Structure and evolution of the Carpathian thrust front between Tarnów and Pilzno (Pogórska Wola area, southern Poland) – results of integrated analysis of seismic and borehole data

Krzywiec, P., Oszczypko, N., Bukowski, K., Oszczypko-Clowes, M., Śmigielski, M., Stuart, F. M., Persano, C. and Sinclair, H. D. (2014) Structure and evolution of the Carpathian thrust front between Tarnów and Pilzno (Pogórska Wola area, southern Poland) – results of integrated analysis of seismic and borehole data. Geological Quarterly, 58(3), pp. 409-426. (doi: 10.7306/gq.1189)

Abstract

Seis mic data and core from the shal low car to graphic Pilzno P-7 bore hole were used to con struct a new model of the Carpathian orogenic front be tween Tarnów and Pilzno, in the Pogórska Wola area (south ern Po land). The most ex ter nal, fron tal thrust of the orogenic wedge (the Jaœniny struc ture) was iden ti fied as a syn-depositional fault-prop a ga tion fold de - tached above the Up per Badenian evaporites. Its for ma tion was con trolled by the pres ence of me chan i cally weak foredeep evaporites and by the mor phol ogy of the sub-Mio cene Meso-Pa leo zoic fore land plate (Jaœniny and Pogórska Wola palaeovalleys). The fron tal zone of the Carpathian orogenic wedge (the Skole thrust sheet and the de formed foredeep de - pos its of the Zg³obice thrust sheet) is char ac ter ized by sig nif i cant backthrusting of the foredeep suc ces sion to wards the south, and by the pres ence of a tri an gle zone, with strongly de formed Up per Badenian evaporites of the Wieliczka For ma tion in its core. The tri an gle zone was formed dur ing the lat est thrust ing move ments of the Carpathians. An in di ca tion of the ex is - tence of the tri an gle zone in the vi cin ity of Dêbica has also been pro vided by re in ter pre ta tion of the ar chive re gional geo log i - cal cross-sec tion. The youn gest foredeep de pos its, brought to the sur face above the backthrust, have been dated as Sarmatian (NN7 nannoplankton zone), which in di cates that the lat est thrust move ments within the fron tal Carpathian orogenic in the vi cin ity of Tarnów–Dêbica took place approx. 11–10 mil lion years ago. Thermochronological stud ies (AFT and AHe) in di cated that the foredeep suc ces sion drilled by the Pilzno P-7 bore hole has not been bur ied deeper than 1.5–2 km, which is com pat i ble with re con struc tion based on the seis mic data

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Persano, Professor Cristina
• Authors: Krzywiec, P., Oszczypko, N., Bukowski, K., Oszczypko-Clowes, M., Śmigielski, M., Stuart, F. M., Persano, C., and Sinclair, H. D.
• College/School: College of Science and Engineering > School of Geographical and Earth Sciences
• Journal Name: Geological Quarterly
• Publisher: Polish Geological Institute
• ISSN: 1641-7291
• ISSN (Online): 1641-7291