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Exploring: hydrothermal alteration

Use of multispectral scanner images for assessment of hydrothermal alteration in the Marysvale, Utah, mining area

Modified 2013-02-12
https://pubs.er.usgs.gov/publication/ofr82675 (HTML Document 15.60 KB)

Use of multispectral scanner images for assessment of hydrothermal alteration in the Marysvale, Utah, mining area Open-File Report 82-675 Superseding ... Publications: Download citation as: RIS Title: Use of multispectral scanner images for assessment of hydrothermal alteration in the Marysvale, Utah, mining area Series title: Open-File Report Series number: Year Published: ...

Hydrothermal alteration patterns in the Breitenbush Hot Springs area, Cascade Range, Oregon

Modified 2012-03-12
https://pubs.er.usgs.gov/publication/70013790 (HTML Document 16.45 KB)

Hydrothermal alteration patterns in the Breitenbush Hot Springs area, Cascade Range, Oregon By: The Publications Warehouse does not have links to ... been affected by at least two major episodes of hydrothermal alteration, one of which had temperatures in excess of 200??C. Alteration minerals in ... lavas; alteration effects in interbedded massive lava flows are much more subtle. Additional publication details Hydrothermal alteration patterns in the Breitenbush Hot Springs area, Cascade Range, Oregon Volume: 12 Publisher location: ... younger Tertiary rocks are characteristic of temperatures below 100??C. The most important factor in controlling alteration is fracture permeability. The ...

Stable isotopes in seafloor hydrothermal systems: Vent fluids, hydrothermal deposits, hydrothermal alteration, and microbial processes

Modified 2012-03-12
https://pubs.er.usgs.gov/publication/70023395 (HTML Document 14.90 KB)

Reviews in Mineralogy and Geochemistry By: The Publications Warehouse does not have links to digital versions of this publication at this time Download citation as: RIS Series title: Volume: 43 First page:

Chapter C: Hydrothermal Enrichment of Gallium in Zones of Advanced Argillic Alteration-Examples from the Paradise Peak and McDermitt Ore Deposits, Nevada

Modified 2012-02-02
https://pubs.er.usgs.gov/publication/b2209C (HTML Document 21.54 KB)

Chapter C: Hydrothermal Enrichment of Gallium in Zones of Advanced Argillic Alteration-Examples from the Paradise Peak and McDermitt Ore Deposits ... -hydrothermal environment, the zones of advanced argillic alteration associated with quartz-alunite (high sulfidation) Au-Ag deposits have the highest Ga ... magmatic-hydrothermal environment. Ga is depleted in the zone of opal+alunite alteration formed in a steam-heated environment, in residual silicified ... zones formed in a magmatic-hydrothermal environment, and in zones of supergene jarosite alteration. At the McDermitt Hg deposit, Ga is enriched in the ...

Conodont color and textural alteration: an index to regional metamorphism, contact metamorphism, and hydrothermal alteration.

Modified 2012-03-12
https://pubs.er.usgs.gov/publication/70014260 (HTML Document 16.97 KB)

Conodont color and textural alteration: an index to regional metamorphism, contact metamorphism, and hydrothermal alteration. Geological Society of ... contact metamorphism, as well as hydrothermal alteration. These experiments approximate the type of Colour Alteration Indices mixture characteristically ... Conodont color and textural alteration: an index to regional metamorphism, contact metamorphism, and hydrothermal alteration. Series title: Volume: 99 Issue: 4 First page: ...

Resources and Hazards of Hydrothermal Systems in Cascades Volcanoes

Modified 2016-12-20
https://minerals.usgs.gov/west/projects/cashaz.htm (HTML Document 10.51 KB)

States. Hydrothermal alteration is a manifestation of ore-forming processes and is characteristic of mineral deposits formed in continental-margin arcs ... . Hydrothermal alteration can result in severely weakened volcanic edifices that may be susceptible to failure and catastrophic landslides. Hydrothermal ... . Hydrothermal alteration occurs when rocks interact with hot fluids resulting in mass transfer between rocks and fluids and crystallization of hydrothermal ... waters, precipitation, or mixtures from all of these sources. Hydrothermal alteration resulting from interaction with extremely acidic fluids produces ...

Characteristics, extent and origin of hydrothermal alteration at Mount Rainier Volcano, Cascades Arc, USA: Implications for debris-flow hazards and mineral deposits

Modified 2012-03-08
https://pubs.er.usgs.gov/publication/70000255 (HTML Document 26.08 KB)

Characteristics, extent and origin of hydrothermal alteration at Mount Rainier Volcano, Cascades Arc, USA: Implications for debris-flow hazards and ... . Vallance Abstract Hydrothermal alteration at Mount Rainier waxed and waned over the 500,000-year episodic growth of the edifice. Hydrothermal minerals ... formed hydrothermal minerals. Relatively deeply formed magmatic-hydrothermal alteration minerals and associations in clasts include quartz (residual ... , whereas the proximal Electron Mudflow and a < 100??y BP rock avalanche on Tahoma Glacier also contain magmatic-hydrothermal alteration minerals that ...

