Specifically, we used LA-ICP-MS pyrite trace element data and Random Forests, an ensemble machine learning supervised classifier, to distinguish barren sedimentary pyrite and five ore deposit categories: iron oxide copper-gold (IOCG), orogenic Au, porphyry Cu, sedimentary exhalative (SEDEX), and volcanic-hosted massive sulfide (VHMS) deposits.

Jun 1, 2019 · content of pyrite approximates the composition of the uid from which it precipitated and the crystallization mechanism, the trace element characteristics can be used to predict the type of...

Nov 1, 2011 · Porous, “barren” pyrite hosts isolated Pb–Bi–Te–Sb–Au–Ag–S NPs (Fig. 5 E). HRTEM images of “barren” pyrite reveal that crystalline NPs are hosted by ordered pyrite that is distorted only within about 50 nm of the NPs (Fig. 5 F).

The barren pyrite (PyIII), which presents as overgrowth matrix cementing early PyI and PyII, has positive δ 34 S V-CDT values (15.5 to 34.6 ‰), suggesting formation via MSR in closed, sulfate-limited environment, most likely following deep burial.

May 1, 2024 · A discriminant analysis (DA), based on multi-element compositions of pyrite, distinguishes iron oxide-apatite (IOA), iron oxide copper-gold (IOCG), skarn Cu-(Fe), porphyry Cu-Mo, orogenic Au, volcanic-hosted massive sulfide (VMS), sedimentary exhalative (SEDEX) deposits, and barren sedimentary pyrite.

116 (sedimentary exhalative) deposits and barren sedimentary pyrite with Discriminant 117 analysis (DA), and build discrimination diagrams to identify and visualize the 118 distinctions among different types of deposits.

In these three techniques, the support vector machine yielded the highest overall accuracy (98% for IOA, IOCG, skarn Cu-Fe, and porphyry Cu-Mo, and 97% for orogenic Au, VMS, SEDEX, and barren sedimentary pyrite) and thus is an appropriate technique in predicting pyrite types.

May 1, 2024 · In these three techniques, the support vector machine yielded the highest overall accuracy (98% for IOA, IOCG, skarn Cu-Fe, and porphyry Cu-Mo, and 97% for orogenic Au, VMS, SEDEX, and barren ...

ensemble machine learning supervised classifier, to distinguish barren sedimentary pyrite and five ore deposit categories: iron oxide copper-gold (IOCG), orogenic Au, porphyry Cu, sedimentary...

Aug 16, 2024 · This study addresses the differences between gold-bearing and barren pyrite particles taken from various ore deposits and utilizes these differences for the selective flotation of gold-bearing pyrite.