, 1978, 7839 US GEOL SURV OP
[3]  
BARNES I, 1984, GLOBAL DISTRIBUTION
[4]  
BECK RA, 1995, GEOLOGY, V23, P387, DOI 10.1130/0091-7613(1995)023<0387:OCEAGW>2.3.CO
[5]  
2
[6]   STRATIGRAPHIC EVIDENCE FOR AN EARLY COLLISION BETWEEN NORTHWEST INDIA AND ASIA [J].
BECK, RA ;
BURBANK, DW ;
SERCOMBE, WJ ;
RILEY, GW ;
BARNDT, JK ;
BERRY, JR ;
AFZAL, J ;
KHAN, AM ;
JURGEN, H ;
METJE, J ;
CHEEMA, A ;
SHAFIQUE, NA ;
LAWRENCE, RD ;
KHAN, MA .
NATURE, 1995, 373 (6509) :55-58
[7]   THE CARBONATE-SILICATE GEOCHEMICAL CYCLE AND ITS EFFECT ON ATMOSPHERIC CARBON-DIOXIDE OVER THE PAST 100 MILLION YEARS [J].
BERNER, RA ;
LASAGA, AC ;
GARRELS, RM .
AMERICAN JOURNAL OF SCIENCE, 1983, 283 (07) :641-683
[8]   A MODEL FOR ATMOSPHERIC CO2 OVER PHANEROZOIC TIME [J].
BERNER, RA .
AMERICAN JOURNAL OF SCIENCE, 1991, 291 (04) :339-376
[9]   3GEOCARB-II - A REVISED MODEL OF ATMOSPHERIC CO2 OVER PHANEROZOIC TIME [J].
BERNER, RA .
AMERICAN JOURNAL OF SCIENCE, 1994, 294 (01) :56-91
[10]   STRONTIUM ALTERATION IN THE TROODOS OPHIOLITE - IMPLICATIONS FOR FLUID FLUXES AND GEOCHEMICAL TRANSPORT IN MIDOCEAN RIDGE HYDROTHERMAL SYSTEMS [J].
BICKLE, MJ ;
TEAGLE, DAH .
EARTH AND PLANETARY SCIENCE LETTERS, 1992, 113 (1-2) :219-237