Global Geology 2011, 14(1) 15-20 DOI:     ISSN: 1673-9736 CN: 22-1371/P

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Keywords
magmatic sulphide
Wadi Bayhan
mafic-ultramafic intrusion
Authors
Moteea A�� Al-Shameery1
2
PubMed
Article by Moteea A�� Al-Shameery1
Article by 2

Geochemistry and genesis of magmatic PGE-bearing Cu-Ni sulphide deposit in Wadi Bayhan��southeastern Yemen

Moteea A�� Al-Shameery1, 2

1�� College of Earth Sciences��Jilin University��Changchun 130061��China; 2�� Geological Survey and Mineral Resources Board��Sana'a��Yemen

Abstract��

The Wadi Bayhan mafic-ultramafic intrusions associated with magmatic PGE-bearing Cu-Ni sulphide deposit are located in the south margin of the Arabian-Nubian Shield��SW Yemen�� The intrusions consist of dunite�� olivine-pyroxenite��lherzolite��hornblendite��gabbro and gabbronorite�� The dunite and lherzolite are the main host rock for the Cu-Ni ores�� The new data of the chemical compositions of the rocks have SiO2 ( 50%- 53. 6%) ��Al2O3 ( 0-32%) and MgO ( 4%-28%) ��and relatively low TiO2 ( 0-3. 2%) and K2 O + Na2O ( 0. 04% �� 5. 2%) �� The geochemical characteristics indicate that the parental magma is high-magnesium tholeiitic�� Sulfur had reached saturation and immiscible sulfides droplets segregated from silicate magmas before their emplacement��

Keywords�� magmatic sulphide   Wadi Bayhan   mafic-ultramafic intrusion  
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