Crandallite-rich beds of the Libkovice member, most basin, Czech Republic: Climatic extremes or paleogeographic changes at the onset of the Miocene Climatic Optimum?

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388980%3A_____%2F21%3A00547006" target="_blank" >RIV/61388980:_____/21:00547006 - isvavai.cz</a>

Alternative codes found

RIV/67985891:_____/21:00547006 RIV/00025798:_____/21:00000136 RIV/61989592:15310/21:73610496

Result on the web

<a href="http://hdl.handle.net/11104/0323371" target="_blank" >http://hdl.handle.net/11104/0323371</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1344/GeologicaActa2021.19.11" target="_blank" >10.1344/GeologicaActa2021.19.11</a>

Result language

angličtina

Original language name

Crandallite-rich beds of the Libkovice member, most basin, Czech Republic: Climatic extremes or paleogeographic changes at the onset of the Miocene Climatic Optimum?

Original language description

We describe the occurrence and possible origin of rare beds 1–10cm thick and containing 20–70% of crandallite, a Ca-Al phosphate enriched in Sr and Ba, found within otherwise monotonous clay-rich lacustrine sediments of the Most Basin in the Central-European Neogene Ohře Rift system. The beds were formed at ca. 17.31, 17.06, and 16.88Ma, while the entire suite of monotonous clays of the Libkovice Member was deposited between 17.46 and 16.65Ma. Trace-element and organic geochemistry, Ar-Ar geochronology and C-O-Sr isotope systematics are used to infer their source and processes leading to their formation. The most enigmatic aspect of the formation of the crandallite beds is the removal of a huge amount of phosphorus from its biogenic cycle in the lacustrine system, which was otherwise stable for ca. 0.8My. Formation of detritus-poor crandallite beds could result from some exceptional environmental disruptions that hindered transport of fine clastic material to the basin floor. Silicic volcanic activity in the area of the Pannonian Basin could have triggered this disruption. Crandallite could provide evidence of long-lasting droughts and acidification of the exogenic environment, as they are roughly coeval with the onset of the Miocene Climatic Optimum at ca. 17.0Ma.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10511 - Environmental sciences (social aspects to be 5.7)

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Geologica Acta

ISSN

1695-6133

e-ISSN

1696-5728

Volume of the periodical

19

Issue of the periodical within the volume

JUL

Country of publishing house

ES - SPAIN

Number of pages

29

Pages from-to

11

UT code for WoS article

000717139400012

EID of the result in the Scopus database

2-s2.0-85116453973