Geochemistry of Upper Cretaceous Sediments of Bozeş Formation (Apuseni Mts., Romania) – Provenance Implications
作者： Luminiţa ZAHARIA , Ramona BĂLC , Cosmin C. STREMŢAN , Adriana SOCACIU
DOI: 10.7306/GQ.1306
关键词: Geology 、 Back-arc basin 、 Heavy mineral 、 Provenance 、 Basement (geology) 、 Geochemistry 、 Sedimentary depositional environment 、 Felsic 、 Source rock 、 Arenite
摘要: A whole-rock geochemical study was carried out on sandstones from the Upper Cretaceous Bozes Formation in southeastern part of Apuseni Mountains (Romania) order to constrain their provenance and depositional setting. The results were compared integrated with previously reported indicators, such as framework composition heavy mineral assemblages. chemical is similar for all samples investigated, limited ranges both major oxides trace elements. are potassic (Na 2 O/K O < 1) can be classified mainly arenites a few greywackes. Their immature relatively mature character revealed by SiO /Al 3 ratios, ranging between 3.90 11.25, well high Sr/Rb ratios. source rocks affected weak moderate alteration, indicated specific index (CIA), values 47 71. detrital material influenced little hydraulic sorting during transportation, while post-depositional effects K-metasomatism. Two potential types identified based studied: felsic magmatic arc recycled, quartzose metasedimentary basement. Our data indicate that setting likely convergent margin. consistent uplifted exhumed Transylvanian basement area.
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