The photogeochemical cycle of Mn oxides on the Earth's surface

A Lu, Y Li, F Liu, Y Liu, H Ye, Z Zhuang, Y Li… - Mineralogical …, 2021 - cambridge.org
Manganese (Mn) oxides have been prevalent on Earth since before the Great Oxidation
Event and the Mn cycle is one of the most important biogeochemical processes on the …

Photoelectric conversion on Earth's surface via widespread Fe-and Mn-mineral coatings

A Lu, Y Li, H Ding, X Xu, Y Li, G Ren… - Proceedings of the …, 2019 - National Acad Sciences
Sunlight drives photosynthesis and associated biological processes, and also influences
inorganic processes that shape Earth's climate and geochemistry. Bacterial solar-to …

An ecophysiological explanation for manganese enrichment in rock varnish

UF Lingappa, CM Yeager, A Sharma… - Proceedings of the …, 2021 - National Acad Sciences
Desert varnish is a dark rock coating that forms in arid environments worldwide. It is highly
and selectively enriched in manganese, the mechanism for which has been a long-standing …

Holocene rock varnish microstratigraphy in the Dead Sea basin and Negev Desert: Chronometric application and climatic implication

T Liu, WS Broecker, SR Hemming, H Roth… - Quaternary Science …, 2025 - Elsevier
Rock varnish microstratigraphies from Holocene geomorphic and geoarchaeological
features in the Dead Sea basin and Negev Desert of the Middle East record past millennial …

Biotic-abiotic mingle in rock varnish formation: A new perspective

AS Chaddha, A Sharma, NK Singh, A Shamsad… - Chemical …, 2024 - Elsevier
Rocks in arid to semi-arid regions all over the world have a naturally occurring coating
called “rock varnish” or “desert varnish” on their surface. These lustrous, black-to-brown …

Mechanisms leading to exceptional niobium concentration during lateritic weathering: the key role of secondary oxides

Q Bollaert, M Chassé, AB Neto, B Baptiste, A Courtin… - Chemical …, 2023 - Elsevier
Niobium (Nb) is considered as one of the most immobile elements during supergene
weathering due to its low solubility and the expected resistance of the pyrochlore mineral …

Natural extracellular electron transfer between semiconducting minerals and electroactive bacterial communities occurred on the rock varnish

G Ren, Y Yan, Y Nie, A Lu, X Wu, Y Li… - Frontiers in …, 2019 - frontiersin.org
Rock varnish is a thin coating enriched with manganese (Mn) and iron (Fe) oxides. The
mineral composition and formation of rock varnish elicit considerable attention from …

Desert landform detection and mapping using a semi-automated object-based image analysis approach

MK Garajeh, B Feizizadeh, Q Weng… - Journal of Arid …, 2022 - Elsevier
Traditional landform modeling approaches are labor-intensive and time-consuming. We
proposed and developed a semi-automated object-based image analysis (OBIA) rule set …

Characteristics of desert varnish from nanometer to micrometer scale: A photo-oxidation model on its formation

X Xu, Y Li, Y Li, A Lu, R Qiao, K Liu, H Ding, C Wang - Chemical Geology, 2019 - Elsevier
Rock varnish is a widespread Mn-rich rock coating commonly developed in arid
environments, but the mechanism for its formation is still under debate. In this study, rock …

A multi-analytical approach to infer mineral–microbial interactions applied to petroglyph sites in the negev desert of israel

L Rabbachin, G Piñar, I Nir, A Kushmaro, MJ Pavan… - Applied Sciences, 2022 - mdpi.com
Petroglyph sites exist all over the world. They are one of the earliest forms of mankind's
expression and a precursor to art. Despite their outstanding value, comprehensive research …