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Hilltop Extension Mine (Lilly & Whale Groups), California Mining District, Cochise County, Arizona, USAi
Regional Level Types
Hilltop Extension Mine (Lilly & Whale Groups)Mine
California Mining DistrictMining District
Cochise CountyCounty

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Latitude & Longitude (WGS84):
31° 59' 26'' North , 109° 15' 46'' West
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
Rodeo101 (2015)27.7km
San Simon165 (2011)31.0km
Cotton City388 (2011)37.7km
Sunizona281 (2011)38.8km
Bowie449 (2011)42.9km

‡Ref.: Sabins, F.F., Jr. (1957) Geology of the Cochise Head and western part of the Vanar quadrangles, Arizona [San Simon Cienega, Blue Mountain, Cochise Head, Bowie Mtn. South, Vanar, Vanar NW, Little Wood Canyon, Bowie Mtn. North 7.5 min]: Geological Society of America Bulletin: 68(10): 1315-1341, 1 sheet, scale 1:62,500.

Keith, Stanton B. (1973), Arizona Bureau of Geology & Mineral Technology, Geological Survey Branch Bull. 187: 52 (Table 4).

Brown, S.D. (1993) U.S. Bureau of Mines Open-File Report, Mineral Land Assessment (MLA) 12-93, 188 p.: 86.

Niemuth, N.J. & K.A. Phillips (1992), Copper Oxide Resources, Arizona Department of Mines & Mineral Resources Open File Report 92-10: 5 (Table 1).

USGS Rustler Park Quadrangle topo map.

USGS Cochise Head Quadrangle topo map.

MRDS database Dep. ID file #10046198, MRDS ID #M241042; and, Dep. ID #10186041, MAS ID #0040030155.

A former small underground Pb-Ag-Zn-Cu-Au-Mo mine located in the SE ¼ sec. 28 to the SW ¼ sec. 34, T.16S., R.30E. (Rustler Park 7.5 minute topo map), 1 mile E and NE of the Hilltop Mine. The Hilltop Extension is an area of claims east of the Hilltop Mine for which production was reported separately. Deposits are slightly higher in the section than at the Hilltop Mine. Owned at times by the Hilltop Extension Mining Co., Arizona Monte Cristo Mining Co., and the Calumet Divide Mining Co.

Mineralization is base metal sulfides and carbonates in quartz veins and in pyrometasomatic deposits in silicified and tilted Paleozoic limestones cut by Laramide or Tertiary intrusives. Host rock units include the Escabrosa Limestone and the Lower Naco Group. Alteration included silicification.

Local structures include NW-trending Paleozoic beds that dip 40-45W in this area.

Workings include extensive workings from several tunnels. One tunnel is 570 feet long, in 1927, one 300 foot tunnel, 100 foot deep winze, a 300 foot raise, and a 200 foot drift. A total of 400 tons of ore was shipped intermittently from 1923 to 1940. Some ore carried 60% Pb, 50 oz/t Ag.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

4 valid minerals.

Detailed Mineral List:

Formula: CuFeS2
Reference: MRDS database Dep. ID file #10046198, MRDS ID #M241042.
Formula: PbS
Reference: MRDS database Dep. ID file #10046198, MRDS ID #M241042.
Formula: FeS2
Reference: MRDS database Dep. ID file #10046198, MRDS ID #M241042.
Formula: ZnS
Reference: MRDS database Dep. ID file #10046198, MRDS ID #M241042.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
AmBnXp, with (m+n):p = 1:1
AmBnXp, with (m+n):p = 1:2

List of minerals for each chemical element

S ChalcopyriteCuFeS2
S GalenaPbS
S SphaleriteZnS
S PyriteFeS2
Fe ChalcopyriteCuFeS2
Fe PyriteFeS2
Cu ChalcopyriteCuFeS2
Zn SphaleriteZnS
Pb GalenaPbS
USGS MRDS Record:10046198

Other Regions, Features and Areas containg this locality

North America PlateTectonic Plate

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