Results 321 to 330 of about 26,623 (334)

How late are K-feldspar megacrysts in granites?

Lithos, 2008
Abstract Various petrologists have suggested that K-feldspar megacrysts grow in granites that are extensively crystallized, even at subsolidus conditions. However, experimental evidence indicates that, though K-feldspar nucleates relatively late in the crystallization history, abundant liquid is available for development of large crystals.
R.H. Vernon, S.R. Paterson
openaire   +1 more source

Diffusion of Ar in K-feldspar: Present and absent

Geological Society, London, Special Publications, 2013
Abstract The mechanisms of Ar release from K-feldspar samples in laboratory experiments and during their geological history are assessed here. Modern petrology clearly established that the chemical and isotopic record of minerals is normally dominated by aqueous recrystallization.
openaire   +2 more sources

Stability of the assemblage cordierite +K feldspar+quartz

Contributions to Mineralogy and Petrology, 1976
Under hydrous conditions the stability field of the assemblage Mg-cordierite+K feldspar+quartz is limited on its low-temperature side by the breakdown of cordierite+K feldspar into muscovite, phlogopite and quartz, whereas the high-temperature limit is given by eutectic melting.
openaire   +1 more source

Isochron measurements of naturally irradiated K-feldspar grains

Radiation Measurements, 2007
Abstract The equivalent doses of K-feldspar grains in a range of grain sizes from 90 to 250 μ m diameter were measured using a single-aliquot regenerative-dose protocol for the infrared stimulated luminescence (IRSL) signals for two samples of desert sand. The equivalent doses for each sample were compared with that for the 125 – 150
Li, B, Zhao, H, Li, SH, Wintle, AG
openaire   +3 more sources

K-Feldspar-Rich Aplite Dykes in the Yolcular Metamorphics (Bitlis Massif): A Potential Source for K-Feldspar

2015
  Bitlis Masifi'ndeki Yolcular Metamorfitleri içinde gözlenen aplit daykları feldispat minerallerince zenginleşme göstermektedirler. Bu çalışmada Bitlis Masifi'nin alt birliğini kesen aplit dayklarının K-feldispat kaynağı olarak kullanılabilirliği araştırılmıştır.
Oyan, Vural, Özdemir, Yavuz
openaire   +1 more source

K-FELDSPAR AND COOTIES; OR WHY K-FELDSPAR LIKES TO GROW INTO BIG CRYSTALS

Geological Society of America Abstracts with Programs, 2019
openaire   +1 more source

K ‐ Feldspar in Dune Sand

Soil Survey Horizons, 1962
openaire   +1 more source

Multispectral athermal fading rate measurements of K-feldspar

Radiation Measurements, 2022
Monika Devi, Naveen Chauhan, Haresh Rajapara, Sachin Joshi, A.K. Singhvi   +4 more
openaire   +1 more source

K-feldspar

2009
openaire   +1 more source

Coccolith in a K-feldspar: A note.

Journal of Nannoplankton Research, 2000
K. Salis, D. Bernoulli
openaire   +1 more source