A new magnetic anomaly map of Poland and its contribution to the recognition of crystalline basement rocks

Abstract

A new mag netic anom aly map of Po land and its con tri bu tion to the rec og ni tion of crys talline base ment rocks. Geo log i cal Quar terly, 61 (4): 934-945, doi: 10.7306/gq.1383 Mag netic to tal field mea sure ments ac quired in Po land be tween 1974 and 2011 have been com piled in a new dig i tal da ta base that pro vides a com plete pic ture of mag netic anom a lies of the coun try. The data com pi la tion and fur ther pro cess ing pro cedures used to cre ate the mag netic anom aly da ta base and maps that ac com pany this ar ti cle are briefly sum ma rized. The reduced-to-the-pole and pseudogravity anom aly maps were com puted to ac cu rately lo cate anom a lies above their caus ative bod ies as well as to sim plify anom aly pat terns and em pha size prin ci pal mag netic do mains within the base ment. An in ter preta tion of the mag netic maps re veals a lot of mag netic base ment prov inces and do mains in di cat ing base ment di vi sion into blocks and struc tural el e ments, which are im por tant for un der stand ing the re gional tec tonic set ting of Po land.Key words: mag netom etry, Earth's to tal mag netic field map, pseudogravity, crys tal line base ment, Po land.

Ideal body analysis of the Pomerania Gravity Low (northern Poland)

“…There fore, a convinc ing in ter pre ta tion of the pos si ble struc ture (-s) re spon si ble for the PGL is hardly pos si ble. It can be merely hy poth e sized that the main source of the neg a tive grav ity anom aly is re lated to a pre dom i nance of fel sic rocks in the Dobrzyñ Do main of Paleoproterozoic age (Petecki and Rosowiecka, 2017;Krzemiñska et al, 2017). Gran ites, found be low the base ment top in a few deep bore holes in the NE part of the PGL, are consis tent with such a gen eral and ten ta tive sup po si tion.…”

Internal structure of the buried Suwałki Anorthosite Massif (East European Craton, NE Poland) based on borehole, magnetic and gravity data combined with new petrological results

“…2). The to tal-field mag netic anom aly was ob tained by sub tract ing the mag ni tude of an ap pro pri ate DGRF (De fin i tive Geo mag netic Ref er ence Field) 1982.5 re gional field from the to tal field mea sure ment (Petecki and Rosowiecka, 2017).…”

“…Mag netic and grav ity maps of the SAM, with lo ca tions of selected bore holes, are shown in Fig ures 2 and 3. The SAM appears mainly as large neg a tive, mag netic (-1700 nT) and gravity (-19 mGal) anom a lies that are sim i lar in size and shape (Królikowski and Petecki, 1995;Królikowski et al, 1998;Petecki and Rosowiecka, 2017). Ac cord ing to the geo log i cal data these anom a lies are re lated to the large monomineralic an or tho site body in the cen tre of the SAM (Juskowiak, 1998).…”

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

“…In the Mazury High, the relationship between shallow igneous massifs and magnetic anomalies has been recognized (Figure 5; e.g. Petecki et al, 2022;Petecki & Rosowiecka, 2017).…”