Carbonate Precipitation Induced by Serpentinization on the Mid-Atlantic Ridge

大西洋中脊蛇纹石化作用引起的碳酸盐沉淀

• 批准号: 5441317
• 负责人: Professor Dr. Jörn Peckmann
• 金额: --
• 依托单位: Institut für Geologie
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2005
• 资助国家: 德国
• 起止时间: 2004-12-31 至 2008-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5441317?language=en
• 关键词: Carbonate; Precipitation; Induced; Serpentinization; Mid

... It is the aim of this project to reconstruct the genesis of these carbonates and to understand the factors triggering their precipitation. ... The proposed project will test, if biogeochemical cycling of methane-derived carbon and, in particular, anaerobic oxidation of methane favours carbonate formation during serpentinization. This process is indicated by (1) recent evidence for anaerobic oxidation of methane in hydrothermal environments, and (2) Mid-Atlantic Ridge (MAR) calcites depleted in 13C assosicated with mircrobial biofilms. Several rock samples with authigenic carbonate impregnations on serpentinized periodotites and carbonate vein in sulphides and peridotites have been sampled at three different sites (Stations 49, 54, 67 GTV) in the Logatchev Hydrothermal Field between 14°40'N and 14°55'N during R/V Meteor cruise M60/3 (January 14 to February 13, 2004). The recovered samples are most suitable for the proposed project.

..。该项目的目的是重建这些碳酸盐的成因，并了解触发它们沉淀的因素。..。拟议的项目将测试甲烷碳的生物地质化学循环，特别是甲烷的厌氧氧化是否有利于蛇纹岩作用期间碳酸盐的形成。(1)最近的证据表明甲烷在热液环境中被厌氧氧化，以及(2)中大西洋海脊(MAR)方解石与微生物生物膜结合在一起，在13C中亏损。在R/V流星巡航M60/3期间(2004年1月14日至2月13日)，在14°40‘N至14°55’N之间的Logatchev热液场的3个不同地点(49、54、67 GTV站)，采集了几个自生碳酸盐浸染在硫化物和橄榄岩中的蛇纹石和碳酸盐脉上的岩石样品。回收的样品最适合于拟建项目。