Generalized conditions of spherical carbonate concretion formation around decaying organic matter in early diagenesis

Abstract Isolated spherical carbonate concretions observed in marine sediments are fascinating natural objet trouve because of their rounded shapes and distinct sharp boundaries. They occur in varied matrices and often contain well preserved fossils. The formation process of such concretions has bee...

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Autores principales:	Hidekazu Yoshida, Koshi Yamamoto, Masayo Minami, Nagayoshi Katsuta, Sirono Sin-ichi, Richard Metcalfe
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/b931a45ce9864d849bdd7a5de3a0b354
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spelling	oai:doaj.org-article:b931a45ce9864d849bdd7a5de3a0b3542021-12-02T15:07:51ZGeneralized conditions of spherical carbonate concretion formation around decaying organic matter in early diagenesis10.1038/s41598-018-24205-52045-2322https://doaj.org/article/b931a45ce9864d849bdd7a5de3a0b3542018-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-24205-5https://doaj.org/toc/2045-2322Abstract Isolated spherical carbonate concretions observed in marine sediments are fascinating natural objet trouve because of their rounded shapes and distinct sharp boundaries. They occur in varied matrices and often contain well preserved fossils. The formation process of such concretions has been explained by diffusion and rapid syn-depositional reactions with organic solutes and other pore water constituents. However, the rates, conditions and formation process of syngenetic spherical concretions are still not fully clear. Based on the examination of different kinds of spherical concretions from several locations in Japan, a diffusion based growth diagram was applied to define the generalized growth conditions of spherical concretions formed around decaying organic matter. All analytical data imply that the spherical concretions formed very rapidly, at least three to four orders of magnitude faster than previously estimated timescales. The values indicate that spherical concretions are preferentially grown within clay- to silt-grade marine sediments deposited in relatively deep (a few tens of metres) environments dominated by diffusive solute transport, very early in diagenesis.Hidekazu YoshidaKoshi YamamotoMasayo MinamiNagayoshi KatsutaSirono Sin-ichiRichard MetcalfeNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-10 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Hidekazu Yoshida Koshi Yamamoto Masayo Minami Nagayoshi Katsuta Sirono Sin-ichi Richard Metcalfe Generalized conditions of spherical carbonate concretion formation around decaying organic matter in early diagenesis
description	Abstract Isolated spherical carbonate concretions observed in marine sediments are fascinating natural objet trouve because of their rounded shapes and distinct sharp boundaries. They occur in varied matrices and often contain well preserved fossils. The formation process of such concretions has been explained by diffusion and rapid syn-depositional reactions with organic solutes and other pore water constituents. However, the rates, conditions and formation process of syngenetic spherical concretions are still not fully clear. Based on the examination of different kinds of spherical concretions from several locations in Japan, a diffusion based growth diagram was applied to define the generalized growth conditions of spherical concretions formed around decaying organic matter. All analytical data imply that the spherical concretions formed very rapidly, at least three to four orders of magnitude faster than previously estimated timescales. The values indicate that spherical concretions are preferentially grown within clay- to silt-grade marine sediments deposited in relatively deep (a few tens of metres) environments dominated by diffusive solute transport, very early in diagenesis.
format	article
author	Hidekazu Yoshida Koshi Yamamoto Masayo Minami Nagayoshi Katsuta Sirono Sin-ichi Richard Metcalfe
author_facet	Hidekazu Yoshida Koshi Yamamoto Masayo Minami Nagayoshi Katsuta Sirono Sin-ichi Richard Metcalfe
author_sort	Hidekazu Yoshida
title	Generalized conditions of spherical carbonate concretion formation around decaying organic matter in early diagenesis
title_short	Generalized conditions of spherical carbonate concretion formation around decaying organic matter in early diagenesis
title_full	Generalized conditions of spherical carbonate concretion formation around decaying organic matter in early diagenesis
title_fullStr	Generalized conditions of spherical carbonate concretion formation around decaying organic matter in early diagenesis
title_full_unstemmed	Generalized conditions of spherical carbonate concretion formation around decaying organic matter in early diagenesis
title_sort	generalized conditions of spherical carbonate concretion formation around decaying organic matter in early diagenesis
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/b931a45ce9864d849bdd7a5de3a0b354
work_keys_str_mv	AT hidekazuyoshida generalizedconditionsofsphericalcarbonateconcretionformationarounddecayingorganicmatterinearlydiagenesis AT koshiyamamoto generalizedconditionsofsphericalcarbonateconcretionformationarounddecayingorganicmatterinearlydiagenesis AT masayominami generalizedconditionsofsphericalcarbonateconcretionformationarounddecayingorganicmatterinearlydiagenesis AT nagayoshikatsuta generalizedconditionsofsphericalcarbonateconcretionformationarounddecayingorganicmatterinearlydiagenesis AT sironosinichi generalizedconditionsofsphericalcarbonateconcretionformationarounddecayingorganicmatterinearlydiagenesis AT richardmetcalfe generalizedconditionsofsphericalcarbonateconcretionformationarounddecayingorganicmatterinearlydiagenesis
_version_	1718388412600287232

Generalized conditions of spherical carbonate concretion formation around decaying organic matter in early diagenesis

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