Results 31 to 40 of about 106,819 (219)

Geochemistry of skarn and porphyry deposits in relation to epithermal mineralization in the Arasbaran metallogenic zone, NE Tabriz, Iran [PDF]

open access: yes, 2020
The Arasbaran metallogenic zone in northern Iran is part of the Alborz-Azerbaijan magmatic zone, which developed along the southern margin of Eurasia during the Early Mesozoic-Late Cenozoic.
Radmard, Kaikhosrov   +4 more
core   +1 more source

ALTERATION MINERALS EXTRACTION USING AIRBORNE HYPERSPECTRAL DATA CASI AND SASI IN WUYI METALLOGENIC BELT, CHINA [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018
Hydrothermal alteration is an important content in the study of epithermal deposit, and its deep part is often accompanied by porphyry mineralization. The objective of research is to mapping the alteration minerals for mineral exploration using mixture ...
Z. Huang, J. Zheng
doaj   +1 more source

Trace Element Signatures in Pyrite and Marcasite From Shallow Marine Island Arc-Related Hydrothermal Vents, Calypso Vents, New Zealand, and Paleochori Bay, Greece

open access: yesFrontiers in Earth Science, 2021
Fluid conditions of shallow marine hydrothermal vent sites (<200 mbsl) in island arcs resemble those of subaerial epithermal systems. This leads to a distinct mineralization-style compared to deeper arc/back-arc (>200 mbsl) and mid-ocean ridge ...
Mark Nestmeyer   +8 more
doaj   +1 more source

Comparison of Different Algorithms to Map Hydrothermal Alteration Zones Using ASTER Remote Sensing Data for Polymetallic Vein-Type Ore Exploration: Toroud–Chahshirin Magmatic Belt (TCMB), North Iran

open access: yesRemote Sensing, 2019
Polymetallic vein-type ores are important sources of precious metal and a principal type of orebody for various base-metals. In this research, Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) remote sensing data were used for ...
Lida Noori   +6 more
doaj   +1 more source

Hydrothermal alteration and mineralization of the prospects at the northern flank of the Baimka ore zone, Western Chukotka

open access: yesИзвестия высших учебных заведений: Геология и разведка, 2021
Background. Some papers describing the deposits and prospects in the Baimka ore zone (Baimka Trend), the Chukotka Autonomous Region have been recently published.
A. V. Yusupova   +2 more
doaj   +1 more source

Gold in Mineralized Volcanic Systems from the Lesser Khingan Range (Russian Far East): Textural Types, Composition and Possible Origins

open access: yesGeosciences, 2021
While gold partitioning into hydrothermal fluids responsible for the formation of porphyry and epithermal deposits is currently well understood, its behavior during the differentiation of metal-rich silicate melts is still subject of an intense ...
Nikolai Berdnikov   +4 more
doaj   +1 more source

Comparison of indices for the prediction of nitrogen mineralization after destruction of managed grassland [PDF]

open access: yes, 2010
Intensively managed grasslands are occasionally chemically killed with herbicide and ploughed in order to grow an arable crop. After this management, large N mineralization rates with large losses to the environment are commonly observed.
Velthof, G.L., Smit, A.
core   +1 more source

Multiphase deformation, fluid flow and mineralization in epithermal systems : inferences from structures, vein textures and breccias of the Kestanelik epithermal Au-Ag deposit, NW Turkey [PDF]

open access: yes, 2023
We investigate the multiphase deformation, fluid flow, and mineralization processes in epithermal systems by presenting a detailed study of vein textures and breccias of the Kestanelik epithermal Au-Ag deposit, NW Turkey.
Shipton, Zoe K.   +2 more
core   +3 more sources

In-situ trace element and S isotope systematics in pyrite from three porphyry-epithermal prospects, Limnos Island, Greece

open access: yesFrontiers in Earth Science, 2022
Porphyry-epithermal systems associated with high-K calc-alkaline to alkaline igneous host rocks may be prospective for the recovery of Te among related elements like Cu, Ag, and Au. Limnos Island, as part of the Tethyan magmatic belt, is such an example,
Frederik Börner   +7 more
doaj   +1 more source

Active geothermal systems with entrained seawater as analogues for low-sulphidation epithermal mineralization [PDF]

open access: yes, 2005
The paradigm for low-sulphidation (LS) volcanic-arc associated mineralization is the active geothermal systems located along the Taupo Volcanic Zone (e.g. Broadlands). However, this analogue is inapt where fluid salinities are consistently in excess of 3.
Naden, Jonathan   +4 more
core   +1 more source

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