The Late Devonian to Early Mississippian is an important metallogenic epoch within the Canadian cordillera resulting in the production of significant sediment exhalative massive sulphide (SEDEX) and volcanogenic massive sulphide (VMS) mineral occurrences within rocks of cratonic or pericratonic affinity. Major belts include the Late Devonian Earn-hosted SEDEX deposits of the Selwyn and Gataga d...

A new 3D geological model and structural evolution of the Rio Tinto world-class VMS deposit is presented in this work. The Rio Tinto volcanogenic massive sulfide (VMS) deposit is located in the Spanish segment of the Iberian Pyrite Belt and is hosted by felsic porphyritic volcanic rocks and tuffs. Computer generated 3D modeling of the different orebodies and host rocks has been carried out usin...

Ocean island volcanism is generally considered to be dominated by basaltic eruptions, yet felsic products associated with more hazardous explosive eruptive events are also present in the geological record of many these islands. Ascension Island, recently recognised as an active volcanic system, exhibits eruption deposits but their age, styles and stratigraphic association mafic thus far unclear...

The East Kunlun Orogenic Belt (EKOB), which is in the northern part of Greater Tibetan Plateau, contains voluminous Late Triassic intermediate-felsic volcanic rocks. In east end EKOB, we identified highly differentiated peralkaline-like Xiangride rhyolites (~209 Ma) that differ from widespread andesitic-rhyolitic Elashan volcanics (~232–225 terms their field occurrences and mineral assemblages....

The high-grade uranium deposits in the Xiemisitan area, northwestern China, are genetically associated with the faulting of felsic volcanic or sub-volcanic rocks. Ferric iron alteration indicates that oxidizing hydrothermal fluids percolated through the rocks. In this study, we measured the gamma-ray intensities of rocks in the Xiemisitan area and we propose a hybrid method for the mapping of f...

0883-2927/$ see front matter 2011 Elsevier Ltd. A doi:10.1016/j.apgeochem.2011.05.010 ⇑ Corresponding author. Tel.: +1 919 684 5847; fax E-mail address: [email protected] (D.S. Vinson). The Willcox Basin is a hydrologically closed basin in semi-arid southeastern Arizona (USA) and, like many other alluvial basins in the southwestern USA, is characterized by oxic, near-neutral to slightly basic groun...