DC pole | Wartość | Język |
dc.contributor.author | Szopa, Krzysztof | - |
dc.contributor.author | Sałacińska, Anna | - |
dc.contributor.author | Gumsley, Ashley P. | - |
dc.contributor.author | Chew, David | - |
dc.contributor.author | Petrov, Petko | - |
dc.contributor.author | Gawęda, Aleksandra | - |
dc.contributor.author | Zagórska, Anna | - |
dc.contributor.author | Deput, Ewa | - |
dc.contributor.author | Gospodinov, Nikolay | - |
dc.contributor.author | Banasik, Kamila | - |
dc.date.accessioned | 2020-04-07T09:32:31Z | - |
dc.date.available | 2020-04-07T09:32:31Z | - |
dc.date.issued | 2020 | - |
dc.identifier.citation | "Minerals" Vol. 10, iss. 3 (2020), art. no 266 | pl_PL |
dc.identifier.issn | 2075-163X | - |
dc.identifier.uri | http://hdl.handle.net/20.500.12128/13468 | - |
dc.description.abstract | Southeastern Bulgaria is composed of a variety of rocks from pre-Variscan (ca. 0.3 Ga) to
pre-Alpine sensu lato (ca. 0.15 Ga) time. The Sakar Unit in this region comprises a series of granitoids and
gneisses formed ormetamorphosed during these events. It is cut by a series of post-Variscan hydrothermal
veins, yet lacks pervasiveAlpine deformation. It thus represents a key unit for detecting potential tectonism
associatedwiththe enigmaticCimmerianOrogenic episode, but limitedgeochronologyhasbeenundertaken
on this unit. Here we report age constraints on hydrothermal activity in the Sakar Pluton. The investigated
veins containmainly albite–actinolite–chlorite–apatite–titanite–quartz–tourmaline–epidote and accessory
minerals. The most common accessory minerals are rutile and molybdenite. Apatite and titanite from the
same vein were dated by U–Pb LA–ICP-MS geochronology. These dates are interpreted as crystallization
ages and are 149 7Ma on apatite and 114 1Ma on titanite, respectively. These crystallization ages are
the first to document two stages of hydrothermal activity during the late Jurassic to early Cretaceous, using
U–Pb geochronology, and its association with the Cimmerian orogenesis. The Cimmerian tectono-thermal
episode is well-documented further to the east in the Eastern Strandja Massif granitoids. However,
these are the first documented ages from the western parts of the Strandja Massif, in the Sakar Unit.
These ages also temporally overlap with previously published Ar–Ar and K–Ar cooling ages, and firmly
establish that the Cimmerian orogeny in the studied area included both tectonic and hydrothermal activity.
Such hydrothermal activity likely accounted for the intense albitization found in the Sakar Unit. | pl_PL |
dc.language.iso | en | pl_PL |
dc.rights | Uznanie autorstwa 3.0 Polska | * |
dc.rights.uri | http://creativecommons.org/licenses/by/3.0/pl/ | * |
dc.subject | geochronology | pl_PL |
dc.subject | U–Pb dating | pl_PL |
dc.subject | Cimmerian | pl_PL |
dc.subject | apatite | pl_PL |
dc.subject | titanite | pl_PL |
dc.subject | Sakar | pl_PL |
dc.subject | Bulgaria | pl_PL |
dc.title | Two-Stage Late Jurassic to Early Cretaceous Hydrothermal Activity in the Sakar Unit of Southeastern Bulgaria | pl_PL |
dc.type | info:eu-repo/semantics/article | pl_PL |
dc.identifier.doi | 10.3390/min10030266 | - |
Pojawia się w kolekcji: | Artykuły (WNP)
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