The Geochemistry of the Platinum-group Elements in Mafic and Ultramafic Rocks

1989 ◽  
pp. 33-43
Keyword(s):  
Platinum Group Elements ◽  
Ultramafic Rocks ◽  
Platinum Group

Platinum-group elements in alpine-type ultramafic rocks and related chromite ores of the main ophiolite belt of the Urals

2009 ◽  
Vol 51 (2) ◽  
pp. 162-178 ◽  
Author(s):  
Yu. A. Volchenko ◽  
V. A. Koroteev ◽  
I. I. Neustroeva
Keyword(s):  
Platinum Group Elements ◽  
Ultramafic Rocks ◽  
The Urals ◽  
Ophiolite Belt ◽  
Platinum Group

Efficiency of a re-usable Carius tube for determination of platinum group elements in ultramafic rocks

2014 ◽  
Vol 33 (1) ◽  
pp. 45-52 ◽  
Author(s):  
Yingying Liu ◽  
Liang Qi ◽  
Zheng Zhao ◽  
Xiaowen Huang ◽  
Yichang Wang
Keyword(s):  
Platinum Group Elements ◽  
Ultramafic Rocks ◽  
Platinum Group

scholarly journals Different Origins of the Fractionation of Platinum-Group Elements in Raobazhai and Bixiling Mafic-Ultramafic Rocks from the Dabie Orogen, Central China

2012 ◽  
Vol 2012 ◽  
pp. 1-11 ◽  
Author(s):  
Qing Liu ◽  
Quanlin Hou ◽  
Liewen Xie ◽  
Hui Li ◽  
Shanqin Ni ◽  
...  
Keyword(s):  
Partial Melting ◽  
Fractional Crystallization ◽  
Platinum Group Elements ◽  
Central China ◽  
Assay Method ◽  
Ultramafic Rocks ◽  
Dabie Orogen ◽  
Fire Assay ◽  
Platinum Group ◽  
Different Origins

Concentrations of the platinum group elements (PGEs), including Ir, Ru, Rh, Pt, and Pd, have been determined for both Raobazhai and Bixiling mafic-ultramafic rocks from the Dabie Orogen by fire assay method. Geochemical compositions suggest that the Raobazhai mafic-ultramafic rocks represent mantle residues after variable degrees of partial melting. They show consistent PGE patterns, in which the IPGEs (i.e., Ir and Ru) are strongly enriched over the PPGEs (i.e., Pt and Pd). Both REE and PGE data of the Raobazhai mafic-ultramafic rocks suggest that they have interacted with slab-derived melts during subduction and/or exhumation. The Bixiling ultramafic rocks were produced through fractional crystallization and cumulation from magmas, which led to the fractionated PGE patterns. During fractional crystallization, Pd is in nonsulfide phases, whereas both Ir and Ru must be compatible in some mantle phases. We suggest that the PGE budgets of the ultramafic rocks could be fractionated by interaction with slab-derived melts and fractional crystallization processes.

Platinum group elements in mafic-ultramafic rocks of the Western Gneiss Terrain, Western Australia

1987 ◽  
Vol 36 (3-4) ◽  
pp. 247-265 ◽  
Author(s):  
M. Cornelius ◽  
E. F. Stumpfl ◽  
D. Gee ◽  
W. Prochaska
Keyword(s):  
Western Australia ◽  
Platinum Group Elements ◽  
Ultramafic Rocks ◽  
Platinum Group

Geochemistry of platinum group elements in mafic-ultramafic rocks of Xinjie intrusion

1999 ◽  
Vol 18 (3) ◽  
pp. 242-249
Author(s):  
Zhang Chengjiang ◽  
Wang Yunliang ◽  
Li Xiaolin ◽  
Xiu Shuzhi ◽  
Huang Yongjian
Keyword(s):  
Platinum Group Elements ◽  
Ultramafic Rocks ◽  
Platinum Group

scholarly journals Geochemistry of Platinum-Group Elements (PGE) in Cerro Matoso and Planeta Rica Ni-Laterite deposits, Northern Colombia

2020 ◽  
Vol 72 (3) ◽  
pp. A201219
Author(s):  
Mónica Tobón ◽  
Marion Weber ◽  
Joaquín A. Proenza ◽  
Thomas Aiglsperger ◽  
Sebastián Betancur ◽  
...  
Keyword(s):  
Noble Metals ◽  
Platinum Group Elements ◽  
Ultramafic Rocks ◽  
Critical Metals ◽  
Ni Alloys ◽  
Recovery Processes ◽  
Framboidal Pyrite ◽  
Platinum Group Minerals ◽  
Platinum Group ◽  
By Products

Platinum-group elements (PGE) are included among the so-called critical metals, and are essential metals for the technological industry. However, there are very few deposits in the world from which these metals can be extracted. The present work investigates three Ni-laterite profiles (hydrous Mg silicate type) formed over the ultramafic rocks of Cerro Matoso and Planeta Rica in Colombia. The main goal is to determine their PGE concentration and distribution, as well as to identify the carrier phases of these noble metals. The highest PGE contents in Cerro Matoso and Planeta Rica are concentrated in the limonite horizon (141–272 ppb), showing a strong decrease towards the saprolite and the underlying serpentinized peridotite (parent rock; < 50 ppb). The highest concentrations correspond to Pt>Ru>Pd and the lowest to Rh<Os<Ir. Such distribution indicates that PGE are mobilized in different proportions by the laterization processes. The high affinity between PGE and Fe favors the formation of PGE-Fe mineral alloys such as the Pt-Ir-Fe-Ni minerals hosted by Fe-oxyhydroxide found in the limonite–saprolite transition zone in Planeta Rica. In addition, in the same zone, nanoparticles of Pt (< 1 µm) were found within framboidal pyrite. Both types of platinum group minerals (PGM) are secondary in origin. In the case of Pt-Ir-Fe-Ni alloys, this interpretation is supported by their morphology and chemical composition, which is comparable with PGE-Fe-Ni alloys found in laterites of Dominican Republic. In the case of Pt nanoparticle, textural relations suggest the neoformation of PGM adhered to the porous edges of altered pyrite. Cerro Matoso and Planeta Rica should be considered as unconventional PGE deposits, if adequate recovery processes can be applied for their recovery as by-products during Ni (+Co) production.

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