Sedimentologic, Diagenetic, and Geochemical Analysis of Upper Mesozoic Ribbon Cherts from the Franciscan Assemblage at the Marin Headlands, California

S. M. Karl

Pacific Section SEPM

.... Hydrothermal sources appear more important near the greenstone, as indicated by the decrease of Fe and Mn up-section. Most previous workers have found that Al...

Cenozoic Rocks of the Intermontane Basins of Western Montana and Eastern Idaho: A Summary

Robert W. Fields, Donald L. Rasmussen, Alan R. Tabrum, Ralph Nichols

Rocky Mountain Section (SEPM)

... volcanics. Local volcanism subsided by late Eocene, but still-active centers shifted from andesites to basalts and rhyolites. Despite loss of local vents...

Engineering Geology for Design of the Kern River Pipeline in Southwestern Utah

Jeffrey R. Keaton

Utah Geological Association

... with volcanic processes were evaluated by assessing the proximity of the Kern River Pipeline alignment to Quaternary volcanic rocks, vents, or cones...

Field Trip B3: Geology and Volcanology of the Jurassic North Mountain Basalt, Southern Nova Scotia

Dan Kontak, Jaroslav Dostal, John Greenough

Atlantic Geoscience Society Special Publications

... are variable; $ lava can flow tens or more km through channel (near vent) to tube fed magma supply; $ source vents: fissures, central vents (e.g....

MASS BALANCE CORRECTIONS APPLIED TO LITHOGEOCHEMICAL DATA IN MINERAL EXPLORATION

EDWARD C. APPLEYARD

Saskatchewan Geological Society

... of active geothermal/hydrothermal phenomena from New Zealand and the Philippines and ancient 'granitization' effects from the Goldfields area...

Metallogenesis on Oceanic Plates--East Pacific Rise and Bauer Basin

Gary M. McMurtry

AAPG Special Volumes

... to a classical hydrothermal ore deposit, the surficial metalliferous sediments found along the crest of the East Pacific Rise (EPR) and Bauer basin resemble...

Geology of the Western San Juan Mountains

D.L. Baars, J.A. Ellingson

Four Corners Geological Society

.... Speculation! The answers have been removed by later intrusions, hydrothermal activity, and erosion. The first mine opened in the La Platas in 1878. Cross...

Oil and Gas Potential of the Central Utah Hingeline-Thrust Belt Region

Terence L. Britt, Eugene L. Howard

Rocky Mountain Association of Geologists

... by intensive hydrothermal alteration and mineralization. Phase VI The final phase ranges from Miocene to present time and marks the dramatic breakup...

From seep carbonates down to petroleum systems: An outcrop study from the southeastern France Basin

Jean-Philippe Blouet, Patrice Imbert, Anneleen Foubert, Sutieng Ho, Gerard Dupont

AAPG Bulletin

... geologists. Agirrezabala, L.M., 2009, Mid-Cretaceous hydrothermal vents and authigenic carbonates in a transform margin, Basque- Cantabrian Basin (western...

Geological-petrophysical insights in the deep Cambrian dolostone reservoirs in Tarim Basin, China

Jin Lai, Shichen Liu, Yi Xin, Song Wang, Chengwen Xiao, Qiuqiang Song, Xu Chen, Kefu Yang, Guiwen Wang, and Xiujian Ding

AAPG Bulletin

..., and hydrothermal dolostone. Fractures are an important factor in enhancing reservoir quality in dolostone reservoirs.  Conventional wire-line logs...

Extended Abstract: Advancing Models of Facies Variability and Lacustrine Source Rock Accumulation in Rifts: Implications for Exploration

Christopher A. Scholz

Africa Energy and Technology Conference, 2016

... in extensional systems. The role of rift-related magmatism is significant in these basins, both as drivers of hydrothermal systems around and within...

The Oxygen and Carbon Isotope Geochemistry of the Leadville Formation

David W. Beaty

Rocky Mountain Section (SEPM)

... of oxygen and carbon in Leadville limestone (Mississippian, Colorado) and its hydrothermal and metamorphic phases: Jour. Geol., v. 66, p. 374–393. Faure...

