Tectonophysics

Items from 1 to 12 out of 12 results

article

Three-armed rifts or masked radial pattern of eruptive fissures? The intriguing case of El Hierro volcano (Canary Islands)

L. Becerril, I. Galindo, J. Martí, A. Gudmundsson

Tectonophysics > 2015 > 647-648 > Complete > 33-47

Using new surface structural data as well as subsurface structural data obtained from seventeen water galleries, we provide a comprehensive model of the volcano-tectonic evolution of El Hierro (Canary Islands). We have identified, measured and analysed more than 1700 volcano-structural elements including vents, eruptive fissures, dykes and faults. The new data provide important information on the...

article

Seismic imaging of the geodynamic activity at the western Eger rift in central Europe

N. Mullick, S. Buske, P. Hrubcova, B. Ruzek, more

Tectonophysics > 2015 > 647-648 > Complete > 105-111

The western Eger rift at the Czech–German border in central Europe is an important geodynamically active area within the European Cenzoic rift system (ECRS) in the forelands of the Alps. Along with two other active areas of the ECRS, the French Massif Central and the east and west Eifel volcanic fields, it is characterized by numerous CO ₂ -rich fluid emission points and frequent micro-seismicity...

article

Evolving magma sources during continental lithospheric extension: Insights from the Liaonan metamorphic core complex, eastern North China craton

Mo Ji, Junlai Liu, Ling Hu, Liang Shen, more

Tectonophysics > 2015 > 647-648 > Complete > 48-62

The relation between magmatic activity and detachment faulting during continental lithospheric extension remains a persistent question. This paper takes the Liaonan metamorphic core complex (mcc) in the eastern North China craton as an example to explore how magma generation relates to detachment faulting in response to continental lithospheric extension due to the subduction of the Paleopacific plate...

article

Spatial variation of stress orientations in NE Japan revealed by dense seismic observations

Keisuke Yoshida, Akira Hasegawa, Tomomi Okada

Tectonophysics > 2015 > 647-648 > Complete > 63-72

In order to investigate the spatial distribution of the crustal stress state across NE Japan, we determined 1370 focal mechanisms by picking P-wave polarities from seismograms observed by temporary and permanent seismic networks densely deployed in this area. We applied stress tensor inversions to these data, plus to those routinely determined. The results show that the stress state in NE Japan is...

article

Three-dimensional fault meshes and multi-layer shear in mass-transport blocks: Implications for fluid flow on continental margins

Davide Gamboa, Tiago M. Alves

Tectonophysics > 2015 > 647-648 > Complete > 21-32

Submarine mass-transport deposits (MTDs) frequently include blocks of strata with variable deformation styles. In this paper, a 3D seismic volume from SE Brazil is compared with outcrop information from SE Crete to investigate multi-scale deformation patterns within mass-transport blocks. Block morphology in the two study areas relates to the orientation of internal faults and fractures, with wide...

article

Quality assessment of reservoirs by means of outcrop data and “discrete fracture network” models: The case history of Rosario de La Frontera (NW Argentina) geothermal system

R. Maffucci, S. Bigi, S. Corrado, A. Chiodi, more

Tectonophysics > 2015 > 647-648 > Complete > 112-131

We report the results of a systematic study carried out on the fracture systems exposed in the Sierra de La Candelaria anticline, in the central Andean retrowedge of northwestern Argentina. The aim was to elaborate a kinematic model of the anticline and to assess the dimensional and spatial properties of the fracture network characterizing the Cretaceous sandstone reservoir of the geothermal system...

article

Editorial Board

Tectonophysics > 2015 > 647-648 > Complete > ii

article

Panafrican basement and Mesozoic gabbro in the Zagros orogenic belt in the Dorud–Azna region (NW Iran): Laser-ablation ICP–MS zircon ages and geochemistry

Farzaneh Shakerardakani, Franz Neubauer, Fariborz Masoudi, Behzad Mehrabi, more

Tectonophysics > 2015 > 647-648 > Complete > 146-171

The Dorud-Azna region of the Sanandaj-Sirjan metamorphic zone (SSMZ) in NW Iran is part of the Zagros orogenic belt and exposes an amphibolite-grade metamorphic succession of mixed continental (e.g., the granitic Galeh-Doz orthogneiss) and oceanic or rift (e.g., various amphibolites) origin, which is intruded by the Darijune gabbro. Laser-ablation ICP-MS U-Pb zircon ages of 608+/-18Ma and 588+/-41Ma...

article

Tomographic imaging of the Cascadia subduction zone: Constraints on the Juan de Fuca slab

