Research projects

Topic1Tectonic setting of granitoid plutons in arcs and collisional orogens

Using a combination of structural analysis and geochronology, whole-rock and isotopic geochemistry, and gravimetry, we examine plutons as temporal and strain markers of regional deformation. Our present work concentrates on general issues of fabric development in plutons in response to regional strain, interactions of magma mingling, flow, and emplacement with regional tectonics, and spatial and temporal changes in plutonism during evolution of orogenic belts.

Magma flow and strain patterns in volcano–plutonic systems

Volcano–plutonic connection and mechanical processes in and above shallow-level magma chambers still remain poorly understood. Our research has recently concentrated on magma flow patterns in subcaldera plutons, mechanisms of growth and strain patterns in andesite domes, magma flow in both ring and radial dikes associated with collapse calderas, and internal fabric and emplacement of ignimbrite sheets.

Topic3Dynamics of Precambrian accretionary wedges

One of the main goals of our research is to better understand how Precambrian accretionary wedges formed and evolved along convergent plate margins. Based on structural analysis, anisotropy of magnetic susceptibility, geochemistry, and geochronology, we examine mechanisms of sediment accretion, internal strains, formation of ophiolitic mélanges, and late-stage extension in ancient accretionary wedges and compare those processes with modern settings.

Tectonics of sedimentary basins in collisional orogens

Development of orogenic sedimentary basins reflects a complex interaction among brittle faulting, tectonically-controlled uplift, erosion, and deposition. Our ongoing research is targeted on mechanisms of basin inversion in response to shortening of orogenic upper crust, initiation and tectonics of intracontinental basins during orogenic collapse, and relations between paleotopography, exhumation, and basin development.

Topic4Application of rock-magnetic methods in solving tectonic problems

In a close collaboration with Agico, Inc., we employ anisotropy of magnetic susceptibility and other rock-magnetic methods to analyze a wide range of geologic processes, including granitic magma emplacement and deformation, magma flow in dikes, growth of volcanic domes, formation and exhumation of metamorphic core complexes, and basin development during regional extension.

Topic5Application of continuum mechanics in understanding magmatic processes

Our joint research with the group of Prof. Petr Kabele, Department of Mechanics, Czech Technical University in Prague, utilizes high-end computational facilities to integrate numerical models with geologic data and observations. Our ongoing research targets include modeling of mineral fabric development in magmatic rocks in 3D, cooling of magma bodies, granitoid diapirism, and formation of collapse calderas.

Field areas of CTG

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Wallowa batholith, Oregon: 45.248788, -117.443161
Roof of the Wallowa Batholith, Oregon: 45.291796, -117.357330
Late Jurassic plutons, Blue Mountains, Oregon: 44.688183, -118.596039
Central Bohemian Plutonic Complex, Bohemian Massif: 49.631928, 14.046003
Teplá-Barrandian unit, Neoproterozoic to Lower Paleozoic, Bohemian Massif: 50.106123, 13.739662
Altenberg-Teplice volcano-plutonic complex, Bohemian Massif: 50.764259, 13.713684
České Středohoří Mountains, Bohemian Massif: 50.604078, 14.196976
Krkonoše-Jizera Plutonic Complex, Bohemian Massif: 50.796821, 15.146027
Moldanubian Batholith, Bohemian Massif: 49.144482, 15.006139
Štiavnica Volcano-Plutonic Complex, Western Carpathians: 48.457441, 18.890991
Red Mountain Creek Pluton, Sierra Nevada, California: 36.999380, -118.414823
Jurassic felsic dykes, Pitt Point and Mount Reece, Antarctica: -63.990418, -58.656006
Tuolumne Batholith, Sierra Nevada, California: 37.871559, -119.374149
Minarets Caldera, Sierra Nevada, California: 37.659906, -119.175568

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