Alteration mineral assemblages in abyssal peridotites offer insights into the temperature and pressure conditions during hydrothermal fluid circulation oceanic lithosphere. Abundant venting has been documented along ultraslow spreading Gakkel Ridge have extensively sampled from ridge, yet these not systematically evaluated for nature extent of their alteration. Here, we present an analysis alte...

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The application of remote sensing sciences in the field geology is very diverse and wide. One its most important applications earth geological mapping. Mineral exploration using techniques done different ways, one them mapping alteration zones related to mineral resources. Given importance geosciences today's industry given that deposit-related areas are exploratory keys. this review study meth...

sorkheh-dizaj apatite-iron oxide deposit is located 32 km southeast of zanjan. the area is situated within the tarom subzone of western alborz-azarbaijan structural zone. the oldest units at the sorkheh-dizaj area are eocene trachyte, trachyandesite, olivine basalt and volcanoclastic brecciate tuff and lapilli tuff which intruded by a quartz-monzonite, monzonite and granite subvolcanic pluton o...

A shallow acid assemblage of sulfur and kaolinite +/alunite, dlclate and pyrophyllite dominates the hydrothermal alteration in the seven wells in Cawayan from surface down to 0 mRL. These zones range in thickness from 20 to 220 m. Thts shallow acid zone formed at temperatures < 160°C. Below 0 mFU down to -600 mRL, a deep acid zone of dlaspore and pyrophyllite +/alunite and dlclute appear in thi...

Hydrocarbon seeps cause chemical and mineralogical changes at the surface, which can be detected by remote sensing. This paper aims at the detection of mineral alteration induced by gas seeps in a marly limestone formation, SW Iran. For this purpose, the multispectral Advance Spaceborne Thermal Emission and Reflection Radiometer (ASTER) and the high spatial resolution WorldView-2 (WV-2) data we...

Alteration of fresh rock surfaces proceeds very rapidly in most terrestrial environments so that initial stages of modification of newly exposed surfaces are quickly masked by subsequent aqueous weathering processes. The hyper-arid and hypothermal environment of Beacon Valley, Antarctica, is limited in terms of available liquid water and energy available for alteration, which severely slows wea...

Riparian zones with extensive groundwater seeps may allow short-circuiting of groundwater to stream channels and modify groundwater contact with shallow organic soil layers in riparian areas. The controls on dissolved organic carbon (DOC) export to an Appalachian headwater stream were examined at Baldwin Creek (southwestern Pennsylvania), where baseflow is derived from multiple surface seeps. D...

Clay minerals are the signature of hydrothermal alterations related to fluid circulation in volcanic and crystalline rocks. In French part Upper Rhine Graben, deep-seated granites, illitic (illite I/S mixed layers (ml)) typical products structurally-controlled argillic alteration Paleozoic granitic basement. new Illkirch geothermal well, GIL-1, drill-cuttings were studied with various petrograp...

In this study, we demonstrate the strong potential of combining Unmanned Aerial Vehicle (UAV)-based thermal infrared (IR) and magnetic measurements to image state volcanic edifices, as well distribution active volcano-tectonic features at depth. Since magnetization is strongly dependent on temperature alteration, thermally structures are also associated with a decrease in magnetization. Based a...