2014年11月1日 · Late Grenvillian porphyritic granitoids in the Eastern Chhotanagpur Gneissic Complex are shown to be shoshonitic-type. Physical conditions of crystallization of porphyritic …

gneiss and hornblende-gneiss southwest of Lake Wakawan have the same mineralogical composition at the contact as they have a quarter of a mile away from it along the strike. On …

STUDIES ON THE SO-CALLED PORPHYRITIC GNEISS OF NEW HAMPSHIRE. CONTENTS. Introduction. Historical summary of opinion on the " porphyritic gneiss." Geographical …

A great mass of coarse, porphyritic granitoid gneiss occupies the towns of Sutton, Northbridge, and Douglas, in Massachusetts, and extends southward across western Rhode Island to …

belt (King, 1955). The porphyritic granite plutons crop out in the Charlotte belt. In central North Carolina, the Charlotte belt is a complex of gneiss, schist, gabbro, syenite, diorites, diabase …

In the vicinity of basic intrusive, the porphyritic granite gneiss shows enrichment of MgO, whereas its evolved part, psammitic gneiss shows more boron enrichment with the presence of …

(C) Porphyritic granite gneiss (Augen Gneiss) shows clear sinistral shear sense in megacrystic alkali feldspar grains where distinct rind and tail of recrystallized grains of same mineral in the …

Alkali feldspar megacrysts and biotite in the locally neoformed porphyritic granite gneiss were related to K-metasomatism and transformation of hornblende into biotite. In this work, it has …

2008年1月1日 · The North Purulia Shear Zone (NPSZ) is characterized by the occurrences of igneous intrusions extremely rich in alkalis, particularly potassium which include porphyritic …

The Bhilangana granitoid represents a batholithic size plutonic body that comprises granite gneiss, porphyritic granite gneiss, tourmaline-bearing mylonitic psammitic gneiss, associated …