22 Everyday Geoscience (Posters)

This session will focus on elevating the importance of geoscience through geoscience education (e.g., curricula development, leading fieldwork experiences, etc.) and/or convergence research (e.g., using community-focused research frameworks/methods, community-engaged research, etc.).

Tuesday, 19 May 2026
8:00 AM - 5:30 PM
Alvarado D/E

Magnetic Fabric and Paleomagnetic Constraints on Early Permian Trachyandesite Sill Emplacement at Dworki Quarry, Poland.

Paper number: 22-1
Program: Technical Sessions
Time: 8:00 AM – 8:00 AM

Authors

Abstract

The National Science Foundation - International Research Experience for Students program provides support for a cohort of five students annually to travel internationally to expand their research skills and personal experiences by working collaboratively with our European colleagues. Near the Polish-Czechia border, in the town of Świerki, Poland, is home to two abandoned quarries named Dworki and Świerki. These quarries expose early Permian trachyandesite intrusions that are concordant to the stratified sediments, indicating a sill-like geometry of the intrusion. The quarries expose the floor and upper ceiling contacts of the intrusion throughout the field of study. New geologic mapping and drone imagery reveals sharp intrusive contacts between the late Paleozoic sedimentary host rocks as well as interfingering apostles as dikes and sills. We report new anisotropy of magnetic susceptibility, rock magnetic, and paleomagnetic data from the abandoned quarry of Dworki. Anisotropy of magnetic susceptibility experiments show a well-defined northeast striking oblate fabric that changes and rotates into parallelism with the country rock contact. The magnetic foliation planes dip steeply east and west. Curie point experiments reveal temperature estimates between 487C to 531C suggesting a moderate Ti titanomagnetite mineral phase. The demagnetization behavior of all samples reveals multi component magnetization directions that are very well-defined and isolated over a range of applied demagnetizing fields. The paleomagnetic directional data indicate that some samples are consistent with an early Permian field, while others yield results that deviate significantly from the early Permian expected field direction. Some sites yield directional data that are near the present-day field direction for the site location. Overall, the majority of sites yield shallow positive and negative inclinations consistent with an early Permian field and declinations to the northeast and south-southeast. The Dworki (and Świerki) intrusions appear to selectively preserve a reliable record of the early Permian magnetic field at the time of formation. Collectively, these data provide constraints of the timing, igneous geometry, and magma emplacement patterns.

Geological Society of America Abstracts with Programs. Vol. 58, No. 4

doi: 10.1130/abs/2026RM-410687

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