Dissecting the Re-Os molybdenite geochronometer.

ABSTRACT: Rhenium and osmium isotopes have been used for decades to date the formation of molybdenite (MoS₂), a common mineral in ore deposits and the world's main source of molybdenum and rhenium. Understanding the distribution of parent ¹⁸⁷Re and radiogenic daughter ¹⁸⁷Os isotopes in molybdenite is critical in interpreting isotopic measurements because it can compromise the accurate determination and interpretation of mineralization ages. In order to resolve the controls on the distribution of these elements, chemical and isotope mapping of MoS₂ grains from representative porphyry copper-molybdenum deposits were performed using electron microprobe and nano-scale secondary ion mass spectrometry. Our results show a heterogeneous distribution of ^185,18

SUBMITTER: Barra F 

PROVIDER: S-EPMC5700062 | biostudies-literature | 2017 Nov

REPOSITORIES: biostudies-literature