Web1 feb. 2013 · The sediment underlies shallow (<1 m deep) circum-neutral pH marine water, warmed by rising hydrothermal fluids (maximum reported temperature, 40 °C; Bostrom and Widenfalk, 1984). Analyses of this sediment have revealed that it is biogeochemically stratified, and host to a diverse bacterial community capable of redox cycling of iron, … Web20 okt. 2015 · The sediment core of 268 KS , which was studied by Ramboz et al. (1998) , was likely far away from the hydrothermal orifice, such that it did not contain the barite …
Microbial diversity in shallow-water hydrothermal sediments of …
Web10 apr. 2024 · The hydrothermal Cu/Fe ratio of the sediments can be used as an indicator of the temperature of the venting fluid (Costa et al., 2024 ). The higher Cu/Fe ratio … Web10 dec. 2024 · Hydrothermal vents are one of the important sources of major or trace elements in the ocean. The elemental fluxes, however, may be dynamic due to coastal processes and hydrothermal plumes, especially in shallow-water hydrothermal vents. We collected water samples by using the trace-metal [...] Read more. buchhandlung goethe hafis bonn
Palaeococcus pacificus sp. nov., an archaeon from deep-sea …
Barite with a transparent, tubular form and a high degree of crystallinity was abundantly present in some hydrothermal sediments of group A (Figures 4G,H, 5B). In hydrothermal environments, in general, pure barite is formed by the mixture of vent fluid and seawater (Paytan et al., 2002; Eickmann et al., … Meer weergeven The agglomerative hierarchical clustering (AHC) analysis grouped the surface sediments into three clusters (A, B1, and B2) on the … Meer weergeven Principal component analysis in this study revealed three key components that explained 87% of the total variance (Table 3). Factor 1 … Meer weergeven The off-axis, ultramafic-hosted OVF has been primarily considered to be a low-temperature diffuse venting system (Kim et al., 2024). However, our results, together with … Meer weergeven The δ13C and δ34S values of the surface sediments in the study area show a distinct difference between the sediment groups (Figure 6). The δ13C in the hydrothermal … Meer weergeven WebThe sedimentary processes of an ancient sediment-hosted geothermal system and its implications on hydrocarbon source rocks and accumulation were first identified. Algal bloom induced by subaqueous eruptions is the main cause for episodic deposition of organic matter and extreme heterogeneity in both lithofacies and source-rock distribution. Web20 feb. 2024 · Syntrophoarchaeum spp. also possess beta-oxidation genes for multi-carbon alkane degradation. A global survey of potential multi-carbon alkane metabolism archaea … buchhandlung fontis winterthur