نتایج جستجو برای: gabbro
تعداد نتایج: 566 فیلتر نتایج به سال:
The lamprophyric body of the Houway area at northeast of Hourand and northwest of Iran, is injected in the form of a laccolite within the core of a plunging anticline with WNW-ESE axial trend, which is composed of the Upper Cretaceous-Paleocene flysch deposits, and is cut by an alkaline gabbroic stock. The lithology composition of the lamprophyric body indicates camptonite to sanaite. Based on ...
105 Abstract: Origin of A-type alkali feldspar granites is currently the subject of a world-wide debate. Contrasting hypotheses have been proposed, which range from an entirely crustal origin to an almost complete mantle derivation. A-type alkali feldspar granites belong to either unimodal granite (rhyolite)-dominated association, or bimodal gabbro (basalt)-granite (rhyolite) suite. It is argue...
In the mafic-ultramafic suite of Tazehkand, Kalaybar-NW Iran, of Early-Cenozoic age, pyroxenitic core is surrounded by gabbro and total complex is surrounded by Paleocene volcano clastic of Majid Abad Formation. The pyroxenite is composed chiefly of Cpx+Ol+Ore. The associated gabbro minerals consist of Pl + Cpx + Am + Phl. The pyroxene composition in the two rock types is diopside-rich and rang...
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