Commodity: Sample 1439 consisted of marly, limonitic and Mn-stained altered vein material with specular hematite on fracture surfaces, oxidized pyrite (and possibly magnetite) in quartz vein. Minor malachite (one speck observed. Rock is completely altered, somewhat silicified and dense.

Deposit: Shear (fissure) zone marked by abundant limonite and Mn oxides. "vein" has sharp contacts with limestone most rocks and cuts across their bedding at about 90 degrees. "vein" does not persist along strike to the east

Development: At time of examination in aug., 1983, shaft had been roped off and flagged within the past few weeks indicating recent sampling or examination of the workings.

Geology: Rock is locally cut by random calcite veinlets and stained by minor Fe oxides. Wall rocks are relatively unaltered and show only recrystallization and iron-staining As alteration effects. Limestone here strikes about n-5 and dips gently e. At the shaft. The limestone forms beds about 0.5-2.0 ft thick. Altered zone outcrops just E of shaft collar. Altered rock is punky in texture, somewhat silicified, stained and replaced by abundant limonite (plumbojarosite?) and Mn oxides calcite occurs in vugs, and minor quartz veining is evident.

Rock formation(s): Lyndon Limestone;Pioche Shale

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Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.

Mineral List

4 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

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Alphabetical List Tree Diagram

ⓘ Limestone

Detailed Mineral List:

ⓘ Calcite

Formula: CaCO₃

Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.

ⓘ Malachite

Formula: Cu₂(CO₃)(OH)₂

Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.

ⓘ Pyrite

Formula: FeS₂

Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.

ⓘ Quartz

Formula: SiO₂

Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘ	Pyrite	2.EB.05a	FeS₂
Group 4 - Oxides and Hydroxides
ⓘ	Quartz	4.DA.05	SiO₂
Group 5 - Nitrates and Carbonates
ⓘ	Calcite	5.AB.05	CaCO₃
ⓘ	Malachite	5.BA.10	Cu₂(CO₃)(OH)₂

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Malachite	Cu₂(CO₃)(OH)₂
C	Carbon
C	ⓘ Calcite	CaCO₃
C	ⓘ Malachite	Cu₂(CO₃)(OH)₂
O	Oxygen
O	ⓘ Calcite	CaCO₃
O	ⓘ Quartz	SiO₂
O	ⓘ Malachite	Cu₂(CO₃)(OH)₂
Si	Silicon
Si	ⓘ Quartz	SiO₂
S	Sulfur
S	ⓘ Pyrite	FeS₂
Ca	Calcium
Ca	ⓘ Calcite	CaCO₃
Fe	Iron
Fe	ⓘ Pyrite	FeS₂
Cu	Copper
Cu	ⓘ Malachite	Cu₂(CO₃)(OH)₂

References

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Year (asc) Year (desc) Author (A-Z) Author (Z-A)

Bentz, J. and Smith, P., (1983), Field Examination Report, Aug. 26, 1983

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Link to USGS MRDS:	10046425

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