Using the techniques of X-ray diffraction, polarizing microscopy, uniaxial compression, and scanning electron microscopy (SEM), relationships between microfracture features mineral morphology granite were studied. The results showed that feldspar, quartz, biotite are main components samples in this study. Biotite has a self-shaped flake structure with perfect cleavage. K-feldspar lattice double...

We study two reservation deposit policies for a service rm to increase its revenue through higher capacity utilization. First, under the no deposit policy, the rm requires no reservation deposit and imposes no no show penalty. Anticipating potential no shows, a rm may overbook; hence, there is no guarantee that the reserved service will be provided under the no deposit policy. On the contrary, ...

Hydrothermal quartz samples collected from the Fujiashan and Yipanqiu deposits in southeastern Hubei Province, China have been investigated by analytical combination of optical microscopy, scanning electron inductively coupled plasma emission spectroscopy, conjunction with conventional beneficiation processing to evaluate their potential as sources high purity (HPQ) a commercial perspective. Mi...

Ensifer adhaerens M78, a bacterium isolated from soil, can weather potash feldspar and release Fe, Si, and Al from rock under nutrient-poor conditions. Here, we report the draft genome sequence of strain M78, which may facilitate a better understanding of the molecular mechanism involved in mineral weathering by the bacterium.

Fine scale heterogeneities in strontium isotope ratios, 40Ar-39Ar ages, and chemical com~sition have been determined for individual mineral grains and enclaves in the rhyolites of San Vincenzo, Italy. The rhyolites are peraluminous with phenocrysts of alkali feldspar, piagioclase, biotite, and cordierite and have previously been divided into two groups on the basis of whole rock major element c...

Introduction: Individual grains and small lithic clasts in thin-sectioned suevitic breccia samples from the International Continental Scientific Drilling Program (ICDP) Bosumtwi impact crater drillcore LB07A were examined petrographically to evaluate the occurrence , abundance, and characteristics of unshocked and shock-metamorphosed quartz. The analyzed samples were taken across a ~42-m-long (...

We report on the characterization of a thick sequence pyroclastic deposits exposed summit area and flanks Mount Melbourne volcano, in northern Victoria Land, Antarctica related to eruptions during Late Glacial period. provide complete tephra including mineralogy, single shard major- trace-element glass compositions, an 40Ar-39Ar age feldspar crystals extracted from deposit. The are trachybasalt...

A provenance study was conducted on the Mid-Proterozoic Newland Formation, in which petrographical features of sandstones and geochemical characteristics of shales were integrated to arrive at an internally consistent interpretation. Sandstones of the Newland Formation are typically arkosic sands and arkoses with very well rounded quartz and feldspar grains and only minor amounts of extrabasina...