Argillic-Advanced Argillic Alteration

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Argillic-Advanced Argillic Alteration

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Argillic-Advanced Argillic Alteration:
Hydrothermal alterations in which clay minerals are introduced
Other definitions:Wikipedia Reegle


Yelow-whitish rocks denote advanced argillic alteration with abundant alunite. http://cms.unige.ch/sciences/terre/research/Groups/mineral_resources/deposits/deposits_slides_i.php

Argillic and Advanced Argillic alteration are shallow types of alteration encountrered in a variety of different types of hydrothermal systems. Argillic alteration forms at lower temperatures and primarily consists of kaolinite + montmorillonite clay minerals. Advanced Argillic alteration forms at higher temperatures and lower pH conditions (e.g. the acid-steam condensate zone of a hydrothermal system). It consists primarily of kaolinite + dickite clay minerals at lower temperatures and pyrophyllite + andalusite minerals at temperatures > 300°C. Advanced Argillic alteration may also be associated with alunite.

Examples

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CSV
Geothermal
Resource
Area
Geothermal
Region
Control
Structure
Host
Rock
Age
Host
Rock
Lithology
Mean
Capacity
Mean
Reservoir
Temp
Blue Mountain Geothermal Area Northwest Basin and Range Geothermal Region Intrusion Margins and Associated Fractures
Fault Intersection
Triassic Metasedimentary 49.5 MW49,500 kW
49,500,000 W
49,500,000,000 mW
0.0495 GW
4.95e-5 TW
470.15 K197 °C
386.6 °F
846.27 °R
Kizildere Geothermal Area Aegean-West Anatolian Extensional Region Fault Intersection Miocene Limestone 102 MW102,000 kW
102,000,000 W
102,000,000,000 mW
0.102 GW
1.02e-4 TW
459.15 K186 °C
366.8 °F
826.47 °R
Salt Wells Geothermal Area Northwest Basin and Range Geothermal Region 23.6 MW23,600 kW
23,600,000 W
23,600,000,000 mW
0.0236 GW
2.36e-5 TW
466.15 K193 °C
379.4 °F
839.07 °R
Valles Caldera - Sulphur Springs Geothermal Area Rio Grande Rift Fault Intersection
Stratigraphic Boundaries
Caldera Rim Margins
Precambrian; Mississippian-Pennsylvanian; Pleistocene, 1.6 to 1.25 Ma; Pliocene; Miocene Crystalline basement “pCu”; Limestone-Madera Formation “MIPu”; Rhyolitic tuff-Bandelier Tuff (upper Tshirege “Qbt” and lower Otowi “Qbo” members); Caldera Fill Rhyolite (shallow); Dacitic/Andesitic to Rhyolitic lavas and tuffs-Keres Group Volcanics (shallow); Santa Fe Group volcaniclastics “Tsf”