exact petrography and mineral chemistry investigations of pristine and altered rocks of the post-eocene panj-kuh pluton show thatsubsequent to emplacement and crystallization, rocks were subjected to two secondary composition equivalents, sodic-calcic andpotassic alterations, respectively. fresh rocks have syenitic composition and contain plagioclase (labradorite), k-feldspar, magmaticdiopside,...

Whiteware compositions prepared using Pugu kaolin and industrial grade quartz and feldspar were studied with respect to varying sintering temperatures. The strength developed was correlated to mullite (3Al2O3.2SiO2) content and the microstructure. It was observed that within the vitrification temperature range, the strength mainly depended on the mullite content and the bulk density. Above the ...

The great depth and relatively steep geothermal gradient (3⁄429oC=km) of the KTB deep crustal borehole, located in the Bavarian region of Germany, provides the basis for our study of diffusive argon loss in K-feldspar. The observed borehole temperature at 9 km is 3⁄4265oC which reaches well into the argon closure interval for K-feldspar (3⁄4125–350oC). Four microcline and two adularia samples d...

The diagenetic history of Triassic sandstone from the Beacon Supergroup, Victoria Land, Antarctica, can be divided into three main phases of shallow burial diagenesis, contact diagenesis (temperatures of 200-300oC), and post-contact diagenesis, on the basis of petrographic and geochemical analyses. Shallow burial diagenesis is characterised by minor compaction, K-feldspar alteration to illite, ...

Programmers are often forced to implement performance-critical applications at a low abstraction level. This leads to programs that are hard to develop and maintain because the program text is mixed with low level optimization tricks and is far from the algorithm it implements. Even if compilers are smart nowadays and provide the user with many automatically applied optimizations, practice show...

The Papuk Mt. belongs to the Slavonian Mountains in Croatia. It is situated in the southernmost part of the Tisza Megaunit (Fig. 1). Comprehensive reviews of the geological setting of this area are given by JAMIČIĆ & BRKIĆ (1987), JAMIČIĆ (1989) and KOROLIJA & JAMIČIĆ (1989). VRAGOVIĆ (1965) gave a detailed petrographic description of the gneisses, granitoids and the pegmatites of this region. ...

Introduction: Remote-Raman [e.g.,1-5] and micro-Raman spectroscopy [e.g., 6-10] are being evaluated on geological samples for their potential applications on Mars rover or lander. The Raman lines of minerals are sharp and distinct. The Raman fingerprints of minerals do not shift appreciably but remain distinct even in sub-micron grains and, therefore, can be used for mineral identification in f...

Abstract The Twakputs Gneiss is a garnetiferous, K-feldspar megacrystic, biotite granite-granodiorite orthogneiss. It represents major unit in the Kakamas Domain of Mesoproterozoic Namaqua-Natal Metamorphic Province extending about 250 km between Riemvasmaak South Africa and Grünau southern Namibia. occurs as foliation-parallel, sheet-like bodies tightly infolded together with granulite-facies ...

Tuberose is one of the most important aromatic cut flower among ornamental plants that its growth and quality is influenced by the type and percentage of mineral compounds in the substrate. This study was carried out on the basis of a randomized complete design to explore the impact of feldspar, talc, dolomite and tuff minerals at the rate of 10, 20 and 40% incorporated with garden soil and man...

Tobias Zolles, Julia Burkart, Thomas Häusler, Bernhard Pummer, Regina Hitzenberger and Hinrich Grothe* Vienna University of Technology, Institute of Materials Chemistry, Getreidemarkt 9, 1060 Vienna, Austria University of Vienna, Faculty of Physics, Aerosol Physics and Environmental Physics, Boltzmanng. 5, 1090 Vienna, Austria University of Toronto, Chemistry Department, St. George St. 80, ON M...