...Ben Hayes; Jérémie Lehmann; Grant M. Bybee; Trishya M. Owen-Smith Abstract Field, microstructural and mineral compositional evidence from the Mesoproterozoic K-feldspar megacrystic Red Granite at Oncócua Platform (southwestern Angola) is consistent with crystal transfer from magma to wallrock...

..., muscovite, biotite, and, in minor proportions, fluorapatite and oligoclase (Ab 85–87 ). Some sulfides, pyrite, chalcopyrite and galena occur in very low proportions. At the contact of the Presqueira pegmatite, the dominant metasomatic assemblage of the wallrock is also quartz, muscovite and biotite...

.... The granitoids range from quartz-alkali granitoids sensu stricto to diorite with various types of wallrock alterations including K-feldspar alteration, sericitization, silicification, and sulphidation/ferruginization. Most gold-bearing samples are extensively brecciated. Gold mineralization is accompanied...

... from the original limestones/dolostones and therefore susceptible to different reactions with magmas forming new reservoirs. This paper forms part of a continuing study of the magma-wallrock interaction processes at Somma-Vesuvius (Pascal et al ., 2006 , 2008 ) which is focusing on the construction...

... probably been derived from the wallrock minerals. The ratios of the cobalt, nickel, and manganese contents in pyrite to those in biotite can be considered to be a measure of the sulphophile characters of these elements. On this basis, cobalt is the most sulphophile, followed by nickel and manganese...