Alkaline magmatism from the Lublin–Baltic area of Poland (SW slope of the East European Craton)—Manifestation of hitherto unrecognized early Carboniferous igneous province

Our study of boreholes, seismic survey and magnetic data from the region between the Baltic Basin and the Lublin Basin indicates the existence of numerous buried intrusions and effusive complexes, most of them unnoticed so far, together with a few igneous massifs. They are of alkaline character and...

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Bibliographic Details
Published in:Terra nova (Oxford, England) England), 2024-02, Vol.36 (1), p.77-88
Main Authors: Poprawa, Paweł, Nejbert, Krzysztof, Krzywiec, Piotr, Krzemińska, Ewa, Krzemiński, Leszek, Mazur, Stanisław, Słaby, Ewa
Format: Article
Language:English
Subjects:
alkaline igneous province
Boreholes
Carboniferous
Cratons
Decompression
Denudation
East European Craton
Igneous rocks
Magma
Magnetic data
Mississippian
Seismic data
seismic survey
Seismic surveys
Sills
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Summary:Our study of boreholes, seismic survey and magnetic data from the region between the Baltic Basin and the Lublin Basin indicates the existence of numerous buried intrusions and effusive complexes, most of them unnoticed so far, together with a few igneous massifs. They are of alkaline character and developed in a time span of c. 348 to 338 Ma. Deep seismic data reveal the presence of large sills (up to 100 km long) within the crystalline basement and the overlying sedimentary cover, at depths of 7–14 km and 5.5–6.5 km, respectively. All these igneous rocks occur in the coherent region and constitute a hitherto unrecognized Lublin–Baltic Mississippian Igneous Province (>120,000 km2). Its denudation is evidenced by the Mississippian volcaniclastic formations of high thickness, developed in the adjacent basins. Igneous activity was triggered by thermal anomaly and/or mantle decompression caused by stress field reorganization, induced by the Variscan collision.
ISSN:0954-4879
1365-3121
DOI:10.1111/ter.12681