Variscan U-Th-Pb age for stratabound Pb-Zn mineralization in the Bossòst dome (Pyrenean Axial Zone)

نویسندگان

چکیده

In orogens, pinpointing the timing of mineralization is often complex due to superimposition magmatic, metamorphic and tectonic events. Unravelling tectono-metamorphic evolution deformed terranes essential for understanding formation orogenic mineralization. Bossòst dome Pyrenean Axial Zone, undated stratabound Pb-Zn previously considered be SEDEX-like devoid evidence significant remobilization/deformation, was recently interpreted as structurally-controlled by Variscan tectonics. However, relations with poly-magmatic events reported in Zone are still poorly constrained. dome, laser-ablation inductively coupled plasma mass spectrometry (LA-ICPMS) U-Th-Pb dating performed on zircon constrain ages two undeformed granitic dykes, monazite identify both imprint recorded metapelites Bentaillou deposit. late-Carboniferous – early-Permian magmatic (315–280 Ma) commonly found these dykes (307.4 ± 4.7 Ma 283 15 Ma), consistent main event, extensively Zone. Monazite crystals co-genetic textural relationships sphalerite from were dated at 309 11 Ma. We propose that formed during one remobilization event associated first deformation (D1) probable fluid circulation pre-existing metal-rich Ordovician sedimentary levels. Moreover, metapelite rocks (289.1 5.9 290.0 3.8 probably date end high T low P metamorphism late tectonothermal event. Visean-Serpukhovian (340–325 inherited monazites included garnet staurolite, which record magmatic-metamorphic mainly core Based our a regional synthesis, we new model related

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ژورنال

عنوان ژورنال: Ore Geology Reviews

سال: 2021

ISSN: ['0169-1368', '1872-7360']

DOI: https://doi.org/10.1016/j.oregeorev.2021.104503