Chuanxu Chen, Dapeng Zhao, Shiguo Wu

Tectonophysics > 2015 > 647-648 > Complete > 73-88

We used 40,343 P-wave arrival times from 1883 local earthquakes and 105,455 P-wave arrivals from 6361 teleseismic events to study the detailed structure of the Cascadia subduction zone. We conducted tomographic inversions using a starting velocity model which includes the high-velocity subducting Juan de Fuca slab as a priori information. A number of such slab-constrained inversions are conducted...

article

Crystallographic preferred orientations of exhumed subduction channel rocks from the Eclogite Zone of the Tauern Window (Eastern Alps, Austria), and implications on rock elastic anisotropies at great depths

Ruth Keppler, Klaus Ullemeyer, Jan H. Behrmann, Michael Stipp, more

Tectonophysics > 2015 > 647-648 > Complete > 89-104

Crystallographic preferred orientations (CPO) of rocks from an exhumed subduction channel of the Alpine orogen were determined using time-of-flight neutron diffraction. This method allows the investigation of large polymineralic samples and, more importantly, the application of full pattern fit methods to constrain CPOs of mineralogically complex rocks. Samples studied include intensely deformed fresh...

article

Architecture, fracture system, mechanical properties and permeability structure of a fault zone in Lower Triassic sandstone, Upper Rhine Graben

Johanna F. Bauer, Silke Meier, Sonja L. Philipp

Tectonophysics > 2015 > 647-648 > Complete > 132-145

Close to the western Upper Rhine Graben Main Fault, Alsace, a NNE–SSW-striking fault zone, crosscutting porous, thick bedded Lower Triassic Bunter sandstone was investigated in detail, including its architecture, discontinuity system, mechanical rock properties and implications on its permeability structure and fault zone type. Field observations indicate a three-part fault zone structure including...

article

Carbonate clumped isotope thermometry in continental tectonics

Katharine W. Huntington, Alex R. Lechler

Tectonophysics > 2015 > 647-648 > Complete > 1-20

Reconstructing the thermal history of minerals and fluids in continental environments is a cornerstone of tectonics research. Paleotemperature constraints from carbonate clumped isotope thermometry have provided important tests of geodynamic, structural, topographic and basin evolution models. The thermometer is based on the ¹³ C– ¹⁸ O bond ordering in carbonates (mass-47 anomaly,...

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Volume:
647-648
Year:
2015

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Keywords

CANARY ISLANDS (1)
CARBONATE (1)
CASCADIA (1)
CLUMPED ISOTOPE THERMOMETRY (1)
CONTINENTAL LITHOSPHERIC EXTENSION (1)
COUPLED CRUST–MANTLE DETACHMENT (1)
CRUSTAL FLUIDS (1)
CRYSTALLOGRAPHIC PREFERRED ORIENTATION (1)
DFN MODELING (1)
DIGENESIS (1)
DYKE (1)
EARTHQUAKE (1)
ECLOGITE ZONE (1)
EGER RIFT (1)
EL HIERRO (1)
ELASTIC PROPERTIES (1)
EPISODIC TREMOR AND SLIP (1)
ERUPTIVE FISSURE (1)
EUROPEAN CENOZOIC RIFT SYSTEM (1)
EVOLVING MAGMA SOURCES (1)
FAULT ZONE (1)
FAULTS AND FRACTURES (1)
FLUID FLOW (1)
FOCAL MECHANISM (1)
FRACTURE SYSTEM PARAMETERS (1)
GABBRO (1)
GEOTHERMAL SYSTEM (1)
GRANITE (1)
JUAN DE FUCA SLAB (1)
LIAONAN METAMORPHIC CORE COMPLEX, NORTH CHINA CRATON (1)
MASS-TRANSPORT BLOCKS (1)
MECHANICAL ROCK PROPERTIES (1)
MIDDLE BUNTER (1)
NE JAPAN (1)
NW ARGENTINA (1)
P-WAVE ANISOTROPY (1)
PALEOELEVATION (1)
PANAFRICAN BASEMENT (1)
PARALLEL EXTENSION TECTONICS (1)
PERMEABILITY MESH (1)
PERMEABILITY STRUCTURE (1)
RADIAL DISTRIBUTION (1)
RESERVOIR (1)
RETROGRESSION OF ECLOGITES (1)
ROSARIO DE LA FRONTERA (1)
SEISMIC TOMOGRAPHY (1)
SHEAR DEFORMATION (1)
SLOPE FAILURE (1)
STRESS FIELD (1)
STRESS MAGNITUDE (1)
STRESS TENSOR INVERSION (1)
SUBDUCTION CHANNEL (1)
SUBDUCTION ZONE (1)
SWARM EARTHQUAKE (1)
TECTONIC MÉLANGE (1)
TECTONICS (1)
THERMAL HISTORY (1)
TOPOGRAPHY (1)
UPPER RHINE GRABEN (1)
U–PB ZIRCON (1)
VOLCANO-STRUCTURE (1)
WEST BOHEMIAN MASSIF (1)
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