Omnipresent authigenic calcite distorts Arctic radiocarbon chronology

JE Wollenburg, J Matthiessen, C Vogt… - … Earth & Environment, 2023 - nature.com
As calcareous foraminifera precipitate their shells from the surrounding water mass, they are
the basis of most marine radiocarbon chronologies and paleo-proxies. Nevertheless, post …

Methane-derived authigenic carbonates on the seafloor of the Laptev Sea shelf

MD Kravchishina, AY Lein, MV Flint… - Frontiers in Marine …, 2021 - frontiersin.org
Seafloor authigenic carbonate crusts are widespread in various oceanic and marine
settings, excluding high-latitude basins that are corrosive to carbonate precipitation. Newly …

Cold-seep carbonates of the Laptev Sea continental slope: Constraints from fluid sources and environment of formation

A Ruban, M Rudmin, A Mazurov, D Chernykh… - Chemical …, 2022 - Elsevier
This study presents results of the petrographic, mineralogical, stable isotopes of oxygen and
carbon, and trace element investigation of authigenic carbonates collected at newly …

Evidence for methane seepage in South Atlantic from the occurrence of authigenic gypsum and framboidal pyrite in deep-sea sediments

RC Dantas, MB Hassan, FW Cruz, L Jovane - Marine and Petroleum …, 2022 - Elsevier
An association of authigenic pyrite and gypsum has been found in deep-sea sediments from
a core retrieved on the continental slope of the Santos Basin, South Atlantic. Pyrite occur …

Methane seeps following Early Permian (Sakmarian) deglaciation, interior East Gondwana, Western Australia: Multiphase carbonate cements, distinct carbon-isotope …

DW Haig, A Dillinger, G Playford, R Riera… - Palaeogeography …, 2022 - Elsevier
Shallow-marine methane seeps, described here for the first time from the Australian Upper
Paleozoic, are among few reported globally from the Carboniferous–Permian. Carbonate …

Conflicting estimates of natural geologic methane emissions

BF Thornton, G Etiope, S Schwietzke, AV Milkov… - Elem Sci …, 2021 - online.ucpress.edu
Global bottom-up and top-down estimates of natural, geologic methane (CH4) emissions
(average approximately 45 Tg yr–1) have recently been questioned by near-zero …

Assessing biogeochemical controls on porewater dissolved inorganic carbon cycling in the gas hydrate-bearing sediments of the Makran accretionary wedge …

Y Chen, S Xu, W Liu, Z Zhang, T Yang… - Frontiers in Marine …, 2024 - frontiersin.org
Quantitatively assessing the porewater dissolved inorganic carbon (DIC) cycling in methane-
enriched marine sediments is crucial to understanding the contributions of different carbon …

Petrography and mineralogy of rinded ferrous‐carbonate concretions in the Middle Eocene carbonate rocks: A case study from the Avanah Formation in north‐east …

IS Asaad, AI Al‐Juboury, D Bal Akkoca… - Geological …, 2022 - Wiley Online Library
The spherical rinded concretions in the carbonate rocks of the Avanah Formation (Middle
Eocene) in the Gomaspan section, north‐east Erbil City, northern Iraq have been studied for …

Trace and rare earth element systematics of cold-seep carbonates from the Krishna-Godavari basin: A comparison between isotopically distinct carbonate deposits

M Kocherla, D Ray, M Satyanarayanan, HM João… - Marine Chemistry, 2024 - Elsevier
Mineralogical and isotopically distinct authigenic carbonates from the zones of methane
oxidation and methanogenesis in the cold-seep environment, from the Krishna-Godavari …

Insights into glendonite formation from the upper Oligocene Sagavanirktok Formation, North Slope, Alaska, USA

JW Counts, ML Vickers, MR Stokes… - Journal of …, 2024 - pubs.geoscienceworld.org
The type locality for the upper Oligocene Nuwok Member of the Sagavanirktok Formation
(Carter Creek, North Slope, Alaska, USA) contains an abundant occurrence of glendonite, a …