Dolomitisation and brecciation along fault zones in the Cantabrian mountains

• Verfasst von: Grimmer, Jörg O. W. [VerfasserIn]
• Verfasst von: Bakker, Ronald J. [VerfasserIn]
• Verfasst von: Zeeh, Stefan [VerfasserIn]
• Verfasst von: Bechstädt, Thilo [VerfasserIn]
• Titel: Dolomitisation and brecciation along fault zones in the Cantabrian mountains
• Verf.angabe: J.O.W Grimmer, R.J. Bakker, S. Zeeh, T. Bechstädt
• E-Jahr: 2000
• Jahr: June 2000
• Umfang: 6 S.
• Fussnoten: Gesehen am 23.10.2017
• Titel Quelle: Enthalten in: Journal of geochemical exploration
• Ort Quelle: Amsterdam : Elsevier Science, 1972
• Jahr Quelle: 2000
• Band/Heft Quelle: 69/70(2000), Seite 153-158
• DOI: doi:10.1016/S0375-6742(00)00122-9
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: barcaliente Fm
• Sach-SW: (de-)dolomitisation
• Sach-SW: Fluid inclusions
• Sach-SW: tectonic breccia
• K10plus-PPN: 1564649016

Abstract

Dolomitisation, brecciation, and dedolomitisation occurring in fault zones in the Variscan fold and thrust belt in the Cantabrian Zone (Northern Spain) in three different tectonic units (Ponga, Picos de Europa and Esla) have been investigated and compared. Cementation patterns are similar in all units: dolomite cements always predate calcite cements in brecciated limestone (Barcaliente Fm.). Moreover, carbon and oxygen isotopic composition trends are comparable. However, the precipitating fluids are distinct in each fault zone, as evidenced by microthermometry and Raman spectroscopy. The evolution of the fault zones is illustrated by the precipitation of cements from different types of circulating fluids in several pulses.