Deformation of the European Plate (58-0 Ma): Evidence from Calcite Twinning Strains
نویسندگان
چکیده
We present a data set of calcite twinning strain results (n = 209 samples; 9919 measured twins) from the internal Alpine nappes northwestward across Alps and foreland to older extensional margin along Atlantic coast in Ireland. Along Northern Ireland, Cretaceous chalks Tertiary basalts are cross-cut by veins offset calcite-filled normal strike-slip faults. Both Irish sample suites 16 with four U-Pb vein ages between 70–42 Ma) record sub-horizontal SW-NE shortening vertical extension no overprint. This is parallel opening Ocean (~58 Ma), this penetrative fabric only observed ~100 km inboard southeast. The younger, collisional orogen (~40 imparted stress–strain regime dominated SE-NW ~1200 northwest preserved Mesozoic limestones 32) France, Germany Britain. layer-parallel (−3.4%, 5% negative expected values) plane thrust (SE-NW) numerous outcrop-scale contractional structures (i.e., folds, faults). Calcite were orientations include both 11) sub-vertical NE-SW vein-parallel 4). strains compared frontal Jura Mountains 9; shortening), Molasse basin 26; layer-normal Pre-Alp 39; Helvetic Penninic (Penninic klippe; n 46; plus striated ~24 calcsilicates Tauern window 4; shortening). provide chronology history European plate 58 Ma through orogen.
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ژورنال
عنوان ژورنال: Geosciences
سال: 2022
ISSN: ['2076-3263']
DOI: https://doi.org/10.3390/geosciences12060254