Geochemical comparison of ikaite and methane-derived authigenic carbonates recovered from Echigo Bank in the Sea of Japan

A Hiruta, R Matsumoto - Marine Geology, 2022 - Elsevier
This study compares the geochemistry of ikaite (CaCO 3· 6H 2 O) with that of nearby (< 500
m in distance) recovered methane-derived authigenic carbonates (MDACs) of~ 10 mol% Mg …

Composition and origin of authigenic carbonates in the Krishna–Godavari and Mahanadi Basins, eastern continental margin of India

BMA Teichert, JE Johnson, EA Solomon… - Marine and Petroleum …, 2014 - Elsevier
The mineralogical and stable isotopic composition of authigenic carbonates from the
Krishna–Godavari (KG) and Mahanadi Basin provide a deeper insight into the processes …

[HTML][HTML] Anaerobic oxidation of methane and trace-element geochemistry in microbial mat-covered sediments related to methane seepage, northeastern Japan Sea

Y Ota, M Suzumura, A Tsukasaki, A Suzuki… - Chemical …, 2022 - Elsevier
We evaluated the spatial variability of geochemical features, including trace-element cycles,
associated with methane seepage in a knoll off Sakata (called Sakata Knoll) in the eastern …

Seafloor activity and deep-subsurface geology of gas hydrate areas revealed from δ13C of methane-derived authigenic carbonates along the eastern margin of the …

A Hiruta, R Matsumoto - Marine Geology, 2023 - Elsevier
The collection of microbial CH 4 hydrates and methane-derived authigenic carbonates
(MDACs) around Sado Island in the Sea of Japan has recently increased. In this study, the …

Clumped isotope signatures of methane-derived authigenic carbonate presenting equilibrium values of their formation temperatures

N Zhang, M Lin, GT Snyder, Y Kakizaki… - Earth and Planetary …, 2019 - Elsevier
The chemical and stable isotopic composition of methane-derived authigenic carbonate
(MDAC) can be used to document paleoclimate and biogeochemical information in methane …

Archaeal lipid biomarker as a tool to constrain the origin of methane at ancient methane seeps: insight into subsurface fluid flow in the geological past

Y Miyajima, Y Watanabe, AS Goto, RG Jenkins… - Journal of Asian Earth …, 2020 - Elsevier
The origin of methane discharged at ancient methane seeps is a key to understand
subsurface fluid-flow processes in sedimentary basins. The carbon isotopic composition of …

[HTML][HTML] Lessons from lipid biomarkers preserved in methane-seep carbonates from the early Permian of Western Australia

S Wang, D Birgel, N Krake, C Shen, DW Haig… - Chemical …, 2024 - Elsevier
Sulfate-driven anaerobic oxidation of methane (SD-AOM) is the key biogeochemical process
at marine seeps, seafloor environments sustaining lush chemosynthesis-based life. While …

Evidence in the Japan Sea of microdolomite mineralization within gas hydrate microbiomes

GT Snyder, R Matsumoto, Y Suzuki, M Kouduka… - Scientific reports, 2020 - nature.com
Over the past 15 years, massive gas hydrate deposits have been studied extensively in
Joetsu Basin, Japan Sea, where they are associated primarily with active gas chimney …

Microbial traces found in microdolomite associated with seep-related shallow gas hydrate

F Shiraishi, T Akimoto, N Tomioka… - Frontiers in Earth …, 2023 - frontiersin.org
Recently, microdolomite grains with a diameter of about 30–150 μm were discovered within
seep-related shallow gas hydrate in the eastern margin of the Japan Sea, and the …

[HTML][HTML] Methane diffusion affects characteristics of benthic communities in and around microbial mat-covered sediments in the northeastern Japan sea

Y Ota, A Iguchi, M Nishijima, R Mukai, M Suzumura… - Chemosphere, 2024 - Elsevier
We investigated relationships between features of benthic macrofaunal communities and
geochemical parameters in and around microbial mat-covered sediments associated with a …