The following illustrations in this presentation show four photomicrographs of cathodoluminescent images, two black-and-white scanning electron microscope images, and six photomicrographs of thin sections in which various stages of replacement of prim . . .

Most geologists believe that plutonic bodies, including granites, have been emplaced as magma, even though the majority of granites contain mineral assemblages that are stable in the temperature range of 400-600º C − well below melting conditions for . . .

Examples of how silicate minerals in plutonic igneous rocks are modified by mobilized K and Si in the temperature range of about 350-550ºC have not been described elsewhere, whereas modifications above and below this range have been thoroughly documen . . .

In this presentation questions are raised about a melt-restite unmixing model proposed by Barton and Sidle (1994) for the myrmekite-bearing Waldoboro granite complex along the southeastern coast of Maine (USA). This complex consists mostly of granite/ . . .

The AOC Granite 7-32-89-10 hole, drilled to search for oil in the Precambrian basement below the Alberta bituminous (tar) sands near Fort McMurray, Canada, penetrates layered biotite-hypersthene quartz diorite-gabbro sills that occur between 543 and 2 . . .

In a belt through the central and western Mojave Desert of southern California are several muscovite- and garnet-bearing granites that are suggested to be derived by anatexis of the Pelona-Orocopia-Rand schists or similar rocks by Miller et al. (1996) . . .

The Ghooshchi granite has been intruded as an anorogenic, A-type, within-plate granite in an area northwest of Uromiyeh Lake in western Azerbaijan in northwestern Iran (Jahangiri, 1990). The Precambrian crystalline basement in this area is a metamorph . . .

Two different generally-accepted hypotheses for the origin of myrmekite are examined in seven different photomicrographs.

Detailed petrographic and chemical studies of rocks in the Grenville Lowlands along the northwestern flank of the Adirondack massif of New York (Fig. 1) show that thick biotite-oligoclase-quartz gneiss (the Popple Hill gneiss) has been subjected to in . . .

Whereas most geologists have long accepted a "magmatic" origin for large granite plutons, "batholiths" in which crystallization is imagined to have been attenuated over millions of years (Leake 1990), their magmatic view was technically challenged by . . .