Diffusion of argon in feldspar is important because of its significance to K-Ar geochronology
and becomes especially so with increasingly widespread use of both plagioclase and alkali …

Etching of alkali feldspar cleavage fragments with hydrofluoric acid vapor, followed by study
of the surfaces by scanning electron microscopy (SEM), is a simple and rapid technique for …

Retrograde exchange of oxygen isotopes between minerals in igneous and metamorphic
rocks by means of diffusion is explored using a finite difference computer model, which …

Surface area measurements and dissolution experiments were performed on subsamples
from a naturally weathered mineral assemblage (100–1000 μm) consisting of feldspar and …

Highly turbid alkali feldspars from the Loch Ainort granite (59 Ma), Isle of Skye, have been
analysed using the 40 Ar-39 Ar method to obtain chronological and chemical (K, Cl, Br, I) …

Abstract The Upper Paleozoic granites of the Emu Suite, north Queensland, show varying
degrees of alteration. The petrographic and microstructural survey of albite-rich zones …

Attention will be focussed on the following topics and relevant problems concerning the
characterization of alkali feldspars. Light optics: textural observations and determination of …

This study deals with the relationships between crystal structure, grain diameter, surface
morphology and dissolution kinetics for feldspar and quartz under acid conditions …

The importance of trace quantities of hydrogen in feldspars in determining the rates of intra-
crystalline transport processes was suggested by several early experimental studies of Al-Si …

The nature of the presence of K-feldspar megacrysts in granitoids and enclaves has been
the source of much debate. Recent opinions hold that the presence of K-feldspar megacrysts …