Large-scale metal zoning in a late-Precambrian skarn-type mineralization, Wadi Kid, SE Sinai, Egypt
2013; Elsevier BV; Volume: 90; Linguagem: Inglês
10.1016/j.jafrearsci.2013.11.015
ISSN1879-1956
AutoresHassan M. Helmy, I.M. Shalaby, Hassan B. Abdel Rahman,
Tópico(s)earthquake and tectonic studies
ResumoA 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 facies metamorphism (2.1–4.2 kbar and 500–620 °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.
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