A Statistical Study of Geological Characteristics of Porphyry-Copper-Molybdenum Deposits in the Cordilleran Belt-Application to the Rating of Porphyry Prospects

Geoffroy, Jérôme; Wignall, T. K.

doi:10.2113/gsecongeo.67.5.656

Cited by 19 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Bethlehem orebodies generally possess geologic, mineralogic, and geochemical features that are similar to those described for other porphyry copper-molybdenum deposits of continental western North America (e.g. Creasey, 1959Creasey, , 1966Creasey, , 1972Burnham, 1962;Titley and Hicks, 1966;Meyer and Hemley, 1967;Sutherland Brown, 1966Sutherland Brown and others, 1971;Lowell and Guilbert, 1970;Rose, 1970;James, 1971;and DeGeoffroy and Wignail, 1972), and especially in volcanic island-arc terrenes (e.g. Cox and others, 1973;Field and others, 1974;Kesler and others, 1975;Titley, 1975;Field and others, 1975;Kesler and others, 1977;and ECon.…”

Section: Summary Of Characteristicsmentioning

confidence: 66%

Proceedings of the Symposium on Mineral Deposits of the Pacific Northwest: Geological Society of America, Cordilleran Section meeting at Corvallis, Oregon, March 20-21, 1980

Field¹,

Berry²

1981

Open-File Report

View full text Add to dashboard Cite

show abstract

Section: Summary Of Characteristicsmentioning

confidence: 66%

Proceedings of the Symposium on Mineral Deposits of the Pacific Northwest: Geological Society of America, Cordilleran Section meeting at Corvallis, Oregon, March 20-21, 1980

Field¹,

Berry²

1981

Open-File Report

View full text Add to dashboard Cite

show abstract

“…Since then, several studies have emerged with the application of geostatistical techniques, mainly in the geology 5 , 11 , 19 and hydrology 20 areas, as well as in oil and gas studies 4 . More recently, we can observe the use of this technique in the area of public health, which allows the spatial estimation of the occurrence of diseases, homicides, and urban violence 10 , 15 , 20 .…”

Section: Methodsmentioning

confidence: 99%

Violência em transporte público: uma abordagem baseada em análise espacial

et al. 2017

View full text Add to dashboard Cite

OBJECTIVETo carry out a spatial analysis of the occurrence of acts of violence (specifically robberies) in public transportation, identifying the regions of greater incidence, using geostatistics, and possible causes with the aid of a multicriteria analysis in the Geographic Information System.METHODSThe unit of analysis is the traffic analysis zone of the survey named Origem-Destino, carried out in Salvador, state of Bahia, in 2013. The robberies recorded by the Department of Public Security of Bahia in 2013 were located and made compatible with the limits of the traffic analysis zones and, later, associated with the respective centroids. After determining the regions with the highest probability of robbery, we carried out a geographic analysis of the possible causes in the region with the highest robbery potential, considering the factors analyzed using a multicriteria analysis in a Geographic Information System environment.RESULTSThe execution of the two steps of this study allowed us to identify areas corresponding to the greater probability of occurrence of robberies in public transportation. In addition, the three most vulnerable road sections (Estrada da Liberdade, Rua Pero Vaz, and Avenida General San Martin) were identified in these areas. In these sections, the factors that most contribute with the potential for robbery in buses are: F1 - proximity to places that facilitate escape, F3 - great movement of persons, and F2 - absence of policing, respectively.CONCLUSIONSIndicator Kriging (geostatistical estimation) can be used to construct a spatial probability surface, which can be a useful tool for the implementation of public policies. The multicriteria analysis in the Geographic Information System environment allowed us to understand the spatial factors related to the phenomenon under analysis.

show abstract

“…Most porphyry-metal systems are associated with salic varieties of calcalkalic igneous rocks (De Geoffrey and Wignall, 1972;Ishihara, 1967), but the more relevant petrographic association is textural and structural (Carson and Jambor, 1974, p. 131;Stringham, 1966), a pertinence manifest in the name "porphyry-metal". The characteristic textures of the intrusive igneous rocks are porphyroclastic porphyritic with coarse-grained to aphanitic and even glassy groundmasses, to mylonitic, and aplitic to aphanitic.…”

Section: The Modelmentioning

confidence: 99%

The architecture of the porphyry-metal system as a prospecting stratagem in the Southern Rocky Mountains

Neuerburg¹

1978

Open-File Report

View full text Add to dashboard Cite

A model of the porphyry-metal system characteristic of the consanguineous Cretaceous and Tertiary igneous rocks and associated ores of the southern Rocky Mountains is constructed from the bits and pieces exposed in the Colorado mineral belt and the San Juan volcanic field. Hydrothermally altered rocks in a part of the areas of mineralized rock associated with the Platoro caldera are matched against the model, to locate and to characterize latent mineral deposits for optimal prospecting and exploration. The latent deposits are two stockwork molybdenite deposits (porphyry-molybdenum) and one or two copper-gold-silver chimney deposits.

show abstract

A Statistical Study of Geological Characteristics of Porphyry-Copper-Molybdenum Deposits in the Cordilleran Belt-Application to the Rating of Porphyry Prospects

Cited by 19 publications

References 0 publications

Proceedings of the Symposium on Mineral Deposits of the Pacific Northwest: Geological Society of America, Cordilleran Section meeting at Corvallis, Oregon, March 20-21, 1980

Proceedings of the Symposium on Mineral Deposits of the Pacific Northwest: Geological Society of America, Cordilleran Section meeting at Corvallis, Oregon, March 20-21, 1980

Violência em transporte público: uma abordagem baseada em análise espacial

The architecture of the porphyry-metal system as a prospecting stratagem in the Southern Rocky Mountains

Contact Info

Product

Resources

About