Heavy minerals from Oligocene sandstones of the Menilite Formation of the Skole Nappe, SE Poland: a tool for provenance specification

Abstract

. (2012) -Heavy min er als from Oligocene sand stones of the Menilite For ma tion of the Skole Nappe, SE Po land: a tool for prov e nance spec i fi ca tion. Geol. Quart., 56 (4): 803-820, doi: 10.7306/gq.1056Heavy min er als from sand stones be long ing mostly to the Boryslav Sand stone and Kliva Sand stone mem bers of the lower part of the Menilite For ma tion (Oligocene) in the north ern part of the Skole Nappe, Pol ish Carpathians are characterized. In the study area, the sed iments were de pos ited in the Rzeszów and Łańcut chan nel zones run ning from the north ern mar gin of the ba sin. The most fre quent heavy min er als in the sand stones ex am ined in clude zir con, tour ma line, rutile, staurolite, kyan ite and gar net. Sin gle grains of an da lu site, sillimanite, ap a tite, epidote, brookite and chrome spinel oc cur in some sam ples. The very small con tent of ap a tite is re lated to long, con tinen tal weath er ing in the source area, which is re ferred to the Pa leo zoic sed i men tary cover of the Małopolska Block and the east ern most part of the Up per Silesian Block. Dif fer ent pres er va tion states, mor phol ogy, de gree of round ness and col our va ri et ies sug gest that the heavy min er als stud ied de rive from var i ous petrographic types in clud ing meta mor phic, ig ne ous and sed i men tary rocks. How ever, the Car bon if er ous and Perm ian con glom er ates and sand stones seem to be the most prob a ble source rocks. Dorota Salata and Al fred Uchman, In sti tute of Geo log i cal Sci ences, Jagiellonian Uni ver sity,

Conventional and high-resolution heavy mineral analyses applied to flysch deposits: comparative provenance studies of the Ropianka (Upper Cretaceous–Paleocene) and Menilite (Oligocene) formations (Skole Nappe, Polish Carpathians)

“…4-6; see also Salata and Uchman, 2012). Sand stones sam pled in the Husów -Gaj and Husów -B¹kowiec sec tions were well-ce mented and re quired me chan i cal crush ing.…”

“…The cal cu lated stan dard de vi a tions of mineral con tents be tween sam ples (s) were: s < 5 for con tent ranges of 10-90%; s < 2 for con tent ranges of 1-5% and s < 0. Salata and Uchman (2012). To avoid mis lead ing dif fer ences emerg ing from the hydrau lic be hav iour of min er als, heavy min eral as sem blages occur ring only in fine-to me dium-grained de pos its were taken into ac count for cur rent com par a tive stud ies.…”

“…To avoid mis lead ing dif fer ences emerg ing from the hydrau lic be hav iour of min er als, heavy min eral as sem blages occur ring only in fine-to me dium-grained de pos its were taken into ac count for cur rent com par a tive stud ies. There fore, the min erals from very-fine grained sand stones of the Hermanowa 1 section of the Menilite For ma tion (Salata and Uchman, 2012) were ex cluded from the cur rent com par a tive stud ies.…”

“…The re sults of con ven tional heavy min eral anal y ses of the Menilite For ma tion, al ready published by Salata and Uchman (2012), have cur rently been supple mented with HRHMA anal y ses and com pared with new heavy min eral data from the Ropianka For ma tion. Such a combi na tion al lows re fined com par a tive stud ies pro vid ing more spe cific data re gard ing the or i gins of heavy min er als from these for ma tions.…”

“…1). Their de scrip tion and con ven tional heavy min eral char ac ter is tics are pro vided by Salata and Uchman (2012).…”