Abstract The major-element chemical composition of garnet provides valuable petrogenetic information, particularly in metamorphic rocks. When facing detrital garnet, information about the bulk-rock and mineral paragenesis initial garnet-bearing host-rock is absent. This prevents application thermo-barometric techniques calls for quantitative empirical approaches. Here we present a discriminatio...

Abstract Here we describe the structure, high-pressure, low-temperature (HP-LT) metamorphism and tectonic evolution of Briançonnais distal margin units from south Western Alps. The studied area extends southwest Dora-Maira (U)HP basement east-southeast classical nappes. A new structural map accompanied by geological profiles shows thrusting oceanic nappes (Monviso Queyras units) onto (D1 D2 lat...

Physical properties of sediments are commonly used to define subsurface lithofacies and these same physical properties influence subsurface microbial communities. This suggests an (unexploited) opportunity to use the spatial distribution of facies to predict spatial variation in biogeochemically relevant microbial attributes. Here, we characterize three biogeochemical facies-oxidized, reduced, ...

Abstract The Proterozoic Chotanagpur Granite Gneiss Complex (CGGC) at the northern boundary of Central Indian Tectonic Zone (CITZ) eastern shield preserves relics fossilized oceanic back-arc crust. We describe field, petrographical and geochemical characteristics mafic rocks comprising pillow basalts dolerites from Bathani area fringe CGGC, India. consist plagioclase feldspar, hornblende, opaqu...

We have done a geostatistical inversion of seismic data to facies probabilities. As a first step, we invert the seismic data for elastic parameters using the Bayesian AVA inversion method of Buland et. al. (2003). Next, we use an analysis of the uncertainty in the posterior distribution to filter the elastic parameters given in well logs. By comparing these filtered well logs with facies logs, ...

The metamorphic sole rocks at the base of mantle peridotites from the Mersin ophiolite consist of amphibolites and metasedimentary lithologies. Mineral parageneses in the metamorphic sole rocks exhibit amphibolite and greenschist facies assemblages. Geothermobarometric studies based on mineral assemblages and chemical compositions of minerals indicate that average metamorphic temperature during...

Abstract In this contribution, we present new structural, microstructural, fabrics, and geochronological data from the southern Chong Shan complex, one of metamorphic complexes in southeastern Tibetan Plateau that were sheared exhumed during India-Eurasia convergence. The NW-SE–striking complex is comprised a central high-grade zone (Unit I) flanked by two low-grade zones (units II III) on nort...

Between the western and the eastern parts of the southern Alaskan Sanak–Baranof belt there exist variations in pluton spacing, geochronology, geochemistry and metamorphism. All such characteristics can be explained by increase in heat flux towards the eastern parts of the belt. Despite such differences, the initiation of magmatism propagated eastward at a constant rate of 19 cm/year throughout ...

[1] Taiwan’s Hsüehshan range experienced penetrative coaxial deformation within and near the brittle-plastic transition between 6.5 and 3 Ma. This recent and short-lasting deformation in an active, well-studied orogen makes it an ideal natural laboratory for studying crustal rheology. Recrystallized grain size piezometry in quartz and Ti-in-quartz thermobarometry yield peak differential stresse...

The focus of this thesis is the mineralogy, chemistry, and the understanding of the origin of small (1-5 cm diameter) miarolitic cavities observed in two altered andesitic dikes on West Spanish Peak, Colorado. Twenty rock samples were collected for analysis, and from them 42 thin sections were made for petrographic investigations. Eight of these thin sections were polished and analyzed with the...