Methane and the origin of five-element veins: Mineralogy, age, fluid inclusion chemistry and ore forming processes in the Odenwald, SW Germany

Burisch, Mathias; Gerdes, Axel; Walter, Benjamin F.; Neumann, Udo; Fettel, Michael; Markl, Gregor

doi:10.1016/j.oregeorev.2016.10.033

Cited by 104 publications

(66 citation statements)

References 41 publications

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“…roughly elliptical cloud with moderately light δ 13 C between -2.9 and -7.5‰ and δ 18 O between 13.6 and 18.2‰, while the Usseglio samples plot in a very restricted field with δ 13 C at -7‰ and δ 18 O between 17.3 and 18.7‰, with minimal differences between the Co-Ni-rich and the Co-Ni-poor veins. carbon-only isotopic composition of Fe carbonates from the SW Sardinian and Usseglio vein systems and comparison with isotopic data from the Montevecchio Zn-Pb vein system [30] and from several Co-Ni-rich, five element vein-type ore deposits world-wide [1,7,[78][79][80][81][82][83][84]. Compositional field for Phanerozoic marine limestones after [78].…”

Section: Carbon and Oxygen Isotope Data On Ore-related Carbonatesmentioning

confidence: 99%

“…The available, limited yet precious experimental data on Ni and Co in hydrothermal conditions, e.g., [2][3][4][5], have highlighted a different behavior of these metals in solution and the need of further research for unraveling poorly understood aspects. However, recent investigations on natural ore deposits and related modeling, e.g., [6][7][8], have provided clues about the components of the mineralizing fluids as well as on reaction mechanisms effective for metal deposition. Yet speculations still exist on various issues, including the possible mechanisms of selective enrichment of Co versus Ni and the sources of Co and Ni, which may be multiple and diverse, or exotic, even in fluid-related ore deposits hosted in mafic-ultramafic rocks, as discussed in [9].…”

Section: Introductionmentioning

confidence: 99%

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Factors Controlling Hydrothermal Nickel and Cobalt Mineralization—Some Suggestions from Historical Ore Deposits in Italy

et al. 2019

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We compare three poorly known, historical Ni–Co-bearing hydrothermal deposits in different geological settings in Italy: The Ni–Co–As–Sb–Au-bearing Arburese vein system (SW Sardinia), the Co–Ni–As-rich Usseglio vein system (Piedmont), and the small Cu–Ag–Co–Ni–Pb–Te–Se stockwork at Piazza (Liguria). These deposits share various (mineralogical, chemical, thermal, and stable isotopic) similarities to the Five Element Vein-type ores but only the first two were economic for Co–Ni. The Sardinian Ni-rich veins occur in Paleozoic basement near two Variscan plutons. Like the Co-rich Usseglio vein system, the uneconomic Piazza deposit is hosted in an ophiolite setting anomalous for Co. The Sardinian and Usseglio deposits share a polyphasic assemblage with Ni–Co–As–Sb–Bi followed by Ag-base metal sulfides, in siderite-rich gangue, whereas Piazza shows As-free, Ag–Pb–Te–Se-bearing Co–Ni–Cu sulfides, in prehnite–chlorite gangue. Fluid inclusions indicated Co–Ni arsenide precipitation at ≈170 °C for Usseglio, whereas for the Sardinian system late sulfide deposition occurred within the 52–126 °C range. Ore fluids in both systems are NaCl-CaCl2-bearing basinal brines. The chlorite geothermometer at Piazza provides the range of 200–280 °C for ore deposition from CO2-poor fluids. Enrichments in Se and negative δ13C in carbonates suggest interaction with carbonaceous shales. These deposits involve issues about source rocks, controls on Co/Ni and possible role of arsenic and carbonate components towards economic mineralization.

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Section: Carbon and Oxygen Isotope Data On Ore-related Carbonatesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Factors Controlling Hydrothermal Nickel and Cobalt Mineralization—Some Suggestions from Historical Ore Deposits in Italy

et al. 2019

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“…The deposits of the Czech massive are connected to ekzocontacts of granites and Proterozoic -Lower Paleozoic rocks [8][9][10]. Numerous investigations have also shown similarity in morphology of ore beds and its location, ore mineral associations and others.…”

Section: G E O L O G Ymentioning

confidence: 99%

“…Numerous investigations have also shown similarity in morphology of ore beds and its location, ore mineral associations and others. Apart from these facts, there is also difference in metallogenic trend due to presence of basic rocks and schist rich in organic material and sulfides in the Czech deposits [1,8,10]. During intensive alteration of the surrounding rocks significant part of uranium and associated metals was transformed into mobile form and determined high dispersions of ore components in similar rocks, removing some of them from creation of its negative anomalies.…”

Section: G E O L O G Ymentioning

confidence: 99%

Peculiarities of geological-structural position, composition and origin of the silver-bearing ores of the Cobalt-Gowganda area (Canadian Shield)

