Pretražite po imenu i prezimenu autora, mentora, urednika, prevoditelja

Napredna pretraga

Pregled bibliografske jedinice broj: 930433

40Ar/39Ar ages of crystallization and recrystallization of rock-forming polyhalite in Alpine rocksalt deposits


Leitner, Christoph; Neubauer, Franz; Genser, Johann; Borojević Šoštarić, Sibila; Rantitsch, Gerd
40Ar/39Ar ages of crystallization and recrystallization of rock-forming polyhalite in Alpine rocksalt deposits // Advances in 40Ar/39Ar dating : from archaeology to planetary sciences / Jourdan, F. ; Mark, D. F. ; Verati, C. (ur.).
London: Geological Society, 2014. str. 207-224 doi:10.1144/SP378.5


Naslov
40Ar/39Ar ages of crystallization and recrystallization of rock-forming polyhalite in Alpine rocksalt deposits

Autori
Leitner, Christoph ; Neubauer, Franz ; Genser, Johann ; Borojević Šoštarić, Sibila ; Rantitsch, Gerd

Vrsta, podvrsta i kategorija rada
Poglavlja u knjigama, znanstveni

Knjiga
Advances in 40Ar/39Ar dating : from archaeology to planetary sciences

Urednik/ci
Jourdan, F. ; Mark, D. F. ; Verati, C.

Izdavač
Geological Society

Grad
London

Godina
2014

Raspon stranica
207-224

ISBN
978-1-86239-360-8

ISSN
0305-8719

Ključne riječi
Polyhalite ; argon-argon dating ; Northern Calcareous Alps (Eastern Alps) ; rock salt ; recrystallization

Sažetak
Polyhalite rocks of the evaporitic Haselgebirge Formation are emplaced within a rocksalt–mudrock tectonite. The rheologically weak series served as a major detachment level during nappe stacking of the Northern Calcareous Alps (Eastern Alps). To test the mineral polyhalite [K2Ca2Mg(SO4)4·2H2O] as a useful geochronometer for various diagenetic and deformation fabric types, 40Ar/39Ar age dating was combined with microstructural analysis. Vein infills, polyhalite intergrown with anhydrite and polyhalite within mudrock, crystallized in several stages between c. 235 and 210 Ma. Mylonites of fine-grained polyhalite rock indicate subsequent stages of tectonothermal overprint between c. 155 and 105 Ma, which is roughly consistent with previously measured feldspar and muscovite 40Ar/39Ar data from the region. Illite crystallinity points to temperatures of c. 200 °C. The peak temperature of overprint was at c. 180 °C in the Berchtesgaden mine (vitrinite reflectance, fluid inclusions) and >240 °C in the Altaussee mine (fluid inclusions). These temperatures are below the value of 255 °C, where polyhalite starts to dehydrate. Disturbed age spectra patterns result from multiphase polyhalite growth ; however, single phases and completely recrystallized fabrics yield good results. As in the Alpine test case, polyhalite may characteristically serve as a geochronometer for diagenetic and very-low-grade metamorphic processes.

Izvorni jezik
Engleski

Znanstvena područja
Geologija



POVEZANOST RADA


Ustanove
Rudarsko-geološko-naftni fakultet, Zagreb

Citiraj ovu publikaciju

Leitner, Christoph; Neubauer, Franz; Genser, Johann; Borojević Šoštarić, Sibila; Rantitsch, Gerd
40Ar/39Ar ages of crystallization and recrystallization of rock-forming polyhalite in Alpine rocksalt deposits // Advances in 40Ar/39Ar dating : from archaeology to planetary sciences / Jourdan, F. ; Mark, D. F. ; Verati, C. (ur.).
London: Geological Society, 2014. str. 207-224 doi:10.1144/SP378.5
Leitner, C., Neubauer, F., Genser, J., Borojević Šoštarić, S. & Rantitsch, G. (2014) 40Ar/39Ar ages of crystallization and recrystallization of rock-forming polyhalite in Alpine rocksalt deposits. U: Jourdan, F., Mark, D. & Verati, C. (ur.) Advances in 40Ar/39Ar dating : from archaeology to planetary sciences. London, Geological Society, str. 207-224 doi:10.1144/SP378.5.
@inbook{inbook, year = {2014}, pages = {207-224}, DOI = {10.1144/SP378.5}, keywords = {Polyhalite, argon-argon dating, Northern Calcareous Alps (Eastern Alps), rock salt, recrystallization}, doi = {10.1144/SP378.5}, isbn = {978-1-86239-360-8}, issn = {0305-8719}, title = {40Ar/39Ar ages of crystallization and recrystallization of rock-forming polyhalite in Alpine rocksalt deposits}, keyword = {Polyhalite, argon-argon dating, Northern Calcareous Alps (Eastern Alps), rock salt, recrystallization}, publisher = {Geological Society}, publisherplace = {London} }

Časopis indeksira:


  • Web of Science Core Collection (WoSCC)
    • Book Citation Index - Science (BKCI-S)
  • Scopus


Citati