Classification and genesis of stockwork molybdenum deposits

Westra, Gerhard; Keith, Stanley B.

doi:10.2113/gsecongeo.76.4.844

Cited by 197 publications

(138 citation statements)

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“…Two distinct types of stockwork molybdenum systems have been Identified; a granite porphyry syste m and a fluorine-deficient system that more closely resembles porphyry copper deposits (White and others, 1982;Mutchler and others, 1981;Westra and Keith, 1981). Presently, Arizona has no active stockwork molybdenum mines, but a geologic environment favorable for a molybdenum porphyry system has been identified previously in the Cimarron Mountains (Tosdal, 1981).…”

Section: Stockwork Molybdenum Depositsmentioning

confidence: 89%

“…Typically zoned from Mo in the core to W and Sn to Cu and Mn and finally to Pb, U, and rare-earth elements on the periphery. Cu content is very low in core (White and others, 1982;Mutchler and others, 1981;Westra and Keith, 1981). The tungsten-tin zone that forms umbrella shaped mantles above the molybdenum mineralization Is minable in some cases.…”

Section: Strongly Favorable Criteriamentioning

confidence: 99%

“…High-silica alkali granite or rhyolite porphyry plufs or dikes containing high rubidium/strontium ratios and niobium (White and others, 1982;Mutchler and others, 1981;Westra and Keith, 1981). High-silica alkali granites that typically host or are associated genetically with Climax-type deposits are not exposed In the quadrangle.…”

Section: Strongly Favorable Criteriamentioning

confidence: 99%

“…2. Mesozoic or Tertiary age of pluton (White and others, 1982;Mutchler andothers, 1981, Westra andKeith, 1981). 3.…”

Section: Granite Stockwork Molybdenum Depositsmentioning

confidence: 99%

“…8. Argfllic and (or) propylitic alteration (White and others, 1982;Mutchler and others, 1981;Westra and Keith, 1981).…”

Section: Granite Stockwork Molybdenum Depositsmentioning

confidence: 99%

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Mineral occurrence map and tabulation of geologic, commodity, and production data, Ajo and Lukeville 1 degree by 2 degrees quadrangles, southwestern Arizona

1986

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Section: Stockwork Molybdenum Depositsmentioning

confidence: 89%

Section: Strongly Favorable Criteriamentioning

confidence: 99%

Section: Strongly Favorable Criteriamentioning

confidence: 99%

“…2. Mesozoic or Tertiary age of pluton (White and others, 1982;Mutchler andothers, 1981, Westra andKeith, 1981). 3.…”

Section: Granite Stockwork Molybdenum Depositsmentioning

confidence: 99%

“…8. Argfllic and (or) propylitic alteration (White and others, 1982;Mutchler and others, 1981;Westra and Keith, 1981).…”

Section: Granite Stockwork Molybdenum Depositsmentioning

confidence: 99%

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Mineral occurrence map and tabulation of geologic, commodity, and production data, Ajo and Lukeville 1 degree by 2 degrees quadrangles, southwestern Arizona

1986

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Petrogenesis and Mo mineralization of a granitic complex, Da Hinggan Mountains, NE China: insights from zircon U-Pb dating, major and trace element geochemistry, and Sr-Nd-Pb isotopes

et al. 2015

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Abundant Cu and Mo deposits are spatially related to granitic complexes in the Nuomin area, eastern Da Hinggan Mountains, China. The petrogenesis of these deposits is investigated using data from zircon U–Pb dating, whole‐rock major and trace element geochemistry, and Sr–Nd–Pb isotopic compositions. The results show that the fine‐grained biotite monzogranite and medium‐grained biotite syenogranite formed in a Late Jurassic (155.7 ± 3.6 Ma) collision environment, characterized by fluid–melt interaction and plagioclase differentiation. These rocks belong to the high‐K calc‐alkaline, K‐peraluminous series, indicating that the parent magma evolved from the low‐temperature partial melting of lower crust, with geochemistry consistent with Neoproterozoic oceanic crust. The monzonitic diorite porphyrite, monzonite porphyry (with a crystallization age of 130.64 ± 0.74 Ma) and quartz monzonite porphyry belong to the high‐K calc‐alkaline, sodic, quasi‐aluminous series. The results indicate petrogenesis in a post‐collisional or late‐orogenic tectonic environment, characterized by interactions with CO2‐rich fluid and the fractional crystallization of amphibole, biotite and apatite. The parent magma formed from the partial melting of residual Neoproterozoic oceanic crust. The circulation of mineralized fluids was related to the petrogenesis of the monzonitic diorite porphyrite, monzonite porphyry and quartz monzonite porphyry. Copyright © 2015 John Wiley & Sons, Ltd.

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Intrusion-Related Hydrothermal Mineral Systems

Pirajno

2009

Hydrothermal Processes and Mineral Systems

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Classification and genesis of stockwork molybdenum deposits

Cited by 197 publications

References 0 publications

Mineral occurrence map and tabulation of geologic, commodity, and production data, Ajo and Lukeville 1 degree by 2 degrees quadrangles, southwestern Arizona

Mineral occurrence map and tabulation of geologic, commodity, and production data, Ajo and Lukeville 1 degree by 2 degrees quadrangles, southwestern Arizona

Petrogenesis and Mo mineralization of a granitic complex, Da Hinggan Mountains, NE China: insights from zircon U-Pb dating, major and trace element geochemistry, and Sr-Nd-Pb isotopes

Intrusion-Related Hydrothermal Mineral Systems

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