The respective tectonic effects of back arc spreading and continental collision in Asia are considered either as two independent processes or as closely interrelated. Extrusion tectonics assumes that the opening of the South China Sea and the left-lateral motion along the Red River fault are geometrically linked in a pull-apart manner. This model is not accepted by several workers because the s...

Abstract Early Paleozoic accretionary orogens dominated the Western Gondwana margin and were characterized by nearly continuous subduction associated with crustal extension back-arc basin development. The southwestern is represented Famatinian Pampean basement realms exposed in South America, both related to protracted evolution of Terra Australis Orogen, whereas northwestern mainly recorded Ca...

Space-borne multispectral and radar data were used to comprehensively map geological contacts, lithologies structural elements controlling gold-bearing quartz veins in the Wadi Hodein area Egypt. In this study, enhancement algorithms, band combinations, math (BM), Principal Component Analysis (PCA), decorrelation stretch mineralogical indices applied Landsat-8 OLI, ASTER ALOS PALSAR following a...

Abstract We have investigated the deformation history of Keszthely Hills (Transdanubian Range, W Hungary), which belongs to uppermost slice Austroalpine nappe system. This Upper Triassic Miocene sedimentary rock sequence documented upper crust during repeated rifting and inversion events. structural pattern stress field evolution this multistage by data collection evaluation from surface outcro...

Apatite helium thermochronometry provides new constraints on the tectonic history of a recently uplifted crystalline mass adjacent to the San Andreas fault. By documenting aspects of the low-temperature (40°1 00°C) thermal history of the tectonic blocks of the San Bernardino Mountains in southern California, we have placed new constraints on the magnitude and timing of uplift. Old helium ages (...

The gold mineralization located in the southern Eastern Desert of Egypt mostly occurs characteristic geologic and structural settings. gold-bearing quartz veins alteration zones are confined to ductile shear between highly deformed ophiolitic blocks, sheared metavolcanics, gabbro-diorite rocks. present study attempts integrate multisensor remotely sensed data, analysis, field investigation unra...

The origins of increased stream flow and spring discharge following earthquakes have been the subject of controversy, in large part because there are many models to explain observations and few measurements suitable for distinguishing between hypotheses. On October 30, 2007 a magnitude 5.5 earthquake occurred near the Alum Rock springs, California, USA. Within a day we documented a several-fold...

The Canadian Superior Province has become one of the key test pieces to discuss tectonic processes and mechanisms crustal growth in Late Archean. consists a >2.8 Ga proto-cratonic core intruded by voluminous arc-like plutons surrounded series narrow, elongate ca. 2.8–2.7 juvenile belts, also referred as terranes or domains. seem wrap around generally young outward, but kinematics geodynamic cau...

Abstract We present the results of a pilot study that integrates automated drill core scanning technology based on simultaneous X-ray computed tomography (XCT) and fluorescence (XRF) analyses to provide high-spatial-resolution (<0.2 mm) information 3-D rock textures structures, chemical composition, density. Testing its applicability for mineral exploration research was performed by anal...