Reassessment of the Pennsylvanian bio- and chronostratigraphy of the Saar-Lorraine Basin using high-precision U–Pb ages of volcanic ashes

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F25%3A00617546" target="_blank" >RIV/67985530:_____/25:00617546 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11310/25:10498752

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S0166516225000412?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0166516225000412?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.coal.2025.104724" target="_blank" >10.1016/j.coal.2025.104724</a>

Result language

angličtina

Original language name

Reassessment of the Pennsylvanian bio- and chronostratigraphy of the Saar-Lorraine Basin using high-precision U–Pb ages of volcanic ashes

Original language description

Chronostratigraphic calibration of the Westphalian and early Stephanian succession in the Saar-Lorraine Basin ofnGermany and France has been improved using high-precision U–Pb zircon dating of intercalated tonsteinsn(volcanic ashes) in coal seams. The clay mineralogy and elemental composition were determined to specify thensource of these volcanic ashes and the post-depositional weathering processes. Samples selected for dating werentonsteins with homogeneous zircons without zoning to avoid the inherited ages from the volcanic chamber. Fournof them provided concordant ages in agreement with their stratigraphic position. New radiometric ages constrainnthe hiatus below the Holz Conglomerate approximately between 307.9 and 306.0 Ma, that corresponds to thenearly and mid-Cantabrian substage as defined in its type area, the NW Spain. The age of T600 tonstein, whichncorresponds in Saar-Lorraine Basin to the Duckmantian/Bolsovian boundary is fully in agreement with ages ofnthat boundary determined in the Ruhr Basin of the Variscan foreland and in continental basins of the BohemiannMassif. T10 tonstein on top of the Westphalian succession confirms its late Asturian age previously determinednfrom macroflora. T00 tonstein in the Ottweiler Group provided a mid-Barruelian age, which allowed to re-definenmacrofloral biozones in the lower part of that group from Alethopteris zeilleri of Saberian substage to Crenulopterisnlamuriana of Barruelian substage. New U–Pb ages further improved correlation of local lithostratigraphic unitsnwith other basins in Europe and also with global marine-based stages. These new ages allow us to comparenradioisotopically constrained Bayesian age model to metronomic age models from Bolsovian to Barruelian andnshow that the high frequency sequences fall in the range of the precession and obliquity. The sources of thenvolcanic ashes were probably volcanoes in the Vosges and Black Forest massifs. Considered could be also volncanic centers at a larger distance, e.g., the Teplice-Altenberg volcanic complex for Westphalian, Gothard and Aarnmassifs in Alps and the Thüringian Forest in Saxony for Stephanian and Autunian tonsteins. The detrital zirconsnextracted from the sandstones of the Bolsovian deposits and Holz Conglomerate (late Cantabrian) show a widenrange of ages from Precambrian to Ordovician that confirms the northward source of these zircons (Rhenonhercynian zone) mixed with a local source from the Mid-German Crystalline High.

Czech name

—

Czech description

—

Type

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

CEP classification

—

OECD FORD branch

10505 - Geology

Project

<a href="/en/project/GF22-11661K" target="_blank" >GF22-11661K: Towards integrated stratigraphy of the Late Paleozoic in eastern equatorial Pangea</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

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

Name of the periodical

International Journal of Coal Geology

ISSN

0166-5162

e-ISSN

1872-7840

Volume of the periodical

302

Issue of the periodical within the volume

Apr.

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

31

Pages from-to

104724

UT code for WoS article

001433622900001

EID of the result in the Scopus database

2-s2.0-85218354453