Molybdenite Re–Os dating constrains gravitational collapse of the Sveconorwegian orogen, SW Scandinavia

Assessment of the 187Re decay constant by cross calibration of Re–Os molybdenite and U–Pb zircon chronometers in magmatic ore systems

“…h Re-Os data from AIRIE (CT-564A, this study); U-Pb age from Rastas et al (2001). i Re-Os data from AIRIE (CT-332A, Bingen et al, 2006); U-Pb age from Shärer et al (1996). j Re-Os data from AIRIE (CT-210A, this study and Stein et al, 1997a,b); U-Pb age from Mansfeld (1998).…”

“…Molybdenite from quartz veins hosted in granitic gneiss yields ages of 917 ± 3 and 918 ± 3 Ma (Bingen et al, 2006). The origin of the quartz-molybdenite veins at Øvre Myssa is linked to Rogaland magmatism, most likely originating from contact metamorphism of the gneissic host rocks inducing biotite breakdown and molybdenite deposition (Bingen et al, 2006). Although the intrusion (Garsaknatt) adjacent to the molybdenite locality is not dated, U-Pb zircon ages of ca.…”

The Late Mesoproterozoic Sirdal Magmatic Belt, SW Norway: Relationships between magmatism and metamorphism and implications for Sveconorwegian orogenesis

“…In any case, it is likely that previous attempts to delineate the extent of UHT metamorphism around the anorthosite by mapping mineral occurrences in the rocks resulted in mixing these various events (see section on opx-in isograd below). SW Norway is said to have undergone regional high-grade metamorphism between 1030 and 970 Ma (Bingen et al, 2008a), and the exposed crust in that region to have been ductile after 970 Ma during gravitational collapse of the orogen (Bingen et al, 2006). These interpretations stem largely from geochronological work in the SW part of the SMB (e.g., Falkum, 1998), which has undergone ductile deformation at high metamorphic grades.…”

Albitization of Granitic Rocks: The Mechanism of Replacement of Oligoclase by Albite

“…The Precambrian crust of southwestern Scandinavia is divided into several sectors consisting of late Paleoproterozoic to Mesoproterozoic rocks reworked during the Sveconorwegian orogeny (e.g., andersen 2005, Bingen et al 2005, and references therein). the Bamble sector ( Fig.…”