The Metamorphic Origin of Granite

Two types of tourmaline with igneous and metamorphic origin in metamorphic rocks of north Golpayegan, Isfahan province

The Muteh-Golpayegan metamorphic complex consist of different metamorphic rocks including pelitic, semi-pelitic, carbonate, quartz-feldspathic and basic metamorphosed rocks. The metapelitic rocks include chlorite schist, biotite schist, garnet schist, staurolite schist, kyanite schist, sillimanite schist and andalusite schist. The semi-pelitic rocks contain higher amounts of quartz and lower am...

Origin of the Kootenay Lake Metamorphic High, Southeastern British Columbia

A nar row, elon gate re gion of an oma lously high meta mor phic grade runs par al lel to Kootenay Lake, in the cen tral part of the Kootenay Arc, south east ern Brit ish Co lum bia. Meta mor phic grade ranges from the chlorite/bi o tite zones on the flanks to the sillimanite+K-feld spar zone in the cen tre of the high. In this pa per, we pres ent a sum mary of struc tural, meta mor phic and ge...

Issn 1526-5757 1. Origin of Myrmekite and Metasomatic Granite

origin of garnet zoning in the contact metamorphic areole of hassan-abaad intrusion, southwest of taft

in the contact metamorphic aureole of the next to the granodiorite intrusive body in the hassan-abaad village of yazd, high frequency garnet in different metamorphic zones is notable, which some contain garnet crystal with obvious zoning. obtained data from core to rim of garnet by sem point analysis, show that garnet crystals belong to grandite series, and sharp variation of al and fe from cen...

the occurrence and origin of atoll garnet in hornblende schists from the contact aureole of the mashhad granite, ne iran

the formation of atoll garnet in hornblende schists from the contact aureole of mashhad granite,ne iran, is discussed using textural and chemical data. these data suggest the possibility of incipientreplacement of pre-existing idioblastic garnet from the core. in addition, the presence of chlorite and calcite inthe core of atoll garnet reveal the retrograde nature of atoll formation.