Tectonic Framework of Disturbed Belt of West-Central Montana

Woodward, Lee A.

doi:10.1306/2f9197bf-16ce-11d7-8645000102c1865d

Bulletin

1981

DOI: 10.1306/2f9197bf-16ce-11d7-8645000102c1865d

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Tectonic Framework of Disturbed Belt of West-Central Montana

Lee A. Woodward¹

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Cited by 5 publications

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The origin and economic potential of sandstone-hosted disseminated Pb-Zn mineralization in pyritic shale horizons of the Mid-Proterozoic Newland Formation, Montana, USA

Schieber

1991

Mineral. Deposita

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Pyritic shale horizons of the Newland Formation (Belt Series, Mid-Proterozoic) show striking similarities to Proterozoic pyritic shales elsewhere that are host to major lead-zinc deposits, such as Mt. Isa and McArthur River. However, in contrast to these deposits the pyritic shales of the Newland Formation contain only minute quantities of lead and zinc. Elevated concentrations of lead and zinc are only found in pore spaces of intercalated sandstone beds. Petrographic and geochemical data indicate that pyritic shale deposition and elevated lead-zinc concentrations in sandstone beds are unrelated, that base metal mineralization is controlled by initial porosity, and that iron and base metals were derived from different sources.Petrographic studies show that base metal sulphides are diagenetic and resemble disseminated mineralization described from sandstone hosted lead-zinc and copper deposits in the Belt basin and elsewhere.

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The origin and economic potential of sandstone-hosted disseminated Pb-Zn mineralization in pyritic shale horizons of the Mid-Proterozoic Newland Formation, Montana, USA

Schieber

1991

Mineral. Deposita

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A comparative hydrocarbon soil-gas study of the Flathead Valley and Townsend Valley areas, Montana

Landrum

Richers

Maxwell

et al. 1989

Journal of Geochemical Exploration

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Aspects of the three-dimensional structure of the Alberta Foothills and Front Ranges

Fermor

1999

Geological Society of America Bulletin

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Tectonic Framework of Disturbed Belt of West-Central Montana

Cited by 5 publications

References 54 publications

The origin and economic potential of sandstone-hosted disseminated Pb-Zn mineralization in pyritic shale horizons of the Mid-Proterozoic Newland Formation, Montana, USA

The origin and economic potential of sandstone-hosted disseminated Pb-Zn mineralization in pyritic shale horizons of the Mid-Proterozoic Newland Formation, Montana, USA

A comparative hydrocarbon soil-gas study of the Flathead Valley and Townsend Valley areas, Montana

Aspects of the three-dimensional structure of the Alberta Foothills and Front Ranges

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