Non-steady state phanerozoic carbon and sulfur cycling

非稳态显生界碳硫循环

• 批准号: 261234-2008
• 负责人: Wortmann, UlrichGeorg
• 金额: $ 1.89万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2012
• 资助国家: 加拿大
• 起止时间: 2012-01-01 至 2013-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=496925
• 关键词: Non; steady; state; phanerozoic; carbon

Earth, unlike all other planets of the solar system, is characterized by the active cycling of elements through its atmosphere, hydrosphere and lithosphere. Models describing the Phanerozoic evolution of these cycles ( e.g., the carbon, oxygen and sulfur cycles), usually apply a steady state approach. However, recently published high resolution C and S isotope data (Weissert & Erba 2004, Paytan et al. 2004) can no longer be explained in the context of a steady state system. Non-steady state mass balance models can successfully explain the above data, but require unrealistically large changes to volcanic or weathering fluxes (Paytan et al. 2004). Furthermore, all published hypotheses to date are unable to reconcile the C and S isotope records, a problem which is often referred to as the central problem of C and S isotope geochemistry (Holser et al 1988).

与太阳系所有其他行星不同，地球的特点是元素在大气层、水圈和岩石圈中活跃循环。描述这些循环（例如碳、氧和硫循环）显生宙演化的模型通常采用稳态方法。然而，最近发表的高分辨率 C 和 S 同位素数据（Weissert & Erba 2004，Paytan 等人 2004）无法再在稳态系统的背景下进行解释。非稳态质量平衡模型可以成功地解释上述数据，但需要对火山或风化通量进行不切实际的大变化（Paytan 等人，2004 年）。此外，迄今为止所有已发表的假说都无法协调 C 和 S 同位素记录，这个问题通常被称为 C 和 S 同位素地球化学的中心问题（Holser 等，1988）。