Gabbro Akarem, Eastern Desert, Egypt: Cu-Ni-PGE mineralization in a concentrically zoned mafic-ultramafic complex

2001 ◽  
Vol 36 (1) ◽  
pp. 58-71 ◽  
Author(s):  
Hassan M. Helmy ◽  
Aberra Mogessie
Keyword(s):  
Eastern Desert ◽  
Pge Mineralization ◽  
Ultramafic Complex

scholarly journals The Troia–Pedra Branca mafic–ultramafic complex, Borborema Province, Brazil: Record of 2.04 Ga post–collisional Alaskan–type magmatism and PGE mineralization

2021 ◽  
Vol 4 (2) ◽  
pp. 147-178
Author(s):  
Felipe Grandjean da Costa ◽  
◽  
Wagner Amaral ◽  
Hector Barrueto ◽  
João Naleto ◽  
...  
Keyword(s):  
Borborema Province ◽  
Pge Mineralization ◽  
Ultramafic Complex

Tsumoite (BiTe) and associated Ni-PGE mineralization from Gondpipri mafic-ultramafic complex, Bastar Craton, Central India: mineralogy and genetic significance

2014 ◽  
Vol 6 (4) ◽  
Author(s):  
M. Dora ◽  
H. Singh ◽  
A. Kundu ◽  
M. Shareef ◽  
K. Randive ◽  
...  
Keyword(s):  
Total Concentration ◽  
Central India ◽  
Olivine Gabbro ◽  
Pge Mineralization ◽  
Ultramafic Complex ◽  
Mineral Assemblages ◽  
Hydrothermal Remobilization ◽  
Two Stages ◽  
Host Rocks

AbstractThis paper reports the occurrence of Tsumoite (a bismuth telluride) in the Heti Cu-Ni-PGM prospect, Gondpipri mafic-ultramafic complex, Central India. The Gondpipri complex consists of several tectonically dismembered gabbronorite-gabbro-anorthositic gabbro — olivine gabbro -websterite disposed in ∼10 km long tonalite-trondhjemitegranodiorite (TTG) and charnockite-enderbite suite of rocks. The mineralization occurs in the sulphide zone hosted by gabbro variants. The host rocks have been deformed and metamorphosed to granulite grade and subjected to various degrees of hydrothermal alteration. The mineralization comprises chalcopyrite, pentlandite, pyrrhotite, cubanite, millerite, and pyrite. In addition to these, occur (1) tsumoite (2) PGM in the form of moncheite, merenskyite, Pd-mellonite, and Pt-Pd-Te-Bi-Fe-S alloy.The present study indicates that the mineralization occurs in two stages related to: (i) magmatic and (ii) hydrothermal remobilization and transport of Cu-rich sulphides, tsumoite and PGM, and their re-deposition in hydrosilicate alteration zones. It is possible that the mineralization at Heti formed at different stages of bismuth activity under variable fS2, T, and fTe2 conditions due to change in total concentration of Te and S and /or cooling. Since the role of S is limited, Te and cooling are important factor influencing mineralogy and composition of tsumoite and associated mineralization. Mineralization occurs in two different modes of occurrences. The early mineralisation occur as blebs, specks and dissemination of sulphides, viz. pyrrhotite, chalcopyrite, pentlandite and minor pyrite ± PGM, whereas later mineralisation occur as stringers, minor veins of sulphides viz. pyrite, millerite, cubanite, sijenite, tsumoite and ± PGM.Mineral assemblages and textural relationships at Heti has indicated precipitation of tsumoite and associated PGM along fractures and secondary silicates, which confirms their hydrothermal origin.

Alaskan-type nature and PGE mineralization of the Wuxing mafic–ultramafic complex in eastern part of the Central Asian Orogenic belt

2020 ◽  
Vol 123 ◽  
pp. 103566
Author(s):  
Meng-Meng Cui ◽  
Ben-Xun Su ◽  
Jing Wang ◽  
Kai-Yun Chen ◽  
Patrick Asamoah Sakyi ◽  
...  
Keyword(s):  
Orogenic Belt ◽  
Central Asian Orogenic Belt ◽  
Central Asian ◽  
Pge Mineralization ◽  
Ultramafic Complex

Petrology of the Motaghairat mafic–ultramafic complex, Eastern Desert, Egypt: A high-Mg post-collisional extension-related layered intrusion

2016 ◽  
Vol 116 ◽  
pp. 164-180 ◽  
Author(s):  
Ali H. Abdel Halim ◽  
Hassan M. Helmy ◽  
Yasser M. Abd El-Rahman ◽  
Tomoyuki Shibata ◽  
Mahmoud M. El Mahallawi ◽  
...  
Keyword(s):  
Layered Intrusion ◽  
Eastern Desert ◽  
Ultramafic Complex
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