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Alkaline rock complexes in the Wet Mountains area, Custer and Fremont Counties, Colorado

Alkaline rock complexes in the Wet Mountains area, Custer and Fremont Counties, Colorado

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Published by U.S. Dept. of the Interior in Washington .
Written in English

    Subjects:
  • Geology, Colorado

  • Edition Notes

    11

    The Physical Object
    Pagination33 p.
    Number of Pages33
    ID Numbers
    Open LibraryOL22011727M

    The Iron Mountain Mine is a iron, titanium, metal, and vanadium mine located in Fremont county, Colorado at an elevation of 7, feet. Alkaline rock complexes in the Wet Mountains area, Custer and Fremont counties, Colorado: U.S. Geological Survey Professional Geology and resources of thorium and associated elements in the Wet. Gem Mine, Gem Park complex, Fremont Co., Colorado, USA: Ref.: Eckel, Edwin B. (), Minerals of Colorado, updated & revised: This old mine, known since Cross (), is near the valley floor on the southern slopes of Gem Mountain on the North side.

    It is possibly titaniferous magnetite similar to that at Iron Mountain which is about seven miles northeast of the Gem Park district in the McClure Mountain igneous complex. T.J., , Alkaline rock complexes in the Wet Mountains area, Custer and Fremont elements in the Wet Mountains area, Fremont and Custer counties, Colorado: U.S. complex, whereas in Democrat Gulch the breccias are adjacent to or near the syenite body (Fig. 1). The district lies on the north and northwest sides of the Mcclure Mountain-rron Mountain complex in Fremont county, colorado, mainly on the south side of the Arkansas River (Fig. 1). Because of the rugged terrain and few roads, the area is.

    Alkaline rock complexes in the Wet Mountains area, Custer and Fremont Not In Library Geology of the Aspen minute quadrangle, Pitkin and Gunnison Countie. PDF | The Raton Coal Basin of Colorado and New Mexico is one of the premier coal basins where the Cretaceous/Tertiary boundary can be viewed and samples | Find, read and cite all the research.


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Alkaline rock complexes in the Wet Mountains area, Custer and Fremont Counties, Colorado Download PDF EPUB FB2

ALKALINE ROCK COMPLEXES IN THE WET MOUNTAINS AREA, CUSTER AND FREMONT COUNTIES, COLORADO By THEODORE J. ARMBRUSTMACHER ABSTRACT Three alkaline intrusive complexes of Cambrian age occur in the Wet Mountains area, Colorado.

The McClure Mountain Complex con­ sists of mafic-ultramafic cumulates, hornblende-biotite syenites,Cited by: 9. Alkaline Alkaline rock complexes in the Wet Mountains area Complexes in the Wet Mountains Area, Custer and Fremont Counties, Colorado: Usgs Professional Paper [Armbrustmacher, Theodore J.] on *FREE* shipping on qualifying offers.

Alkaline Rock Complexes in the Wet Mountains Area, Custer and Fremont Counties, Colorado: Usgs Professional Paper Alkaline rock complexes in Alkaline rock complexes in the Wet Mountains area Wet Mountains area, Custer and Fremont counties, Colorado Alkaline rock complexes in the Wet Mountains area, Custer and Fremont counties, Colorado Professional Paper By: Theodore J.

Armbrustmacher. Alkaline Rock Complexes in the Wet Mountains Area, Custer and Fremont Counties, Colorado: Usgs Professional Paper Theodore J Armbrustmacher: Books - or: Theodore J Armbrustmacher.

Alkaline rock complexes in the Wet Mountains area, Custer and Fremont counties, Colorado (OCoLC) Material Type: Government publication, National government publication: Document Type: Book: All Authors / Contributors: Theodore J Armbrustmacher; Geological Survey (U.S.).

Alkaline rock complexes in the Wet Mountains area, Custer and Fremont counties, Colorado (DLC) (OCoLC) Material Type: Document, Government publication, National government publication, Preschool, Internet resource: Document Type:. Alkaline Rock Complexes in the Wet Mountains Area, Custer and Fremont Counties, Colorado: Usgs Professional Paper | Theodore J Armbrustmacher | ISBN: | Kostenloser Versand für alle Bücher mit Versand und Verkauf duch : Taschenbuch.

Buy Alkaline rock complexes in the Wet Mountains area, Custer and Fremont counties, Colorado (Geological Survey professional paper) by Theodore J Armbrustmacher (ISBN:) from Amazon's Book Store. Everyday low prices and free delivery on eligible : Theodore J Armbrustmacher.