Preliminary geologic map including argillic and advanced argillic alteration and principal hydrothermal quartz and alunite veins in the Tushar Mountains and adjoining areas, Marysvale volcanic field, Utah

Modified 2012-02-02
https://pubs.er.usgs.gov/publication/ofr81831 (HTML Document 16.16 KB)

Preliminary geologic map including argillic and advanced argillic alteration and principal hydrothermal quartz and alunite veins in the Tushar ... advanced argillic alteration and principal hydrothermal quartz and alunite veins in the Tushar Mountains and adjoining areas, Marysvale volcanic field ...

Hydrothermal alteration in oceanic ridge volcanics: A detailed study at the Galapagos Fossil Hydrothermal Field

Modified 2012-03-12
https://pubs.er.usgs.gov/publication/70017098 (HTML Document 20.44 KB)

Hydrothermal alteration in oceanic ridge volcanics: A detailed study at the Galapagos Fossil Hydrothermal Field Geochimica et Cosmochimica Acta The ... details of the hydrothermal alteration. Interlayered chlorite-smectite and chlorite with disequilibrium compositions dominate the secondary mineralogy ... marine hydrothermal systems. ?? 1994. Additional publication details Title: Hydrothermal alteration in oceanic ridge volcanics: A detailed study at the Galapagos Fossil Hydrothermal Field Series title: ... Hydrothermal Field is composed of altered oceanic crust and extinct hydrothermal vents within the eastern Galapagos Rift between 85??49???W and 85 ...

Map showing areas of limonitic hydrothermal alteration in the Lake City Caldera area, western San Juan Mountains, Colorado

Modified 2012-02-10
https://pubs.er.usgs.gov/publication/mf1868 (HTML Document 16.95 KB)

Map showing areas of limonitic hydrothermal alteration in the Lake City Caldera area, western San Juan Mountains, Colorado Miscellaneous Field ... : Map showing areas of limonitic hydrothermal alteration in the Lake City Caldera area, western San Juan Mountains, Colorado Series title: 1986 Language ...

Eocene cauldron, batholith, and hydrothermal alteration west of Ketchum, Idaho

Modified 2012-02-02
https://pubs.er.usgs.gov/publication/ofr86122 (HTML Document 15.46 KB)

Eocene cauldron, batholith, and hydrothermal alteration west of Ketchum, Idaho Open-File Report 86-122 Eocene cauldron, batholith, and hydrothermal ... alteration west of Ketchum, Idaho Series title: Open-File Report Series number: i, 5 p. :map ;28 cm. Part or all of this report is presented in ...

Textural, mineralogical and stable isotope studies of hydrothermal alteration in the main sulfide zone of the Great Dyke, Zimbabwe and the precious metals zone of the Sonju Lake Intrusion, Minnesota, USA

Modified 2012-03-12
https://pubs.er.usgs.gov/publication/70033591 (HTML Document 21.42 KB)

Textural, mineralogical and stable isotope studies of hydrothermal alteration in the main sulfide zone of the Great Dyke, Zimbabwe and the precious ... alteration of base-metal sulfides and mobilization of metals and S during hydrothermal alteration in both mineralized intrusions. Stable isotopic data ... hydrothermal alteration. However, such an interpretation is more tenuous for the precious metals zone of the Sonju Lake Intrusion where important Pt and Pd ... hydrothermal alteration. Experimental studies of magmatic crystallization and hydrothermal transport/deposition in systems involving arsenides ...

New K-Ar and 40Ar/39Ar ages of plutonism, hydrothermal alteration, and mineralization in the central Wasatch Mountains, Utah

Modified 2014-03-31
https://pubs.er.usgs.gov/publication/70100323 (HTML Document 18.73 KB)

New K-Ar and 40Ar/39Ar ages of plutonism, hydrothermal alteration, and mineralization in the central Wasatch Mountains, Utah Society of Economic ... : RIS New K-Ar and 40Ar/39Ar ages of plutonism, hydrothermal alteration, and mineralization in the central Wasatch Mountains, Utah Series title: Volume: 29 First page: ...

Cyclic development of igneous features and their relationship to high-temperature hydrothermal features in the Henderson porphyry molybdenum deposit, Colorado

Modified 2012-03-12
https://pubs.er.usgs.gov/publication/70014389 (HTML Document 18.80 KB)

fractures, which ultimately determine the distribution patterns of hydrothermal alteration and mineralization. -from Authors Additional publication details Series title: Economic Geology ... Abstract The Henderson porphyry molybdenum deposit was formed by the superposition of coupled alteration and mineralization events, of varying intensity and ... alteration. High-temperature alteration and mineralization are spatially and temporally linked to the crystallization of compositionally zoned magma in ... the apex of stocks. Differences in hydrothermal features associated with each intrusion (e.g., mass of ore, orientation and type of veins, density of ...

