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Bibliographic and Petrochemical Data Bases for Molybdenite Deposits
"Molybdenum is an incompatible element which is concentrated in the residual phases of crystallizing magmas. Granodiorites and granites are the source rocks for commercial stockwork molybdenite deposits in the western conterminous United States. To understand the geometry, alteration, and geochemistry of these deposits requires a background in igneous petrology, regional tectonics, and hydrothermal processes. The information needed to develop this background is dispersed throughout the geologic literature. Two computer readable data bases have been constructed to assist in the rapid retrieval and utilization of data pertaining to stockwork molybdenite deposits. One data base is a bibliograph...
High-gradient magnetic separation mechanism for separation of chalcopyrite from molybdenite
Removing molybdenite from chalcopyrite by flotation has long been a challenge due to their similar floatability as sulfide minerals. However, the difference in the magnetic susceptibility of the two minerals may be employed to address this challenge. Recently, pulsating high-gradient magnetic separation (PHGMS) has been reported effective as an environmentally friendly and economical strategy for separating chalcopyrite from molybdenite, but the mechanism of their magnetic difference is unclear. The current investigation employed crystal field theory and density functional theory calculations to theoretically elucidate the magnetic properties of these two minerals, and their difference was f...