Concentrations of Rb, Sr, and REE (rare earth elements), and Sr-isotopic ratios in rocks of the Cambrian alkaline complexes in the Wet Mountains area, Colorado, show that rocks formed as end-products of a variety of magmas generated from different source materials.

The complexes generally contain a bimodal suite of cumulus mafic-ultramafic rocks and younger leucocratic rocks that include nepheline syenite and hornblende-biotite syenite Cited by: 6.

The Iron Hill alkaline complex, Powderhorn district, Colorado, is situated ~ km west of the alkaline complexes of the Wet Mountains area (Fig. 1; Olson et al., ) and is considered “the best example of the carbonatite-alkalic rock association in the United States” by Olson and Hedlund (, p.

Published Soil Surveys for Colorado. Current, official soil survey information is on the Web Soil Survey. The Web Soil Survey allows you to create custom reports by selecting a specific area of interest. In the table below, clicking on a survey area that is listed as "current" takes you to the Web Soil Survey.

Genetic implications of minor-element and Sr-isotope geochemistry of alkaline rock complexes in the Wet Mountains area, Fremont and Custer counties, Colorado Article Dec THE WET MOUNTAINS, COLORADO; A PROGRESS REPORT By R.

CHRISTMAN, M. BROCK, R. PEARSON, and Q. SINGEWALD ABSTRACT The McKinley Mountain area, a square mile tract of Precambrian rocks that contain thorium-bearing veins, lies on the west flank of the Wet Mountains, Ouster and Fremont Counties, by: 7.

Genetic implications of minor-element and Sr-isotope geochemistry of alkaline rock complexes in the Wet Mountains area, Fremont and Custer counties, Colorado Theodore J. Armbrustmacher, Carl E. Hedge Pages Concentrations of Rb, Sr, and REE (rare earth elements), and Sr-isotopic ratios in rocks of the Cambrian alkaline complexes in the Wet Mountains area, Colorado, show that rocks formed as end-products of a variety of magmas generated from different source materials.

Genetic implications of minor-element and Sr-isotope geochemistry of alkaline rock complexes in the Wet Mountains area, Fremont and Custer counties, Colorado. Contributions to Mineralogy and Petrology, Vol. 79, Issue. 4, p. Cited by: Wet Mountains Area, Custer Co., Colorado, USA: Antelope Creek District - fluorspar Thorium (Th) and rare earth elements (REE) are noted in veins, syenite dikes, fracture zones, and carbonatite dikes (Armbrustmacher, ) associated with three.

whole-rock ages between and Ma (Lidgeois and Black, Ba et al. In this region, the alkaline complexes show a distinctive change in the degree of alkalinity and silica-saturation with time: Palaeozoic complexes are generally oversaturated, whereas undersaturated rocks and a carbonatite appear.

Alkaline rock, any of various rocks in which the chemical content of the alkalies (potassium oxide and sodium oxide) is great enough for alkaline minerals to minerals may be unusually sodium rich, with a relatively high ratio of alkalies to silica (SiO 2), as in the alkaline minerals have a high ratio of alkalies to alumina (Al 2 O 3), as in aegirine pyroxene and.

Alkaline Rock Complexes in the Wet Mountains Area, Custer and Fremont Counties, Colorado. Geological Survey Professional Paper Armbrustmacher, T.

J., and I. Brownfield. Carbonatites in the Wet Mountains Area, Custer and Fremont Counties, Colorado--Chemical and Mineralogical Data. Geological Survey Open-File Report.

Independently oriented core samples (72) and hand samples (12) were collected from 12 dikes and other intrusions around the McClure Mountains igneous complex in the Wet Mountains area in southern Colorado.

Paleomagnetic core samples were collected in the field with a water-cooled, gasoline-powered drill and oriented with magnetic and sun : Anthony F. Pivarunas, Joseph G.

Meert.*Alkaline rock complexes in the Wet Mountains area, Custer and Fremont Counties, Colorado / by Theodore J. Armbrustmacher. - Washington: United States government printing office, Interesting facts about the McClure Mountain Complex: – The Complex is a square-mile igneous intrusion.

– This Cambrian-aged syenite ( million years old) intruded into much older rock, a Precambrian migmatite gneiss ( billion years old). Thus, the McClure Mountain Complex syenite is over a billion years younger than surrounding rocks.