کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
5779289 1413771 2017 4 صفحه PDF ندارد دانلود کنید
عنوان انگلیسی مقاله
Fe-Si Oxides Tracing the Ongoing Low-T° Hydrothermal Alteration of Exhumed Serpentinites at the Ultraslow-spreading Southwest Indian Ridge☆
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علم هواشناسی
پیش نمایش صفحه اول مقاله
Fe-Si Oxides Tracing the Ongoing Low-T° Hydrothermal Alteration of Exhumed Serpentinites at the Ultraslow-spreading Southwest Indian Ridge☆
چکیده انگلیسی

On the smooth seafloor of exhumed mantle-rocks of the slow-spreading Southwest Indian Ridge, the secondary oxide and carbonate mineralizations record specific chemical signatures of the alteration of serpentinites by low-temperature hydrothermal seawater-dominated fluids. The uncommon characteristics of Fe-oxides forming nodule cortex or thick encrustments are their high Si, low Mn contents, trace elements (e.g. Cr) and REE behavior. Oxides composition evolves through time. Associated to oxides, carbonates (aragonite, calcite, dolomite) characterize the matrix of young indurated serpentinite breccias found at ridge axis. Such mineralogical and geochemical sequences trace, as proxies, the ongoing mantle-exhumation and serpentinization process linked to the detachment faults, and the late alteration reactions that impact on crust–ocean transfers and oceanic budget.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Procedia Earth and Planetary Science - Volume 17, 2017, Pages 280-283open access
نویسندگان
, , , , ,