Large-scale metal zoning in a late-Precambrian skarn-type mineralization, Wadi Kid, SE Sinai, Egypt

被引：13

作者：

Helmy, H. M. ^{[1
]}

Shalaby, I. M. ^{[2
]}

Rahman, H. B. Abdel ^{[2
]}

机构：

[1] Menia Univ, Dept Geol, Menia 61519, Egypt

[2] Geol Survey Egypt, Cairo, Egypt

来源：

JOURNAL OF AFRICAN EARTH SCIENCES | 2014年 / 90卷

关键词：

Wadi Kid; Sinai; Metamorphic evolution; Monazite dating; Precambrian; Skarn mineralization; MASSIVE-SULFIDE DEPOSIT; SOUTHERN EASTERN DESERT; SPHALERITE GEOBAROMETRY; ARSENOPYRITE; GEOCHEMISTRY; METAMORPHISM; EVOLUTION; MINERALS; COMPLEX; AREA;

D O I：

10.1016/j.jafrearsci.2013.11.015

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

A Precambrian skarn-type mineralization is recently discovered in the Wadi Kid area in southeast Sinai, Egypt. Two sulfide ore types define large scale metal zoning; Cu-Zn-Co in calc-silicate rocks and Zn-Pb-As-Ag in metapelites. The sulfides and host rocks underwent amphibolite fades metamorphism (2.1-4.2 kbar and 500-620 degrees C). Dating by the chemical Th-U-total Pb isochrone method yields an Th-Pb isochrone age of 660 +/- 25 Ma for metamorphic monazite from metapelites. Overall structural and textural relationships of silicate and sulfide minerals favor syn-tectonic formation during granitoids emplacement in a continental margin setting. Large-scale metal zoning reflects variable distances from the causative pluton(s). The Wadi Kid area is highly prospective for Cu, Zn, Pb and Ag mineralization. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：77 / 86

页数：10

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