Guliy¹,

Kostyuk²

2018

SBNMU

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Purpose. Obtaining new and generalizing previously published results of research studies on geological and structural situation, mineralogical and petrographic compositions and formation peculiarities of ores from deposits of five element formation the Cobalt-Gowganda region (Canada), and comparing it to similar deposits from other world areas.methodology. The research included traditional geological observations with collecting samples of various hosting rocks and ores, mineralogical and petrographic analysis of thin sections and polishes samples with ontogeny modeling of minerals formation and detection of their separate generations, determination of rocks and minerals chemical composition along with measuring their reflective power and thermo electro-motive force of sulfides. Isotopic analysis of carbon and oxygen in carbonates from the deposits has been used for genetic constructions.findings. The results obtained during investigations of regional geology, setting of the ore beds, mineral composition of the ores allow connecting ore mineralization formation in the Cobalt-Gowganda region with the main stages of geological development of the Abitibi greenstone belt, formation of fault systems of different order and cracks, which have promoted circulation of ore-bearing solutions enriched by different components from hosting rocks. Presence of various minerals in concrete places of ores is defined by chemical composition and structure of the initial hosting rocks.originality. Joint characteristic of the deposit model for five element formation in the Cobalt-Gowganda region involving different generations of the ore minerals is developed. They are characterized by various physical properties and data on isotopic composition of the carbon and oxygen from the carbonates, which differentiates them from carbonates of other genetic types.Practical value. It is determined by obtained characteristics of the model silver deposits and their minerals of different associations, which help to estimate possible findings of the similar objects in analogical complexes of the Ukrainian Shield and surrounding territory.

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“…Previous studies of dating carbonates, mostly calcite, focused either directly on the analytical method development (Li et al, 2014;Roberts et al, 2017;Drost et al, 2018;Yokoyama et al, 2018) or a range of applications from dating fault activity to directly dating early-diagenetic cements in ammonites (Coogan et al, 2016;Methner et al, 2016;Burisch et al, 2017;Drake et 40 al., 2017;Goodfellow et al, 2017;Nuriel et al, 2017;Hellwig et al, 2018;Walter et al, 2018;MacDonald et al, 2019;Scardia et al, 2019). Only recently, secondary RMs were routinely analysed (Beaudoin et al, 2018) with data reporting standards following more or less the community derived standards suggested for zircons (Horstwood et al, 2016).…”

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confidence: 99%

New analytical and data evaluation protocols to improve the reliability of U-Pb LA-ICP-MS carbonate dating

Guillong¹,

Wotzlaw²,

Looser³

et al. 2020

Preprint

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Abstract. We document that the reliability of carbonate U-Pb dating by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) is improved by matching the aspect ratio of the LA single hole drilling craters and propagating of long-term excess uncertainty and systematic uncertainties. We investigated the impact of different matrices and ablation crater geometries using U-Pb isotope analyses of one primary (WC-1) and two secondary reference materials (RMs). Validation RMs (VRM) include a previously characterized (ASH-15D) and a new candidate (JT), characterized by ID-TIMS (intercept age: 13.797 ± 0.031 Ma) with excellent agreement to pooled LA-ICP-MS measurements (13.81 ± 0.11 ¦ 0.30 Ma), U concentration of approx. 1 μg/g and 238U/206Pb ratios from 5 to 460, well defining the isochron. Differences in ablation crater depth to diameter ratios (aspect ratio) introduce an offset due to downhole fractionation and/or matrix effects. This effect can be observed either when the crater size between U-Pb RM and sample changes or when the ablation rate for the sample is different than for the RM. Observed deviations are up to 20 % of the final intercept age depending on the degree of crater geometry mismatch. The long-term excess uncertainty was calculated to be in the range of 2 % (ASH-15D) to 2.5 % (JT), and we recommend propagating this uncertainty into the uncertainty of the final results. Additionally, a systematic offset to the ID-TIMS age of 2–3 % was observed for ASH-15D but not for JT. This offset might be due to different ablation rates of ASH-15D compared to the primary RM or remaining matrix effects, even when chosen aspect ratios are similar.

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Methane and the origin of five-element veins: Mineralogy, age, fluid inclusion chemistry and ore forming processes in the Odenwald, SW Germany

Cited by 104 publications

References 41 publications

Factors Controlling Hydrothermal Nickel and Cobalt Mineralization—Some Suggestions from Historical Ore Deposits in Italy

Factors Controlling Hydrothermal Nickel and Cobalt Mineralization—Some Suggestions from Historical Ore Deposits in Italy

Peculiarities of geological-structural position, composition and origin of the silver-bearing ores of the Cobalt-Gowganda area (Canadian Shield)

New analytical and data evaluation protocols to improve the reliability of U-Pb LA-ICP-MS carbonate dating

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