Love is in the Earth: A review of tellurium (bio) geochemistry in surface environments

OP Missen, R Ram, SJ Mills, B Etschmann, F Reith… - Earth-Science …, 2020 - Elsevier
Tellurium (Te) is a rare metalloid in the chalcogen group of the Periodic Table. Tellurium is
regularly listed as a critical raw material both due to its increased use in the solar industry …

Cycling of biogenic elements drives biogeochemical gold cycling

SK Sanyal, J Shuster, F Reith - Earth-Science Reviews, 2019 - Elsevier
Microorganisms are key-drivers of carbon-, nitrogen-, sulfur-and metal cycling on Earth.
Through their metabolic activities they directly and indirectly link element cycles. This leads …

[HTML][HTML] Supergene gold transformations of the placer gold deposits from the Gamba district in northern Cameroon: Implications for secondary and nano-particulate …

YB Ketchaya, T Zhou, M Santosh, B Li, JA Quaye… - Ore Geology …, 2024 - Elsevier
The northern part of Cameroon is a Sudanese or Sudano-Sahelian type characterized
mainly by a dry climate, a significant landscape position, and distance from the primary gold …

Evaluation of the contributions of gold derived from hypogene, supergene and surficial processes in the formation of placer gold deposits

RJ Chapman, D Craw, NR Moles, DA Banks… - 2023 - pubs.geoscienceworld.org
Placer gold particles have traditionally been considered as either detrital products of
weathering or authigenic minerals growing within placers. Recent advances in …

Morphological and compositional analysis of alluvial gold: The Fresnedoso gold placer (Spain)

K dos Santos Alves, SB Sánchez, JG Barreiro… - Ore Geology …, 2020 - Elsevier
The Fresnedoso creek gold placer (FGP) in the Moraleja Basin (W Iberian Massif) has been
investigated in terms of morphological, textural and compositional evolution of gold particles …

Topographic gradients and lode gold sourcing recorded by placer gold morphology, geochemistry, and mineral inclusions in the east fork San Gabriel River, California …

EB Melchiorre, J Henderson - Ore Geology Reviews, 2019 - Elsevier
Topography plays a major role in the morphology, geochemistry, and mineral inclusion
profiles of placer gold from the East Fork of the San Gabriel River. These trends are …

Tellurium biogeochemical transformation and cycling in a metalliferous semi-arid environment

OP Missen, B Etschmann, SJ Mills, SK Sanyal… - … et Cosmochimica Acta, 2022 - Elsevier
Abstract Tellurium (Te) is a Critical Mineral and its biogeochemical behaviour has mostly
been interpreted from laboratory-based studies rather than direct field observations, due to …

Dissolution-reprecipitation vs. solid-state diffusion in electrum: Examples from metamorphosed Au-bearing, volcanogenic massive sulfide (VMS) deposits

H Liu, G Beaudoin - American Mineralogist, 2021 - degruyter.com
Abstract Native Au-Ag alloys (electrum) are the predominant precious metal host in Au-
bearing volcanogenic massive sulfide (VMS) deposits. The chemical composition and …

A genomic perspective of metal-resistant bacteria from gold particles: Possible survival mechanisms during gold biogeochemical cycling

SK Sanyal, F Reith, J Shuster - FEMS Microbiology Ecology, 2020 - academic.oup.com
ABSTRACT A bacterial consortium was enriched from gold particles that 'experienced'ca. 80
years of biotransformation within waste-rock piles (Australia). This bacterial consortium was …

Biogeochemical gold cycling selects metal-resistant bacteria that promote gold particle transformation

SK Sanyal, J Shuster, F Reith - FEMS Microbiology Ecology, 2019 - academic.oup.com
Bacteria catalyze the dissolution and re-precipitation of gold, thereby driving the
biogeochemical cycle of gold. Dissolution of gold/silver and re-precipitation of gold …