ORGIN OF LARGE TRAPEZOHETRA OF ANALCIME AND PUMPELLYITE AGHIDA AREA, CENTRAL IRAN
عنوان مقاله: ORGIN OF LARGE TRAPEZOHETRA OF ANALCIME AND PUMPELLYITE AGHIDA AREA, CENTRAL IRAN
شناسه ملی مقاله: SGSI01_074
منتشر شده در اولین همایش انجمن زمین شناسی ایران در سال 1376
شناسه ملی مقاله: SGSI01_074
منتشر شده در اولین همایش انجمن زمین شناسی ایران در سال 1376
مشخصات نویسندگان مقاله:
MORADIAN - Department of Geogogy, University of Shahid Bahonar Kerman
خلاصه مقاله:
MORADIAN - Department of Geogogy, University of Shahid Bahonar Kerman
Large (Up to 3 cm in diameter), euhedral , cubic trapezohedra composed of single crystals analcime or aggregates of pumpellyite occur in three stratigphically adjacent tephriphonolite laves from the Aghda region. Large pumpellyite crystals are restricted to the lower flow and anallcime is restricted to the middle and upper flows. The trapezohedra contain concentrically arranged inclusions of plagioclase , pyroxene, titanomagnetite and apaite. In contrast to the albitised plagioclase inclusions in the pumpellyite trapezohedra, feldspar inculusions in anlcime are fresh with very minor normal zoning and range between An 56.0 and An 69.3 in composition.
صفحه اختصاصی مقاله و دریافت فایل کامل: https://civilica.com/doc/13842/