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Unnamed Rutile Occurrence

Occurrence in Jefferson county in Colorado, United States with commodities Titanium, Metal, Zinc
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Ore body information
  12. Economic information about the deposit and operations
  13. Mining district
  14. Land status
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10090176
MRDS ID D010181
Record type Site
Current site name Unnamed Rutile Occurrence

Geographic coordinates

Geographic coordinates: -105.39948, 39.68832 (WGS84)
Elevation 2475
Relative position 9.5 MILES S 60 W FROM GOLDEN

Site location context

Political divisions (FIPS codes)

Clear Creek(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Saddleback Mountain(quadrangle 1:24,000 scale)

Denver West(quadrangle 1:100,000 scale)

Denver(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Clear(hydrologic unit)

South Platte(hydrologic accounting unit)

South Platte(hydrologic subregion)

Missouri(hydrologic region)

Geographic areas

Country State County
United States Colorado Jefferson
United States Colorado Clear Creek

Public Land Survey System information

Meridian Township Range Section Fraction State
6th Principal 004S 072W 23,24 Colorado

Comments on the location information

  • ACROSS SODA CREEK AND SNYDER GULCH. ELEV AND LAT-LONG GIVEN ARE FOR SAMPLE SITE APPROX MIDWAY ON DEPOSIT. ; INFO FROM LAND.ST :(1975)

Commodities

Commodity Importance
Titanium, Metal Critical Tertiary
Zinc Critical Tertiary

Materials information

Materials Type of material
Gahnite Ore
Rutile Ore
Apatite Gangue
Sillimanite Gangue
Topaz Gangue
Zircon Gangue

Analytical data

Result MODAL ANALYSES (IN VOLUME %) OF 7 SAMPLES OF TOPAZ-QUARTZ GNEISS AND SILLIMANITIC TOPAZ-QUARTZ GNEISS GAVE 1.7 TO 3.1% RUTILE, 1 TO 44.8% SILLIMANITE, 0.4 TO 0.6% (LOW) AND 30.1 TO 71.9% (HIGH) TOPAZ, 5.5 TO 84.4% QUARTZ, 0.2 TO 13.0% APATITE, TRACE TO 0.3% ZIRCON. MINERALOGICAL COMPOSITION (IN WEIGHT %) BASED ON MINERAL SEPARATES FROM RUTILE-BEARING TOPAZ-QUARTZ GNEISS: 3 GRAB SAMPLES CONTAINED 0.6 TO 1.4% RUTILE AND 22 TO 51% TOPAZ
Result 3 11- TO 100-FT-THICK-INTERVAL COMPOSITE CHIP SAMPLES CONTAINED 2.2 TO 4.2% RUTILE AND 23 TO 67% TOPAZ. SEMIQUANTITATIVE SPECTROGRAPHIC ANALYSES OF RUTILE CONCENTRATES GAVE 0.3 TO 0.7% FE AND 500 TO 1500 PPM NB.

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Pegmatite
    Rock unit name Pegmatite
    Rock description Pegmatite
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
  • Host or associated Host
    Rock type Metamorphic Rock > Gneiss
    Rock unit name Rutile-Bearing Gneisses;Interlayered Hornblende Gneiss, Calc-Silicate Gneiss, And Amphibolite
    Rock description Rutile-Bearing Gneisses;Interlayered Hornblende Gneiss, Calc-Silicate Gneiss, And Amphibolite

Nearby scientific data

(1) -105.39948, 39.68832
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Front Range Uplift
Type of structure Local
Structure description Kennedy Gulch Fault Zone, Floyd Hill Fault Zone

Ore body information

  • General form LENTICULAR
    Thickness 30.48M

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1968
Discoverer D.M. Sheridan

Mining district

District name Clear Creek Pegmatite Province

Land status

Ownership category Private

Comments on the workings information

  • EXPLORATORY TRENCHES

Comments on development

  • RUTILE DISCOVERED BY MICROSCOPIC EXAMINATION OF THIN SECTIONS

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit SILLIMANITIC TOPAZ-QUARTZ GNEISS IS ONE OF SEVERAL RUTILE-BEARING GNEISSES OCCURRING IN HORNBLENDE GNEISS SEQUENCE TRENDING WNW WITH NEAR-VERTICAL DIPS. PRINCIPAL RUTILE UNIT IS 11- TO 100-FT-THICK LENTICULAR BODY RECOGNIZED OVER STRIKE LENGTH OF 7000 FT. OTHER RUTILE GNEISSES TRACED SEVERAL MILES TO NW. RUTILE GRAINS ARE MOLDED AROUND TOPAZ AND INTERGROWN WITH PRISMATIC SILLIMANITE AND CONTAIN ACCESSORY APATITE AND ZIRCON BUT LACK MAGNETITE, ILMENITE, GARNET, AND SPHENE, WHICH OCCUR IN ADJACENT ROCKS. CHEMICALLY RESISTANT MINERALOGY, HIGH FLUORINE CONTENT, AND DEPLETION OF SEVERAL COMMON ELEMENTS (FE, ALKALI METALS, AND ALKALINE EARTHS) SUGGEST ORIGIN BY FLUORINE METASOMATISM, IN WHICH FLUORINE, AL, AND TI WERE ADDED OR ENRICHED.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-1983 Schwochow, Stephen D. Colorado Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site

Authoritative Colorado resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.