Serpentinite petrology as a key to understanding peridotite-seawater interactions in different submarine geotectonic settings

蛇纹岩岩石学是了解不同海底大地构造环境中橄榄岩-海水相互作用的关键

• 批准号: 143034134
• 负责人: Professor Dr. Wolfgang Bach
• 金额: --
• 依托单位: Fachgebiet Petrologie der Ozeankruste
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2009
• 资助国家: 德国
• 起止时间: 2008-12-31 至 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/143034134?language=en
• 关键词: Serpentinite; petrology; key; understanding; peridotite

This proposal seeks funds to conduct a systematic and comprehensive study of oceanic serpentinites from mid-ocean ridge, continental rifted margin, and fore arc settings. The composition and associations of secondary minerals will be used as a guide to serpentinization processes. Phase petrology and geochemical reaction path modeling are going to be used in reading the messages stored in serpentinites in terms of gas fugacities of the system, solute activities of intergranular fluids, temperature and overall water flux. The role of the rock composition is going to be explicitly addressed. The results are going to provide unparalleled new insights into the process of serpentinization and its consequences for hydrogen (i.e., food for microbes) production, and petrophysical property evolution during serpentinization. The work is going to be an expansion of studies conducted in serpentinites from Leg 209, which provided many new insights into serpentinization processes. It is a logical and timely step to take this approach and apply it to many other sites, since petrographic descriptions and petrophysical data indicate that the reaction pathways during serpentinization are incredibly variable.

该提案寻求资金，对大洋中脊、大陆裂陷边缘和弧前环境中的大洋蛇纹岩进行系统和全面的研究。次生矿物的组成和组合将被用作蛇纹石化过程的指南。利用相岩石学和地球化学反应路径模拟技术，阅读蛇纹岩中储存的系统气体逸度、粒间流体溶质活度、温度和总水通量等信息。岩石成分的作用将得到明确的解决。这些结果将为蛇纹石化过程及其对氢的影响提供无与伦比的新见解（即，蛇纹岩化过程中微生物食物的产生和岩石物性演化。这项工作将是对第209航次蛇纹岩研究的扩展，为蛇纹岩化过程提供了许多新的见解。采取这种方法并将其应用于许多其他地点是一个合乎逻辑和及时的步骤，因为岩相描述和岩石物理数据表明，蛇纹石化过程中的反应途径是令人难以置信的可变的。

项目成果

Ultramafic clasts from the South Chamorro serpentine mud volcano reveal a polyphase serpentinization history of the Mariana forearc mantle

• DOI: 10.1016/j.lithos.2015.03.015
• 发表时间: 2015-06
• 期刊: Lithos
• 影响因子: 3.5
• 作者: Wolf-Achim Kahl;N. Jöns;W. Bach;F. Klein;J. Alt

Metasomatism within the ocean crust

• DOI: 10.1007/978-3-642-28394-9_8
• 发表时间: 2013
• 作者: W. Bach;N. Jöns;F. Klein

Fluids in the Crust. Experimental constraints on fluid-rock reactions during incipient serpentinization of harzburgite

地壳中的流体 方辉橄榄石早期蛇纹石化过程中流体-岩石反应的实验限制

• DOI: 10.2138/am-2015-5112
• 发表时间: 2015
• 期刊: American Mineralogist
• 影响因子: 3.1
• 作者: Klein F;Grozeva NG;Seewald JS;McCollom T;Humphris SE;Moskowitz B;Berquó TS;Kahl WA
• 通讯作者: Kahl WA

Garnets within geode-like serpentinite veins: Implications for element transport, hydrogen production and life-supporting environment formation

• DOI: 10.1016/j.gca.2014.07.002
• 发表时间: 2014-09
• 期刊: Geochimica et Cosmochimica Acta
• 影响因子: 5
• 作者: O. Plümper;A. Beinlich;W. Bach;E. Janots;H. Austrheim

Compositional controls on hydrogen generation during serpentinization of ultramafic rocks

• DOI: 10.1016/j.lithos.2013.03.008
• 发表时间: 2013-09-15
• 期刊: LITHOS
• 影响因子: 3.5
• 作者: Klein, Frieder;Bach, Wolfgang;McCollom, Thomas M.
• 通讯作者: McCollom, Thomas M.