introduction several valuable calcite deposits are located in ghare-gheshlagh, south basin of urmia lake, nw iran. ghare-gheshlagh area is situated in the northern part of tectono-sedimentary unit, forming nw part of tertiary sanandaj-sirjan geological belt (stocklin and nabavi, 1972). the predominant rock types of the area include light color limestones (qom formation) and quaternary alluviums...

The Jhabua phosphorite is the second largest deposit in India after famous Jhamerkotra of Rajasthan. Though geographically they are separated by state boundaries but geologically belong to same domain. hosted with Proterozoic meta-sediments Aravalli Supergroup. host litho-units for stromatolite bearing phosphate mineralization limestone and chert. siliceous nature has large variation terms impu...

Concentrations of the incompatible trace elements and REEs in the upper mantle rocks of the Northern Semail ophiolite are very low, as typical in the residua of partial melting and in the early products of a fractionating magma. However, their geochemical characteristics have shown indications of hydrous magmas that more likely related to a subduction environment. Melt extraction can play a cru...

Local structural property of an image is often considered in image enhancement with various high/low pass filters. Spatial association indexes (autocorrelation, covariance, and variogram) have been commonly used to characterize the local structure of surfaces for data interpolation in kriging. Singularity is another index measuring the scaling invariant property of measures from a multifractal ...

Rivers are dynamic and sensitive systems that change their chemical composition from source to mouth. This is due the influence of a set variables controlled by hydro-litho-eco-atmospheric processes anthropic pressures which are, in turn, affected catchment attributes. work proposes new way thinking about river geochemistry focused on environmental interconnections rather than single variables....

The dynamics of mantle flow and melting of a ridge-centered plume were investigated with three-dimensional variable-viscosity numerical models, focusing on three buoyancy sources: temperature, melt depletion, and melt retention. The width, W, to which a plume spreads along a ridge axis, depends on plume volume flux, Q, full spreading rate, U, buoyancy number, B, and ambientrplume viscosity cont...

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Petrology and geochemical characteristics of granitic rocks from South Sulawesi, especially from Polewaliand Masamba area are presented in order to elucidate their origin of magma and geodynamic setting. The granitic rocks in these areas are dominated by granodiorite and granite in composition. Quartz, K-feldspar and plagioclase occur as major phases with hornblende and biotite as major ferroma...

Mississippi Valley Type (MVT) 1 deposits represent the majority of carbonate-hosted Zn–Pb globally. They typically form in an extensional tectonic setting along passive margins. However, studies on Sichuan–Yunnan–Guizhou Triangle area (SYGT) reveal differences terms essential features typical MVT deposits. We discuss main these deposits, controlled by folds and faults, high-grade ores symbiotic...

Petrology and geochemical characteristics of granitic rocks from South Sulawesi, especially from Polewaliand Masamba area are presented in order to elucidate their origin of magma and geodynamic setting. The granitic rocks in these areas are dominated by granodiorite and granite in composition. Quartz, K-feldspar and plagioclase occur as major phases with hornblende and biotite as major ferroma...