Hydrothermal alteration mineralogy in Newberry 2 drill core, Newberry Volcano, Oregon

Modified 2012-02-02
https://pubs.er.usgs.gov/publication/ofr8492 (HTML Document 15.49 KB)

Hydrothermal alteration mineralogy in Newberry 2 drill core, Newberry Volcano, Oregon Open-File Report 84-92 Hydrothermal alteration mineralogy in ...

A preliminary study of older hot spring alteration in Sevenmile Hole, Grand Canyon of the Yellowstone River, Yellowstone Caldera, Wyoming

Modified 2012-03-12
https://pubs.er.usgs.gov/publication/70035997 (HTML Document 21.33 KB)

hydrothermal alteration in the canyon walls. The altered outcrops of the post-collapse tuff of Sulphur Creek (480??ka) extend from the canyon rim to more than ... 300??m beneath it. The hydrothermal minerals are zoned, with an advanced argillic alteration consisting of an association of quartz (opal ... A preliminary study of older hot spring alteration in Sevenmile Hole, Grand Canyon of the Yellowstone River, Yellowstone Caldera, Wyoming Journal of ... ) + kaolinite ?? alunite ?? dickite, and an argillic or potassic alteration association with quartz + illite ?? adularia. Disseminated fine-grained pyrite or ...

Mineral and whole-rock compositions of seawater-dominated hydrothermal alteration at the Arctic volcanogenic massive sulfide prospect, Alaska

Modified 2012-03-12
https://pubs.er.usgs.gov/publication/70014366 (HTML Document 17.29 KB)

altered rocks overlying, underlying, and interlayered with semimassive sulfide mineralization. Hydrothermal alteration of wall rocks and deposition of ... by hydrothermal alteration-metasomatism. -from Author Additional publication details Series title: Economic Geology ... sulfide and gangue minerals were contemporaneous with Late Devonian of Early Mississippian basalt-rhyolite volcanism. Alteration developed asymmetrically ...

An assessment of hydrothermal alteration in the Santiaguito lava dome complex, Guatemala: implications for dome collapse hazards

Modified 2013-03-18
https://pubs.er.usgs.gov/publication/70041125 (HTML Document 24.96 KB)

An assessment of hydrothermal alteration in the Santiaguito lava dome complex, Guatemala: implications for dome collapse hazards Bulletin of ... , geochemistry, and remote sensing methods has been employed to determine the extent of hydrothermal alteration and assess the potential for failure at ... , hydrothermal alteration on the dome complex appears to be restricted to surficial deposits of hydrous silica, but the study has highlighted, importantly ... methods to make further assessments in the future. Study Area Title: An assessment of hydrothermal alteration in the Santiaguito lava dome complex, Guatemala: implications for dome collapse hazards Series title: Description: ...

MULTIPLE EPISODES OF IGNEOUS ACTIVITY, MINERALIZATION, AND ALTERATION IN THE WESTERN TUSHAR MOUNTAINS, UTAH.

Modified 2012-03-12
https://pubs.er.usgs.gov/publication/70013446 (HTML Document 17.57 KB)

out implciations for minerals exploration. The area has been subjected to recurrent episodes of igneous intrusion, hydrothermal alteration, and ... MULTIPLE EPISODES OF IGNEOUS ACTIVITY, MINERALIZATION, AND ALTERATION IN THE WESTERN TUSHAR MOUNTAINS, UTAH. Geological Survey Professional Paper ... report outlines the complex history of igneous activity and associated alteration and mineralization in the western Tushar Mountains, Utah and pointss ... to be expected vary from one hydrothermal system to another, and from one depth to another within any given system. Uranium and molybdenum seem likely ...

Field guide to hydrothermal alteration in the White River altered area and in the Osceola Mudflow, Washington

Modified 2014-04-08
https://pubs.er.usgs.gov/publication/b2217 (HTML Document 29.35 KB)

Field guide to hydrothermal alteration in the White River altered area and in the Osceola Mudflow, Washington Bulletin 2217 By: David A. John, James ... Rainier area and just north of Mt. St. Helens). Hydrothermal alteration is widespread in both Tertiary and Quaternary igneous rocks of the Cascades ... arcs. Most alteration in the Tertiary Western Cascades Arc resulted from hydrothermal systems associated with small plutons, some of which formed ... porphyry copper and related deposits, including copper-rich breccia pipes, polymetallic veins, and epithermal gold-silver deposits. Hydrothermal alteration ...