Results 101 to 110 of about 34,613 (225)

Biogeochemical Reconstruction of Authigenic Carbonate Deposits at Methane Seep Site off Krishna‐Godavari (K‐G) Basin, Bay of Bengal

Geochemistry, Geophysics, Geosystems
Active and relic marine methane‐seep sites are widely distributed globally and are distinguished by distinctive geology, biogeochemistry, and ecosystems.
S. P. K. Pillutla, A. Peketi, A. Mazumdar, Mohd. Sadique, K. Sivan, Anjali Zatale, S. Mishra, Swati Verma   +7 more
doaj   +1 more source

Development of Holocene lacustrine microbialites on the Iberian Peninsula: Insights into environmental and depositional controls using X‐ray CT and petrography

Sedimentology, EarlyView.
ABSTRACT Microbial mats and microbialites are common in modern and ancient saline lacustrine environments and are highly responsive to biological and environmental factors. As such, they represent important sources of high‐resolution environmental data across a wide range of geological time. Nonetheless, interpretation of fossil mats is non‐trivial due
Connor Doyle, Juan Pablo Corella, Julia Behnsen, Mario Morellón, Celia Martín‐Puertas, Blas Valero Garcés, Stefan Schröder   +6 more
wiley   +1 more source

Biomineral crystallographic preferred orientation in Solenogastres molluscs (Aplacophora) is controlled by organic templating

Scientific Reports
Aplacophoran molluscs are shell-less and have a worm-like body which is covered by biomineralized sclerites. We investigated sclerite crystallography and the sclerite mosaic of the Solenogastres species Dorymenia sarsii, Anamenia gorgonophila, and ...
J. D. Castro-Claros, X. Yin, C. Salas, E. Griesshaber, S. Hörl, A. G. Checa, W. W. Schmahl   +6 more
doaj   +1 more source

A Late Quaternary record of highstand shedding from an isolated carbonate platform (Juan de Nova, southern Indian Ocean)

The Depositional Record, 2019
A 27 m core collected on the sea floor near Juan de Nova island at 1,909 m depth in the SW Indian Ocean preserves a high‐resolution record of carbonate sediment export to the deep sea over the past 1 Myr.
John W. Counts, Stephan J. Jorry, Natalia Vazquez Riveiros, Gwenael Jouet, Jacques Giraudeau, Sandrine Cheron, Audrey Boissier, Elda Miramontes   +7 more
doaj   +1 more source

The structure of aragonite [PDF]

Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character, 1924
Aragonite has the same composition as calcite, both being crystalline forms of calcium carbonate, CaCO 3 . A comparison of the structures of these two crystals is interesting, because they represent one of the most striking cases of dimorphism amongst minerals.
openaire   +1 more source

Effects of temperature, pH and calcium-to-carbonate ratio on the calcium carbonate polymorphs

Discover Civil Engineering
The precipitation of calcium carbonate (CaCO3) polymorphs (calcite, vaterite, and aragonite) plays a crucial role in tailoring the physicochemical properties of construction materials during mineral carbonation.
Mohd Hanifa, Usha Sharma, P. C. Thapliyal, L. P. Singh   +3 more
doaj   +1 more source

NS Aragonit, sorta soje

, 2022
Broj rešenja: 320-44-2835/2/2020-11 Datum rešenja: 04.03.2022.
Đorđević, Vuk, Miladinović, Jegor, Ćeran, Marina   +2 more
openaire   +1 more source

Mineralogical characteristics of surface sediment in Sulaibikhat Bay, Kuwait

Kuwait Journal of Science, 2013
Surface sediment samples were collected from 35 locations in Sulaibikhat Bay, Kuwait. Grain sizes, total organic carbon (TOC), carbonate and mineralogical data were determined.
HASSAN ALSHEMMARI, ALI M. AL-DOUSARI, LINA TALEBI, ABDUL NABI AL-GHADBAN   +3 more
doaj  

Ocean Acidification in the California Current System [PDF]

Oceanography, 2009
Eastern boundary upwelling systems (EBUS) are naturally more acidic than most of the rest of the surface ocean. Observations of EBUS already show pH values and saturation states with regard to the carbonate mineral aragonite that are as low as those ...
Claudine Hauri, Nicolas Gruber, Gian-Kasper Plattner, Simone Alin, Richard A. Feely, Burke Hales, Patricia A. Wheeler   +6 more
doaj  

The role of river runoff in the Kara Sea surface layer acidification and carbonate system changes

Environmental Research Letters, 2019
This study aims to perform the results of the investigation of the Kara Sea carbonate system (CS) changes and the factors that determine it. The important feature of the Kara Sea water structure is strong stratification caused mainly by the Ob’ and ...
Alexander Polukhin
doaj   +1 more source