Biosilicification drives a decline of dissolved Si in the oceans through geologic time

DJ Conley, PJ Frings, G Fontorbe… - Frontiers in Marine …, 2017‏ - frontiersin.org
Biosilicification has driven variation in the global Si cycle over geologic time. The evolution
of different eukaryotic lineages that convert dissolved Si (DSi) into mineralized structures …

A field guide to finding fossils on Mars

S McMahon, T Bosak, JP Grotzinger… - Journal of …, 2018‏ - Wiley Online Library
The Martian surface is cold, dry, exposed to biologically harmful radiation and apparently
barren today. Nevertheless, there is clear geological evidence for warmer, wetter intervals in …

Oxygen isotope ensemble reveals Earth's seawater, temperature, and carbon cycle history

T Isson, S Rauzi - Science, 2024‏ - science.org
Earth's persistent habitability since the Archean remains poorly understood. Using an
oxygen isotope ensemble approach—comprising shale, iron oxide, carbonate, silica, and …

Silicic volcanism on Mars evidenced by tridymite in high-SiO2 sedimentary rock at Gale crater

RV Morris, DT Vaniman, DF Blake, R Gellert… - Proceedings of the …, 2016‏ - pnas.org
Tridymite, a low-pressure, high-temperature (> 870° C) SiO2 polymorph, was detected in a
drill sample of laminated mudstone (Buckskin) at Marias Pass in Gale crater, Mars, by the …

Exceptional preservation of soft-bodied Ediacara Biota promoted by silica-rich oceans

LG Tarhan, AVS Hood, ML Droser, JG Gehling… - …, 2016‏ - pubs.geoscienceworld.org
Abstract The Ediacara Biota, Earth's earliest fossilized ecosystem of complex, macroscopic,
multicellular organisms, occurs in terminal Ediacaran strata worldwide, yet how the fossils …

Diagenetic silica enrichment and late‐stage groundwater activity in Gale crater, Mars

J Frydenvang, PJ Gasda, JA Hurowitz… - Geophysical …, 2017‏ - Wiley Online Library
Diagenetic silica enrichment in fracture‐associated halos that crosscut lacustrine and
unconformably overlying aeolian sedimentary bedrock is observed on the lower north slope …

Characterisation of a natural quartz crystal as a reference material for microanalytical determination of Ti, Al, Li, Fe, Mn, Ga and Ge

A Audétat, D Garbe‐Schönberg, A Kronz… - Geostandards and …, 2015‏ - Wiley Online Library
A natural smoky quartz crystal from S handong province, C hina, was characterised by laser
ablation ICP‐MS, electron probe microanalysis (EPMA) and solution ICP‐MS to determine …

Influence of hydrothermal and upwelling events on organic matter accumulation in the gas-bearing lower Cambrian shales of the middle Yangtze Block, South China

H Cao, Z Wang, L Dong, Y **ao, L Hu, F Chen… - Marine and Petroleum …, 2023‏ - Elsevier
With onoing studies on the diversification of animals during the early Cambrian in the
Yangtze Block, resource effects associated with environmental changes have started to be …

Paleoweathering, hydrothermal activity and organic matter enrichment during the formation of earliest Cambrian black strata in the northwest Tarim Basin, China

T He, S Lu, W Li, D Sun, W Pan, B Zhang, Z Tan… - Journal of Petroleum …, 2020‏ - Elsevier
The earliest Cambrian black strata are widely deposited in many continents, and attracted
increasing attention from scholars worldwide. Based on detailed investigations of strata from …

[HTML][HTML] The evolution of the marine Si cycle in the Archean-Palaeozoic-an overlooked Si source?

A Jurkowska, E Świerczewska-Gładysz - Earth-Science Reviews, 2024‏ - Elsevier
Marine siliceous deposits of cherts are known to have formed since the Archean and reflect
the biogeochemical Si cycle, comprising the burial of Si in sediments during diagenesis. The …