Buchitic glassy rocks appear within the skarn of contact metamorphic aureole of Feshark intrusive complex situated 30 km northeast of Isfahan. Intrusive complex is a multistage intrusion . Noritic gabbro is the first inttrusion which is invaded later on by a granitic melt. Granitic melt has metasomatically altered the gabbro and as a consequence a suite of hybrid rocks like monzogabbro, m...

Meteoric waters move along pathways in the subsurface that differ as a function of lithology because effects chemical and physical weathering. To explore how this affects stream chemistry, we investigated watersheds around an igneous intrusion Luquillo Mountains (Puerto Rico). We analyzed streams on 1) unmetamorphosed country rock (volcaniclastic sedimentary strata, VC) surrounding intrusion, 2...

Introduction: Chemical interactions between Venus’ atmosphere and surface rocks may be crucial to understanding the atmosphere’s composition [1-3], and to interpreting surface geology and physical properties [2,4,5]. Most studies have emphasized the atmosphere – its composition and ‘chemical sediments,’ and few have focused on what happens to basalts and their minerals in reaction with the atmo...

introduction the area studied is located north of azna (lorestan province) in a small portion of the sanandaj – sirjan structural zone (mohajjel et al., 2003).this area is part of the zagros orogenic belt, formed by the opening and closure of neotethyan ocean. from ne to sw, it consists of three parallel tectonic regions: the orumieh-dokhtar magmatic belt, the sanandaj-sirjan structural zone an...