Dataset Information

Western Carpathian mid-Permian Magmatism: Petrographic, geochemical, and geochronological data.

ABSTRACT: This study presents geochemical and geochronological data from rock samples collected from the Western Carpathian mountains, eastern Slovakia. Granite assemblages that intrude the Gemeric and Veporic Superunits were imaged using a petrographic microscope to determine rock textures and their mineral assemblages. Zircon grains from seven individual portions of the Gemeric granites (Hnilec, Betliar, Elisabeth Mine, Poproč plutons) and one from the Veporic unit (Klenovec pluton) were dated using Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry (LA-ICP-MS) and Secondary Ion Mass Spectrometry (SIMS). Eight individual portions of the Gemeric unit's Betliar pluton and seven from the Klenovec granite were analyzed for major and trace elements using Fusion Inductively Coupled Plasma (ICP) and Fusion ICP-mass spectrometry. We also report detrital zircon ages from a radiolarite from the Meliata Unit that overlies blueschist and harzburgite-lizardite serpentinite assemblages near the city of Dobšiná, Slovakia. We applied X-ray Diffraction to a sample from the serpentine rocks, which reveal the presence of lizardite. The data are available for re-use to compare to future analyses of these Permian-age granites found in the Carpathian Mountains or similar Permiam assemblages elsewhere more broadly. Data reported in this article relates to G. Villaseñor, E.J. Catlos, I. Broska, M. Kohút, Ľ. Hraško, K. Aguilera, T.M. Etzel, J.R. Kyle, and D.F. Stockli, Evidence for widespread mid-Permian magmatic activity related to rifting following the Variscan orogeny (Western Carpathians), 2021, Lithos.

SUBMITTER: Villasenor G

PROVIDER: S-EPMC8100068 | biostudies-literature |

REPOSITORIES: biostudies-literature

ACCESS DATA

Similar Datasets

Project description:The clay mineral assemblages and geochemical compositions of the Permian Talchir and Barakar mudstones of the Raniganj basin, India, have been used to interpret terrestrial paleoclimate. The Talchir Formation presents unequivocal evidences of the Permian global glacial climate, and the overlying Barakar Formation with braided fluvial deposits immediately follows the glacial amelioration stage to a humid warm climate. Sediments unaffected by burial diagenesis and originated from a similar source under contrasting climates are ideal for developing proxies for substantial climate shift. Illite (28.4-63.8%), illite/smectite (0-58.6%, 40-80% illite), chlorite (0-53.9%), and chlorite/smectite (5.6-29.8%) constitute the clay mineral assemblage in the Talchir Formation whereas illite (5.3-78.2%), illite/smectite (trace-34.1%, mostly 60-90% illite), and kaolinite (36.1-86.8%) dominate the clay mineral assemblage in the Barakar Formation. The Talchir mudrocks are enriched in mobile elements and depleted in alumina w.r.t. PAAS, have relatively higher K2O/Al2O3 ratios (~0.3), high ICV (1.12-1.28), and lower CIA values (52.6-65.1) compared to those of the younger Barakar mudstones. The Barakar mudstones are depleted in mobile elements w.r.t. PAAS, have relatively low ICV (0.33-0.62) and K2O/Al2O3 values (0.11-0.16), and higher CIA values (72.9-88.2). Textural, mineralogical immaturity, and rock fragments of different components of the basement seen in the Talchir sandstones show these sediments being a first-cycle sedimentary deposit. The distinctive clay mineral assemblage and major oxide composition of the Talchir mudrocks attest to a unique low intensity chemical weathering in cold arid climate. Significant presence of kaolinite as well as distinctive geochemical characters of the Barakar mudrocks marks a shift in the paleoclimate from cold arid to humid. This climatic shift is further supported by the proportion and composition of illite/smectite across the formations. The relative proportion of chlorite and kaolinite and composition of illite/smectite therefore closely corroborate the significant climate shift, and such proxies, therefore, are useful indicators of climate extremes in the geological record.

Dataset Information

Western Carpathian mid-Permian Magmatism: Petrographic, geochemical, and geochronological data.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets