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Marián Putiš, Yue-Heng Yang, Tomáš Vaculovič, Matúš Koppa, Xian-Hua Li and Pavel Uher
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Dallmeyer R.D., Neubauer F., Handler R
Miłosz A. Huber, Stanisław Hałas, Yuri N. Neradovsky, Tamara B. Bayanova, Artem W. Mokrushin and Lesia Lata
Within these rocks they are associated massive sulfide ore deposits, mainly composed of pyrite and pentlandite, chalcopyrite and breccias containing all the above men-tioned types of rocks. These breccias are composed of crushed rocks of peridotites which are cemented by quartz and sulfides. The microscopic observation indi-cates sulfides such as pyrite, chalcopyrite and secondary altered gabbroids by serpentinization and saussuritization processes ( Fig. 3A , 3B ).
Microphotographs of samples of massive sulfide mineralization from Monchegorsk (sample 2
Azam Entezari Harsini, Seyed A Mazaheri, Saeed Saadat and José F Santos
a porphyritic texture with microlitic groundmass. Plagioclase (25–30 vol. %), olivine (15–20 vol. %), clinopyroxene (10–15 vol. %), opacity hornblende (8–10 vol. %), and magnetite (5–7 vol. %) are the dominant phenocryst phases. Phenocryts occurs as large euhedral crystals, and plagioclases mostly display polysynthetic twins and some of them show slight oscillatory zoning. As well, some clinopyroxens show augite twins ( Fig. 3a ). Furthermore, Olivine grains are replaced by iddingsite and serpentine; opacity hornblendes are replaced by chlorite.
Frederik Kirst, Sascha Sandmann, Thorsten Nagel, Nikolaus Froitzheim and Marian Janák
Tectonic evolution of the southeastern part of the Pohorje Mountains (Eastern Alps, Slovenia)
Field relations and deformation structures in the southeastern part of the Pohorje Mountains constrain the tectonic evolution of the Austroalpine high-pressure/ultrahigh pressure (HP/UHP) terrane. The Slovenska Bistrica Ultramafic Complex (SBUC) forms a large (ca. 8 × 1 km size) body of serpentinized harzburgite and dunite including minor garnet peridotite and is associated with partly amphibolitized eclogite bodies. The SBUC occurs in the core of an isoclinal, recumbent, northward closing antiform and is mantled by metasedimentary rocks, mostly gneisses and a few marbles, including isolated eclogite/amphibolite lenses. Before this folding, the SBUC formed the deepest part of the exposed terrane. We interpret the SBUC to be derived from near-MOHO, uppermost mantle which was intruded by gabbros in the subsurface of a Permian rift zone. During Cretaceous intracontinental subduction, the SBUC was most likely part of the footwall plate which experienced HP to UHP metamorphism and was folded during exhumation. In the Miocene, the Pohorje Pluton intruded and, subsequently, the metamorphic rocks together with the pluton were deformed probably due to east-west extension and contemporaneous north-south shortening, thus forming an antiformal metamorphic core complex.
Tijen Üner, Üner Çakir, Yavuz Özdemir and Irem Arat
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Hans-Jürgen Gawlick, Roman Aubrecht, Felix Schlagintweit, Sigrid Missoni and Dušan Plašienka
., Frei D., Báldi-Béke M., Reitner J., Wemmer K., Hrvatović H. & von Eynatten H. 2008: Provenance of the Bosnian Flysch. Swiss J. Geosci. 101, 1, 31–54.
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