Search Results - "Gutzmer, J."

A Review of Graphite Beneficiation Techniques by Chehreh Chelgani, S., Rudolph, M., Kratzsch, R., Sandmann, D., Gutzmer, J.

“…Graphite as the most common polymorph of naturally occurring crystalline carbon is required for many different applications such as batteries, refractories,…”
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Challenges of digitalizing the circular economy: Assessment of the state-of-the-art of metallurgical carrier metal platform for lead and its associated technology elements by van Schalkwyk, R.F., Reuter, M.A., Gutzmer, J., Stelter, M.

“…The circular economy (CE) paradigm in its broadest sense is key to our survival as a species. Due to this critical importance, understanding its fundamental…”
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Volume quantification in interphase voxels of ore minerals using 3D imaging by Godinho, J.R.A., Kern, M., Renno, A.D., Gutzmer, J.

“…This contribution presents and validates a new method to correct for the main limitations of volume quantification using X-ray computed tomography: limited…”
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The composition and depositional environments of Mesoarchean iron formations of the West Rand Group of the Witwatersrand Supergroup, South Africa by Smith, Albertus J. B, Beukes, Nicolas J, Gutzmer, Jens

“…This paper documents the sedimentological setting, mineralogy, and geochemistry of several iron formation units interbedded with siliciclastic strata of the…”
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Oncoidal granular iron formation in the Mesoarchaean Pongola Supergroup, southern Africa: Textural and geochemical evidence for biological activity during iron deposition by Smith, A. J. B., Beukes, N. J., Gutzmer, J., Czaja, A. D., Johnson, C. M., Nhleko, N.

“…We document the discovery of the first granular iron formation (GIF) of Archaean age and present textural and geochemical results that suggest these formed…”
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Evidence for an early Archaean granite from Bastar Craton, India by Rajesh, H. M, Mukhopadhyay, J, Beukes, N. J, Gutzmer, J, Belyanin, G. A, Armstrong, R. A

“…Granitoids in the early Archaean are believed to be potassium-poor tonalite-trondhjemite-granodiorite rocks. Only after continental crust attained sufficient…”
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Recovery potential of flotation tailings assessed by spatial modelling of automated mineralogy data by Büttner, P., Osbahr, I., Zimmermann, R., Leißner, T., Satge, L., Gutzmer, J.

“…[Display omitted] •Approach of a geometallurgical 3D-model to illustrate the resource potential.•Combination of geochemical, mineralogical and remote sensing…”
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MLA-based partition curves for magnetic separation by Leißner, T., Bachmann, K., Gutzmer, J., Peuker, U.A.

“…•MLA and magnetic susceptibility data are combined.•A large section transformation is applied to the data.•Bootstrap resampling with replacement is applied to…”
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A multiple sulfur and organic carbon isotope record from non-conglomeratic sedimentary rocks of the Mesoarchean Witwatersrand Supergroup, South Africa by Guy, B.M., Ono, S., Gutzmer, J., Kaufman, A.J., Lin, Y., Fogel, M.L., Beukes, N.J.

“…► Strong tectonic and depofacies control over pyrite distribution, pyrite type, pyrite chemistry, S/C ratios and multiple sulfur and organic carbon isotope…”
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A mineral liberation study of grain boundary fracture based on measurements of the surface exposure after milling by Leißner, T., Hoang, D.H., Rudolph, M., Heinig, T., Bachmann, K., Gutzmer, J., Schubert, H., Peuker, U.A.

“…Minerals can be liberated by random fracture of particles into smaller fragments or by detachment along phase boundaries. These two mechanisms represent…”
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Metal Deportment in Complex Secondary Raw Materials: The Case of Vanadium in Basic Oxygen Furnace Slags by Renno, A. D., Möckel, R., Frenzel, M., Ebert, D., Bachmann, K., Krause, J., Gutzmer, J.

“…With the increasing demand for metalliferous and mineral raw materials and the consequent depletion of the global natural resource base, the possible…”
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Sulfur sources of sedimentary “buckshot” pyrite in the Auriferous Conglomerates of the Mesoarchean Witwatersrand and Ventersdorp Supergroups, Kaapvaal Craton, South Africa by Guy, B. M., Ono, S., Gutzmer, J., Lin, Y., Beukes, N. J.

“…Large rounded pyrite grains (>1 mm), commonly referred to as “buckshot” pyrite grains, are a characteristic feature of the auriferous conglomerates (reefs) in…”
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From BIF to red beds: Sedimentology and sequence stratigraphy of the Paleoproterozoic Koegas Subgroup (South Africa) by Schröder, S., Bedorf, D., Beukes, N.J., Gutzmer, J.

“…The ~ 2.4 Ga old Koegas Subgroup of the Transvaal Supergroup contains siliciclastics and iron formations. It occupies a transitional stratigraphic position…”
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Genesis of high-grade iron ores of the Archean Iron Ore Group around Noamundi, India by Beukes, Nicolas J, Mukhopadhyay, Joydip, Gutzmer, Jens

“…High-grade hematite ores of the Iron Ore Group in the Noamundi area, Jharkhand state, India, are hosted by a laterally extensive, 220-m-thick banded iron…”
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Evaluation of mineral processing by assessment of liberation and upgrading by Leißner, T., Mütze, T., Bachmann, K., Rode, S., Gutzmer, J., Peuker, U.A.

“…•A model to assess the success of separation was taken and refined.•Two new parameters to evaluate liberation and separation have been described.•A third…”
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Strategic evaluations and mining process optimization towards a strong global REE supply chain by Barakos, G., Gutzmer, J., Mischo, H.

“…Rare earth elements (REE) have turned from an inconspicuous group of raw materials to critical commodities in the last decade. The insatiable and continuously…”
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Sedimentary Provenance of the Neoarchean Ventersdorp Supergroup, Southern Africa: Shedding Light on the Evolution of the Kaapvaal Craton during the Neoarchean by Schneiderhan, E., Zimmermann, U., Gutzmer, J., Mezger, K., Armstrong, R.

“…The Ventersdorp Supergroup, an undeformed, subgreenschist-to-greenschist facies volcanosedimentary succession deposited on the Kaapvaal Craton between 2729 and…”
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Spatial and temporal distribution of microbially induced sedimentary structures: A case study from siliciclastic storm deposits of the 2.9 Ga Witwatersrand Supergroup, South Africa by Noffke, Nora, Beukes, Nic, Gutzmer, Jens, Hazen, Robert

“…Microbially induced sedimentary structures (MISS) arise from the interaction of microbial mats with the physical sedimentary dynamics of shallow-marine…”
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Geological variations in the Merensky Reef at Bafokeng Rasimone Platinum Mine and its influence on flotation performance by Smith, A.J.B., Viljoen, K.S., Schouwstra, R., Roberts, J., Schalkwyk, C., Gutzmer, J.

“…•Geological variations in the Merensky Reef influence flotation behaviour.•Coarser, interstitial sulphides in hanging wall pyroxenite will have better…”
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Paleoproterozoic Snowball Earth: Extreme Climatic and Geochemical Global Change and Its Biological Consequences by Kirschvink, Joseph L., Gaidos, Eric J., Bertani, L. Elizabeth, Beukes, Nicholas J., Gutzmer, Jens, Maepa, Linda N., Steinberger, Rachel E.

“…Geological, geophysical, and geochemical data support a theory that Earth experienced several intervals of intense, global glaciation ("snowball Earth"…”
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