Biotite and K-feldspar Ar/Ar systems from the east-central Peninsular Ranges batholith near 33°N were affected by two distinct phases of Late Cretaceous rapid cooling. The 85-Ma biotite K-Ar isochron separates comparatively shallow rocks in the southwest that record earlier cooling (91–86 Ma) from deeper rocks in the northeast that record later cooling (78–68 Ma). Samples close to 85 Ma isochro...

The San Emigdio and related Pelona, Orocopia, Rand and Sierra de Salinas schists of southern California were underplated beneath the southern Sierra Nevada batholith and adjacent southern California batholith along a shallow segment of the subducting Farallon plate in Late Cretaceous to early Tertiary time. These subduction accretion assemblages represent a regional, deeply exhumed, shallowly d...

GEOTHERM: A finite difference code for testing metamorphic P–T–t paths and tectonic models A finite difference code for testing meta-morphic P–T–t paths and tectonic models, Computers & Geosciences, This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo ...

The prograde metamorphism of eclogites is typically obscured by chemical equilibration at peak conditions and by partial requilibration during retrograde metamorphism. Eclogites from the Eastern Blue Ridge of North Carolina retain evidence of their prograde path in the form of inclusions preserved in garnet. These eclogites, from the vicinity of Bakersville, North Carolina, USA are primarily co...

The Cape Verde archipelago is a group of ocean islands in the Central Atlantic that forms two chains trending northwest and southwest. Several are considered to be volcanically active, with frequent eruptions on Fogo. We examine mineral chemistry thermobarometry southern islands—Santiago, Fogo, Brava—together Cadamosto Seamount. Our objective explore magmatic storage system implications for vol...

Abstract The Rauer Group in East Antarctica is a typical high- to ultrahigh-temperature (HT–UHT) granulite-facies terrane. As UHT metamorphism has been recognized only Mg–Al-rich pelitic granulites from the Mather Paragneiss, regional extent of remains uncertain, which hindered our understanding genesis and tectonic setting Group. In this study, representative samples mafic granulite were selec...

A new data set combining thermobarometry, geo-thermochronology, chronostratigraphic, and structural analyses highlights the tectono-thermal evolution of St. Martin granodiorite from its emplacement to surface exposure. The described vertical motions in this part upper plate Lesser Antilles subduction zone since 30 Myrs are linked migration volcanic arc toward interior. Results suggest that gran...