کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10224377 1701100 2018 51 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Hydrothermal evolution of granitoid-hosted gold mineralization in gidami area: An example for orogenic-gold deposits in Egypt
ترجمه فارسی عنوان
تکامل هیدروترمال کانی سازی طلا گرانیتویید در ناحیه گیدامی: نمونه ای برای رسوب های ارگانیک-طلای در مصر
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی
چکیده انگلیسی
Three types of fluid inclusions are recognized at the core and rim of the auriferous quartz vein as follows: 1) Two phases aqueous (H2O-NaCl ± KCl), 2) Two phases aqueous (H2ONaCl ± MgCl2), and 3) Three phases aqueous-carbonic (H2O-NaCl-CO2±CH4) fluid inclusions. Isochores intersection from fluid inclusions data outlines that, the Gidami gold deposits are of the mesothermal type formed at temperatures range between (270-300 °C), and pressure (750-850 bar) corresponds to a depth around 3 km (assuming pure lithostatic pressure). The ore-bearing fluids are supposed to be sourced mainly by fluids of metamorphic and meteoric origin. However, criteria of partial mixing with water of magmatic signatures has been proposed during fluid evolution. The transportation of gold was in form of bisulphide compounds in moderately reduced, neutral to weakly alkaline environment and then the precipitation occurred as a result of changing in Eh and pH conditions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of African Earth Sciences - Volume 146, October 2018, Pages 132-149
نویسندگان
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