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hydrothermal alteration

hydrothermal alteration

[‚hī·drə′thər·məl ‚ȯl·tə′rā·shən]
(geology)
Rock or mineral phase changes that are caused by the interaction of hydrothermal liquids and wall rock.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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References in periodicals archive
The project geology is dominated a NE-SW trending fold with a series of faults and shear zones developed on both limbs, most of which have undergone extensive hydrothermal alteration. The major stratigraphy is the Answer Slate unit of the Middle Proterozoic Mary Kathleen Group.
The magnetic-low has an irregular outline that is believed to correspond to hydrothermal alteration and destruction of the magnetite originally present in the rock, and may encompass several upwelling feeders.
Fault-related hydrothermal alteration of carbonate rocks, especially dolomitization, was a very important mechanism controlling the reservoir development [14-16].
Apollo Hill exhibits the hallmarks of a major mineralised system, showing extensive and intense hydrothermal alteration and deformation.
The Wire Lake Gold System (WLGS) extends over a strike length of >3 km and has a complex and protracted history of tectonic deformation, gold mineralization, hydrothermal alteration and magma injections.
Petrological studies show potassic metasomatism and localised hydrothermal alteration within the granitic host rocks.
Widespread sulphide mineralisation and hydrothermal alteration observed at surface
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