检索结果-南通市图书馆

Experimental evidence of pressure effects on spinel dissolution and peridotite serpentinization kinetics under shallow hydrothermal conditions

引用

Geoscience Frontiers 2024年第2期15卷 236-250页

作者： Yuri de Melo Portella Rommulo Vieira Conceição Tiago Abreu Siqueira Lucas Bonan Gomes Rodrigo Sebastian Iglesias Programa de Pós-Graduação em Geociências(PPGGEO) Universidade Federal do Rio Grande do SulPorto AlegreBrazil Petrobras–Petróleo Brasileiro S.A. Avenida Henrique Valadares 28CentroRio de Janeiro(RJ)20231-030Brazil Instituto do Petróleo e dos Recursos Naturais-PUCRS–Pontifícia Universidade Católica do Rio Grande do Sul 90619-900Porto AlegreBrazil Universidade Federal do Rio Grande do Sul Instituto de GeociênciasLaboratório de Difratometria de Raios XPorto AlegreBrazil Escola Politécnica–PUCRS-Pontifícia Universidade Católica do Rio Grande do Sul 90619-900 Porto AlegreBrazil

Serpentinization reactions are paramount to understand hydro-geothermal activity near plate boundaries and mafic–ultramafic massifs,as well as fluid and element transfer between the Earth’s mantle and ***,fluid-rock element exchange and serpentinization kinetics under shallow hydrothermal conditions is still largely *** we present two constant temperature(230℃)time-series of natural peridotite(77.5%olivine;13.7%enstatite;6.8%diopside;2%spinel)serpentinization experiments:at 13.4 MPa;and 20.7 ***-enriched lizardite was the main secondary mineral in all runs after olivine(olv)and orthopyroxene(opx)serpentinization(without any detectable brucite,talc or magnetite),while primary spinel and diopside partially dissolved during the *** serpentinization stages comprises intrinsically coupled reactions between olivine and enstatite,as Al and Si are progressively transferred from orthopyroxene-derived to olivine-derived serpentine,while the opposite is true for Mg and Fe,with homogenization of serpentines compositions after 40 *** Ni/Cr ratios of serpentines,however,remain diagnostic of the respective primary *** average serpentine content indicates fast serpentinization rates of 0.55 wt.%·day^(-1)(0.26 mmol·day^(-1))and 0.26 wt.%·day^(-1)(0.13 mmol·day^(-1))at 13.4 and 20.7 MPa,*** 2x faster serpentinization kinetics at lower pressure is likely linked to enhanced spinel dissolution leading to one order of magnitude higher available Al,which accelerates olivine serpentinization while delays orthopyroxene ***,time-dependent increase in solid products masses suggests rock volume expands linearly 0.37%±0.01%per serpentine wt.%independently of *** balance constrains suggests olv:opx react at~5:2 and~3:2 M ratios,resulting in Si-deficient and Si-saturated serpentines at the end of the low-pressure series(13.4 MPa)and high-pressure series(20.7 MPa),***

关键词： Serpentine Volume expansion Serpentinization fluids lost city hydrothermal field Serpentinite-hosted hydrothermal systems Hydrogen(H_(2))generation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：