Sar-Kuh porphyry copper deposit is located 6 km southwest of the Sar-Cheshmeh copper mine, Kerman Province, Iran. Based on field geology, petrography and fluid inclusions studies, four alteration types have been identified in the Sar-Kuh area. Early hydrothermal alteration formed a potassic zone in the central parts of Mamzar granite/grano-diorite stock and propylitic alteration in its peripher...

This research was performed with the objective of evaluating the accuracy of spectral angle mapper (SAM) classification using different reference spectra. The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) digital images were applied in the SAM classification in order to map the distribution of hydrothermally altered rocks in the Kerman Cenozoic magmatic arc (KCMA), Iran...

Indonesia is a country that has several world-class copper-gold deposits, particularly in eastern Sunda arc. The Hu’u complex prospects the surface as lithocap of extensive epithermal style alteration, but some were detected associated with porphyry beneath surface. study focuses on hydrothermal breccia cement factor influencing system district. methods used mineralogical analysis petrography a...

-A complete conversion series for mica/smectites was found in a hydrothermal alteration envelope around Kuroko-type ore deposits at the Shinzan area, Akita Prefecture, Northeast Japan. The minerals are an alteration product of volcanic glass of Miocene age and are commonly associated with zeolites and silica minerals. Degrees of ordering of interstratification of the minerals change discontinuo...

The Great Basin of the Western United States has thin continental crust and geologic structures that have controlled the emplacement of significant precious and base metal mineralization. Many of the mineral deposits in the Great Basin were emplaced by hydrothermal processes that altered the mineralogy of their host rock assemblages and facilitated concentration of metals. In the 1960’s and 197...

tourmalinization characterizes the most pervasive alteration type in the nezam abad ore deposit, west-central iran. it delineates high-temperature centers of mineralization and together with quartz and cassiterite form inner parts of the alteration halo. the composition of tourmalines plots mostly along and between the proton and alkali-deficient end members. tourmaline in quartzdioritic host i...

Bolaang Mongondow is located on the Eastern North arm of Sulawesi. This area a Neogene-aged magmatic arc composed plutonic and volcanic rocks that indicate mineralization-bearing host rocks. The study aimed to determine geological setting alteration based observations geochemical analysis. method used mapping, followed by laboratory studio data lithology this andesite, diorite, pyroclastic brec...

[1] Recent spectroscopic detections of CH4 in the atmosphere of Mars are the first definitive observations of an organic compound on that planet. The relatively short photochemical lifetime of CH4 ( 300 years) argues for a geologically young source. We demonstrate here that lowtemperature alteration of basaltic crust by carbon-bearing hydrothermal fluid can produce the required CH4 flux of 1 10...