Abstract The rhenium-osmium (187Re-187Os) system is a highly versatile chronometer that regularly applied to wide range of geological and extraterrestrial materials. In addition providing geo- or cosmo-chronological information, the Re-Os can also be used as tracer processes across temporal (millennial gigayear) spatial scales (lower mantle cryosphere). An increasing number sulfide minerals are now routinely dated, which further expands ability this refine mineral exploration models society...

Sediment-hosted ore deposits contribute a significant amount (up to 65%) of the global resources lead and zinc. Among them, Mississippi-Valley type related oil fields often comprise large-scale hydrothermal systems where regional host rocks are stained with disseminated liquid petroleum (crude oil) other organic compounds. Current models for formation those epigenetic Pb-Zn sulphide consider that metals mostly leached from basement their detrital erosional products, transported by oxidized...

Ten sphalerite separates isolated from mineralized samples in proximal and distal positions relative to the proposed main feeder fault systems at Laisvall deposit were used obtain an absolute age determination of this world-class Pb-Zn hosted by autochthonous Ediacaran Lower Cambrian sandstone located currently along erosional front Scandinavian Caledonides northern Sweden. Residue leachate fractions each separate obtained using crush-leaching technique. All correspond formed reduced sulfur...

Abstract The Bou Azzer mining district in the central part of Anti-Atlas belt, Morocco, is renowned worldwide for its serpentinized Neoproterozoic ophiolitic complex that hosts peculiar cobalt-dominated and nickel-rich Co–Ni–Fe arsenide sulfarsenide deposits with significant credits gold copper. mine satellite deposits, which are spatially associated serpentinite bodies tectonically controlled, generally form breccias at contact between serpentinites more competent rock types (e.g. diorite)...

In the magmatic-hydrothermal environment, fluids with similar metal concentrations and sources may yield contrasting mineral assemblages in successive stages of sulphide mineralization. These differences are linked to physico-chemical conditions mineralizing (e.g., T, pH, fS2, fO2) acquired during their interaction country rocks and/or by mixing groundwater. Here, we integrate petrography osmium (Os) isotope (187Os/188Os) geochemistry, discuss novel constraints on magmatic fluid-rock...

Abstract The stable isotope ratios of sulfur ( δ 34 S relative to Vienna Cañon Diablo Troilite) in sulfates and sulfides determined by elemental analysis ratio mass spectrometry (EA/IRMS) have been proven be a remarkable tool for studies the (bio)geochemical cycles modern ancient environments. However, use EA/IRMS measure arsenides sulfarsenides may not straightforward. This difficulty can lead potential health environmental hazards workplace analytical problems such as instrument...

Cobalt arsenide deposits associated with Neoproterozoic serpentinite in Morocco represent the highest-grade cobalt resource worldwide. Yet, genetic models for their origin remain controversial. We report here mineralogical and geochemical evidence arsenide-calcite mineralization at Bou Azzer to constrain temporal framework identify geodynamic trigger mechanisms. To this end, radiometric ages ore minerals are paramount understanding of deposit. New safflorite (CoAs 2 ) rhenium-osmium (Re-Os)...

Löllingite and arsenopyrite aggregates occur in spessartine-almandine garnet rocks (garnetite) metamorphosed to granulite facies, which are spatially associated with Pb-Zn-Ag mineralization the giant Broken Hill deposit, southern Curnamona Province, New South Wales, Australia.Sulfarsenide sulfide minerals comprise löllingite coexisting 6 galena tetrahedrite that interstitial crystals.Löllingite formed first while gold-bearing löllingite, occurs as rare relicts arsenopyrite, was destroyed...

Strata-bound, nonstratiform, epigenetic galena-sphalerite-cement mineralization in Ediacaran-Cambrian sandstone, including the previously mined deposits at Laisvall and Vassbo, occurs along eas ...

The abundance and types of reef-bearing carbonate platforms reflect the evolution Devonian climate, with conspicuous microbial-algal reefs in warm Early Late sponge-coral cooler Middle Devonian. A dolomitized Wenlock-Lower platform hosts epigenetic copper-cobalt-germanium (Cu-Co-Ge) sulfide mineralization at Ruby Creek-Bornite Brooks Range, Alaska. Here, we present rhenium-osmium (Re-Os) radiometric ages molybdenum sulfur (δ

A temporal framework for mineral deposits is essential when addressing the history of their formation and conceptualizing genetic models origin. This knowledge critical to understand how crust-forming processes are related metal accumulations at specific time conditions Earth evolution. To this end, high-precision absolute geochronology utilising rhenium-osmium (Re-Os) radiometric system in sulphide minerals becoming a method choice. Here, we present procedure obtain separates individual...

Given that gold (Au) mostly remained in the incipient Earth mantle until ca. 3.9–3.8 Ga, a "proto-source" of may have been present dominantly mafic crust precursor born through first-stage melting early mantle. In south-westernmost Greenland, fragment North Atlantic Craton is characterised by greenstone belts comprising volcanic and magmatic rocks, harzburgite cumulates were emplaced at <3.19–3.01 Ga (e.g., Tartoq belt). Here, combining detailed sulphide petrography with...

Abstract We provide timestamps for the major zinc-lead (Zn-Pb) Mississippi Valley-type Black Angel deposit (Greenland) based on new pyrite rhenium-osmium (Re-Os) isotope geochemistry data: (1) a Re-Os isochron age 1,884 ± 35 million years ago (Ma – 2σ, 1.8%) subhedral cemented by sphalerite galena in dolomitized clean limestone, and, (2) model 1,828 16 Ma (2σ, 0.9%) epigenetic massive siltstone/mudstone cap rock. Zinc-lead mineralization evaporite-bearing carbonates Karrat Basin took place...

Abstract The ca. 1,500 to 1,325 Ma Mesoproterozoic Belt-Purcell Basin is an exceptionally preserved archive of Earth and its paleoenvironmental conditions. also host world-class base metal sediment-hosted mineralization produced in a variety settings from the rift stage basin evolution through subsequent influence East Kootenay Grenvillian orogenies. mineral potential this has not been fully realized yet. New rhenium-osmium (Re-Os) data presented here for chalcopyrite, pyrite, black shale...

We report rhenium–osmium (Re–Os) isotope data and age information for bornite, chalcocite, chalcopyrite from the Spar Lake Rock Creek copper–silver (Cu–Ag) sediment-hosted deposits in district, Mesoproterozoic Belt–Purcell Basin, Montana, USA. The Re–Os geochronometers chalcocite do not record plausible mineralization ages at deposit, which is currently interpreted to have formed ca. 1410 million years ago (Ma) prior work. However, a isochron date of bornite (253.2 ± 26.9 Ma, n = 6) with an...