Evidence map›Paper›PMID 33608584›Full record

ArticleScientific reports2021

Syngenetic rapid growth of ellipsoidal silica concretions with bitumen cores.

Hidekazu Yoshida, Ryusei Kuma, Hitoshi Hasegawa, Nagayoshi Katsuta, Sin-Iti Sirono, Masayo Minami, Shoji Nishimoto, Natsuko Takagi, Seiji Kadowaki, Richard Metcalfe

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Article in Scientific reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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0citing papers in PubMed
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1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

10 authors.

Hidekazu YoshidaUniversity Museum, Nagoya University, Chikusa, Nagoya, Japan. dora@num.nagoya-u.ac.jp.
Ryusei KumaGraduate School of Environmental Studies, Nagoya University, Chikusa, Nagoya, Japan.
Hitoshi HasegawaFaculty of Science and Technology, Kochi University, Kochi, Japan.
Nagayoshi KatsutaFaculty of Education, Gifu University, Yanagido, Gifu, Japan.
Sin-Iti SironoGraduate School of Environmental Studies, Nagoya University, Chikusa, Nagoya, Japan.
Masayo MinamiInstitute of Space-Earth Environmental Research, Nagoya University, Nagoya, Japan.
Shoji NishimotoNagoya City Science Museum, Nagoya, Japan.
Natsuko TakagiFaculty of Science, Nagoya University, Nagoya, Japan.
Seiji KadowakiUniversity Museum, Nagoya University, Chikusa, Nagoya, Japan.
Richard MetcalfeQuintessa, Videcom House, Newtown Road, Henley-on-Thames, Oxfordshire, UK.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Isolated silica concretions in calcareous sediments have unique shapes and distinct sharp boundaries and are considered to form by diagenesis of biogenic siliceous grains. However, the details and rates of syngenetic formation of these spherical concretions are still not fully clear. Here we present a model for concretion growth by diffusion, with chemical buffering involving decomposition of organic matter leading to a pH change in the pore-water and preservation of residual bitumen cores in the concretions. The model is compatible with some pervasive silica precipitation. Based on the observed elemental distributions, C, N, S, bulk carbon isotope and carbon preference index (CPI) measurements of the silica-enriched concretions, bitumen cores and surrounding calcareous rocks, the rate of diffusive concretion growth during early diagenesis is shown using a diffusion-growth diagram. This approach reveals that ellipsoidal SiO

Identifiers

PMID33608584
PMCPMC7895967

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