Reconnaissance of Iron Occurrences in Colorado Page: 55
v, 82 p. : ill., map. ; 26 cm.View a full description of this report.
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FIGURE 11. - Old Workings and Limonite in Creek Bed Near Head of Handcart Gulch,
Park County, Colo.
The deposits vary in composition, texture, and iron content and are
still being formed. They run from dry, well-consolidated, porous-to-hard,
and almost pure limonite to loose, unconsolidated, mushy-to-firm mixtures
of limonite, bog material, sand, and gravel. Limonite also coats and cements
small fragments of slide rock. The better limonite deposits are upstream in
Handcart Gulch. The iron is taken into solution where ground waters pass over
the oxidizing, pyritic wash of Red Cone Mountain and is precipitated as limo-
nite, goethite, turgite, etc., in the swampy creek bottoms.
The deposits are similar to those in the Snake River drainage basin in
Summit County. Following are assays of the limonite reported from various
sources.
Spectrographic analyses show 0.001-0.01 percent gallium, zirconium, and
chromium; 0.001-1.0 percent lead and titanium; and 0.01-0.1 percent copper
and manganese.
Two shallow cuts in Handcart Gulch and a few small pits in the bog-iron
and gravel mixture in Hall Valley are the only accessible workings in the
deposits.
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Harrer, C. M. & Tesch, W. J., Jr. Reconnaissance of Iron Occurrences in Colorado, report, 1959; Washington D.C.. (https://digital.library.unt.edu/ark:/67531/metadc170710/m1/67/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.