Platinum-group element distribution in chromite ores from ophiolite complexes, western Turkey

Citation
A. Ucurum et al., Platinum-group element distribution in chromite ores from ophiolite complexes, western Turkey, T I MIN M-B, 109, 2000, pp. B112-B120
Citations number
31
Categorie Soggetti
Earth Sciences
Journal title
TRANSACTIONS OF THE INSTITUTION OF MINING AND METALLURGY SECTION B-APPLIEDEARTH SCIENCE
ISSN journal
03717453 → ACNP
Volume
109
Year of publication
2000
Pages
B112 - B120
Database
ISI
SICI code
0371-7453(200005/08)109:<B112:PEDICO>2.0.ZU;2-8
Abstract
Selected chromite mines in western Turkey (Fig. 1) were the focus for a stu dy of platinum-group element (PGE) and Au concentrations in chromite ores a nd host rocks. Forty-six underground chromite mines were sampled in ten dis tricts. The chromite is hosted in peridotite, dunite, serpentinized harzbur gite and Iherzolite rocks of late Jurassic to late Cretaceous age. A total of 113 ore and rock samples were collected and examined. High PGE concentrations are a feature of chromite-rich rocks worldwide in u ltramafic complexes of Alpine type.(1,6,8,23,29) Knowledge of the geology a nd geochemistry of these deposits is, therefore, critical to understanding of the mechanism of PGE mineralization and its genesis. The study area cont ains numerous chromite deposits in a complex, ENE-trending suture zone betw een the Izmir-Ankara ophiolite zone in the north and the Taurides platform in the south. More than 200 chromite occurrences, prospects and mines are s cattered throughout the peridotites, dunites and serpentinized Iherzholite- harzburgites(10).