Mine detail: Henderson Mine

Previously called ''

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Location

Lat / long:

39.76916, -105.84199

Resource(M)

Primary:	Molybdenum
Tertiary:	Lead, Zinc, Tungsten, Tin, Iron
Ore:	Molybdenite
Gangue:	Fluorite, Galena, Hematite, Huebnerite, Magnetite, Pyrite, Quartz, Sericite, Sphalerite, Topaz, Rhodochrosite
Orebody form:	ELLIPTICAL IN PLAN, UMBRELLA SHAPED IN PROFILE
Discovery year:	1965

Production

Operation type:	Underground
Production size:	Large
Development status:	Producer
First production started:	1976

Geology

Host rock:	Urad porphyry, Primos porphyry, Henderson granite
Host type:	Granitoid,Granite
Structure:	Front Range Uplift, Silver Plume Batholith, Colorado Mineral Belt, Straight Cr., Vasquez Cr., Loveland Pass-Berthoud Pass Fault Zones
Alteration processes:	Argillic Griesen Below Ore Body. Quartz, Quartz-Topaz-Magnetite, Quartz-Sericite-Pyrite, Argillic, And Propylitic Zones Progressively Above Ore Body

References

MRDS	D008022
DEP	10012410
Reference	{Deposit:: AMAX, (NO DATE), HENDERSON: CLIMAX MOLYBDENUM CO. BROCHURE, 25 P.}{Deposit:: THE HENDERSON MINE (MILL) CONCENTRATOR: JOUR. METALS, V. 29, NO. 10 (OCTOBER 1977), P. 9-12.}{Deposit:: DESBOROUGH, G.A., AND MIHALIK, PETER, 1980, ACCESSORY MINERALS IN THE IGNEOUS HOST OF MOLYBDENUM ORE, HENDERSON MINE, COLORADO: USGS OPEN-FILE REPT 80-661, 16 P.}{Deposit:: WALLACE, S.R., AND OTHERS, 1978, GEOLOGY OF THE URAD AND HENDERSON MOLYBDENITE DEPOSITS, CLEAR CREEK COUNTY, COLORADO, WITH A SECTION ON A COMPARISON OF THESE DEPOSITS WITH THOSE AT CLIMAX, COLORADO: ECON. GEOLOGY, V. 73, P. 325-368.}{Deposit:: COLORADO DIV. MINES ANN. OPERATOR REPTS.}{Deposit:: PETERSON, EILEEN K., 1992, USBM MINERALS TODAY OCT. 1992, P.30.}{Geology:: Carten, R.B., Geraghty, E.P., Walker, B.M., and Shannon, J.R., 1988, Cyclic development of igneous features and their relationship to high-temperature hydrothermal features in the Henderson porphyry molybdenum deposit, Colorado: Economic Geology, v. 83, p. 266-296}{Geology:: Seedorf, E., and Einaudi, M. T., 2004, Henderson porphyry molybdenum system, Colorado, Part I: Economic Geology, v. 99, p.3-37; Part II: Economic Geology, v. 99, p. 39-72.}{Production:: COLO. DIV. MINES ANN. OPERATOR REPTS.}
Reporter	Schwochow, Stephen D., Berger, Mary A., Moyer, Lorre A. (Marcus, S.M.), Beach, Richard A., Melton, Greg