The Neotethyan subduction and collision with the Asian, Indian, Australian plates is evidenced by a giant Andean-type arc system remarkable igneous belt along southwestern Eurasian margin. However, southward extent, cause, of poorly understood. Here, zircon U-Pb dating whole-rock geochemical study two groups Eocene (50−48 Ma) mafic intrusions from Tangse, North Sumatra, helps to unravel story. ...

The application of comparator instrumental neutron activation analysis (INAA) combined with the internal standard method was considered to analyze solid volumetric samples different rocks, 15–20 g mass, for Au content. Fe used as its mass fraction determined by X-ray fluorescence (XRF) help a laboratory energy dispersive XRF spectrometer RLP-21T, Kazakhstan. puck-like about 29 mm across diamete...

New geochronological data and published structural and stratigraphic data show that two distinctly different ophiolitic assemblages formed in general proximity to one another at nearly the same time and were subsequently imbricated along a regional thrust zone. The Josephine ophiolite constitutes a complete oceanic crust and upper mantle sequence which lies within the western Jurassic belt of t...

the noorabad-kermanshah ophiolite is part of eastern mediterranean-zagros-oman tethyan ophiolites, that this area is located in south-southwest of the main zagros thrust fault. this ophiolite consists of peridotites, serpentinites and pegmatite gabbros as mantle sequence whereas crustal sequences are composed of locally layered gabbros, isotropic gabbros, sheeted dike complex, basaltic to andes...

Abstract Large pyrite-dominated gold deposits are hosted in hydrothermally altered metamorphic rocks the Carolina slate belt of South and partly covered by Coastal Plain sedimentary rocks. In this study, we investigate utility geophysical data including aeromagnetic, electromagnetic (EM), land gravity surveys as exploration tools. Observed anomalies correlated with rock properties such resistiv...

Abstract. Surface wave (SW) methods offer promising options for an effective and sustainable development of seismic exploration, but they still remain under-exploited in hard rock sites. We present a successful application active passive surface tomography the characterization southern continuation Siilinjärvi phosphate deposit (Finland). A semi-automatic workflow extraction path-average disper...

The Central Balkan Zone belongs to the north-vergent fold-and-thrust belt of Alpine orogen. In this zone, pre-Permian low-grade rocks, metamorphosed during Variscan orogeny, were later reworked at two main stages compressional tectonics. Several tectono-stratigraphic subdivisions these metamorphic rocks previously presented, based on a purely stratigraphic approach in absence detailed structura...

In the extreme north of Brazil, in Roraima, there is an important set mafic, volcanic or plutonic rocks, associated with Juro-Cretaceous magmatism, and one most extensive areas Colônia do Taiano region, first agricultural colony Roraima. addition to basalts, many diabases diorites occur, forming patch soils good suitability, cerrado-forest transition. Two soil profiles developed from diabase we...