A Characterization of Two Western Wrangell Volcanic Debris Flows, Alaska - Abstract

Kristi L. Wallace

Alaska Geological Society

.... This deposit is classified as a cohesive volcanic debris avalanche based on the clay rich matrix resulting from hydrothermal alteration...

Abstract: Conceptual Models in Geothermal Hydrology, by W. K. Summers; #90979 (1975).

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Abstract: Mineral Resources of Permian and Pennsylvanian Rocks in Wyoming

Ray Harris, Dan Hausel

Earth Science Bulletin (WGA)

... and Pennsylvanian rocks host low temperature replacement copper and silver occurrences elsewhere in Wyoming, and host one hydrothermal replacement deposit...

Abstract: Genesis of Late Tournaisian lead + zinc + copper + baryte deposits in Ireland and Nova Scotia

M.J. Russell

Atlantic Geology

... an increase in temperature of hydrothermal fluids with time up to at least 265°C. Chalcopyri te is also paragenetically late at Walton and Tynagh...

Abstract: The Lazy Head tungsten-copper-zinc prospect, Guysborough County, Nova Scotia

William G. Shaw

Atlantic Geology

... and the mineralogy of the skarn suggest that metasomatic-hydrothermal processes, possibly associated with granitoid intrusion are responsible...

Abstract: Origin of Ore-Forming Fluids for Tertiary Gold-Silver Deposits in the Northern Black Hills, South Dakota

Nuri Uzunlar, Colin J. Paterson, F. J. Longstaffe

Earth Science Bulletin (WGA)

... mixing of waters in the aquifers in the lower Paleozoic formations. This mixing probably was the cause of gold deposition in these hydrothermal systems...

Abstract: Thermal history of the southwestern Meguma Zone, and Hercynian mineralization: an Argon Age Study

P. H. Reynolds, M. Zentilli, P. N. Elias, G. K. Muecke

Atlantic Geology

... with regional meta- hydrothermal activity in the Carboniferous morphism was perhaps an early precursor basins of Nova Scotia, and is consistent to the major...

ABSTRACT: Polymetallic Sulfides of Ocean Floor„A New Mineral Resource of the Pacific?

Alexander Malahoff

Circum Pacific Council Publications

... in diameter, formed during a period of intensive hydrothermal activity, lasting about 100 years. Preliminary chemical analyses suggest the sulfides...

GEOTHERMAL INVESTIGATIONS OF SELECTED MONTANA HOT SPRINGS

ROBERT A. CHADWICK, MICHAEL B. KACZMAREK

Montana Geological Society

... the presence of four distinct types of hydrothermal systems: warm springs in carbonate rock; hot springs in fractured, crystalline bedrock; hot...

ABSTRACT: SEAPSO Project in New Hebrides-Fiji-Tonga Area

J. M. Auzende, J. Daniel, J. P. Eissen, J. P. Foucher, B. Pontoise, J. Recy

Circum Pacific Council Publications

... in back-arc basins. First-order objectives in the North Fiji and Lau basins were to identify crustal accretion centers and to search for hydrothermal...

ABSTRACT: Miocene to Holocene Mineralization Associated with Manila Trench Subduction in Central Cordillera, Luzon, Philippines

Jean-Michel Boirat, Philippe Maleterre, Jean-François Stephan, Guillermo R. Balce, Louis Guilloux

Circum Pacific Council Publications

.... Hydrothermal activity related to these plutonic-volcanic complexes is responsible for various mineralizations, among which five types can be distinguished...

Geothermal Energy Resources in the Midcontinent

Don W. Steeples

Oklahoma City Geological Society

... in the sediments or to hydrothermal convection. Low-grade geothermal energy could be produced from brine that comes to the surface as a by-product of oil...

Abstract: A Review of Metamorphic Processes Affecting Alpine-Type Peridotites

John G. Spray

Atlantic Geology

... •oceanic' processes (hydrothermal alteration at spreading centres and in fracture zones and the basalt to eclogite transformation in subduction zones...