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大洋碳循环的地质演变 被引量:10

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摘要 地球表面各圈层中,大洋是碳循环活跃而容量最大的碳储库,在地质历史上经历了重大的变化.元古代大气圈的氧化,引起了海洋碳酸盐沉积的型变和有机碳δ^(13)C变重;中生代早、中期钙质骨骼浮游生物的繁盛,导致了海水碳酸盐沉积向深海转移和海洋碳同位素加重;元古代末期和新生代晚期的大气CO_2浓度急剧减低,又使得无机碳与有机碳同位素差值大幅度减小.大洋碳储库的地质演变史反映了地圈、生物圈的相互作用,是认识地球系统变化机制的重要切入点;认识地球表层系统中碳循环在地质尺度上的变化,是查明温室效应如何影响人类生存环境长期趋势的前提.
作者 汪品先
出处 《自然科学进展》 北大核心 2006年第11期1361-1370,共10页
基金 国家"九七三"项目资助(批准号:G2000078505)
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参考文献62

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二级参考文献151

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