TheEmeishan large igneous province contains a diverse assemblage of igneous rocks includingmildly peralkaline granitic rocks ofA-type affinity. The granitic rocks from the Panzhihua, Baima andTaihe plutons are temporally, spatially and chemically associatedwith layeredmafic-ultramafic intrusions. Electronmicroprobe analyses of themajor and accessoryminerals along with major and trace element da...

Introduction: Grains of composition with Fe, Ni and Cl are reported as relicts of awaruite (in mafic minerals of olivine and serpentine from the interior of the Earth) [1] or meteoritic mixture found originally at the fusion crust melted in atmosphere [2, 3, 4]. Recently author (YM) discusses that carbon contents of these phases are significant to discuss the sources of Fe, Ni and Cl [2, 3, 4, ...

Analyses of ephemeral granitic drainages of <5 km at South Mountain metamorphic core complex, central Arizona, reveal a previously undocumented process of bedrock strath formation in this setting. Granitic channel banks experience a higher degree of mineral decay than that of granitic channel floors. Electron microscope observations show that grussification along the granitic channel banks occu...

1 Lithologic differences 2 variable silicate weathering fluxes, which provide an important negative feedback on climate over 3 geologic timescales. To isolate the influence of lithology on weathering rates and mechanisms, we 4 compare two nearby catchments in the Luquillo Critical Zone Observatory in Puerto Rico, which 5 have similar climate history, relief and vegetation, but differ in bedrock...

The physical behavior of silicate melts during the final stages of intrusion in the earth's crust are poorly understood. In particular, the low temperature limit of igneous petrogenesis is poorly constrained. The extreme differentiates of granitic magmatism that lead to pegmatite genesis span a very large range of composition not normally considered to be within the domain of igneous melt compo...

Alluvial placer gold deposits that accumulate in streams across the globe are essentially allochthonous sedimentary transported from their source to location of deposition. The purpose this study was find alluvial sediments along Indus River NW Himalaya Pakistan. investigated region divided into five clusters based on river morphology. research focused mineralogical distribution, sediment sourc...

Two-dimensional measurement of radiation produced by natural irradiation of granitic rocks was performed by the use of an imaging plate, which is a storage film coated with photostimulated phosphor (BaFBr:Eu2+). Radiation images of small volume specimens, such as thin sections were obtained with the imaging plate. Irradiation images of granitic rocks are inhomogeneous and the intensity of photo...