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San Juan Mine (San Juan group; Gordon Mine; Mann adit; Sulphide adit; Silver adit), Gordon Camp, Middle Pass District, Dragoon Mts, Cochise Co., Arizona, USA

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Latitude & Longitude (WGS84): 31° 52' 58'' North , 109° 58' 58'' West
Latitude & Longitude (decimal): 31.88278,-109.98278
GeoHash:G#: 9t9v3k0fx
Locality type:Mine
Köppen climate type:BSk : Cold semi-arid (steppe) climate


A former medium-sized underground Zn-Pb-Ag (Bi-Be-Li-Ga-Cd) mine located on 14 claims in the center of sec. 10, T.18S., R.23E., west-central part of the Dragoon Range, about ½ mile south of China Peak. Discovered 1913. Produced 1913-1952. Held by Jonathan Gordan for many years (as of 1951). This mine is on the west side of a southeastward-trending gulch, at an altitude of approximately 6,400 feet.

In the ridge at the mine the succession of rocks, from lowest to highest, is exposed: Quartzite, light-colored and fine-grained, of Permian aspect, approximately 60 feet thick; gray shale, in part siliceous or novaculitic, with some impure limestone beds, locally metamorphosed to epidote, garnet, and other silicates (tactite), approximately 40 feet thick; bluish-gray limestone conglomerate and limestone, separated from underlying beds by low-angle fault, approximately 30 feet thick; thin-bedded, dark to brownish shale, in part sandy, caps eastern slope of the ridge. Presumably the conglomaritic limestone and overlying shale are Cretaceous.

The prevailing southeastward dip of the beds is modified by broad, low flexures in the mine. Also, faults which trend N.30ºW. and N.70ºE. have effected relatively small displacements. The side gulch immediately south of the mine apparently marks the location of a fault trending N.65º to 70ºW. and with its northern side downthrown. The main gulch east of the mine presumably marks a fault of northward trend, with its west side downthrown. Granite invades the sedimentary series on the west.

Mineralization is a wedge-shaped ore body hosted in Abrigo Limestone and containing sulfides, iron oxides and helvite in irregular manto-type bodies of pyrometasomatic limy silicates in impure, shaly Abrigo Limestone, where it is cut by faults. Irregular masses of contact silicates replace the impure, shaly limestone beds beneath the conglomeritic limestone.

Workings prior to 1947 included more than 1,000 feet of workings, largely within the Sulphide and Silver connecting adits. Workings are chiefly from adit levels. The Silver adit extends northward and connects with the Sulfide adit which extends west and southward. These two tunnels, together with their drifts and stopes, are distributed through an area approximately 330 feet long by 100 feet wide. In addition, there is the Mistletoe adit with approximately 200 feet of workings, and several shorted adits. Over 17,000 tons of ore were produced since 1913 but mainly during the period 1947 and 1951.

Regions containing this locality

Sonoran Desert, North America

Desert - 1,135 mineral species & varietal names listed

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


23 valid minerals.

Detailed Mineral List:

Anglesite
Formula: PbSO4
Reference: Rolf Luetcke
Beryl
Formula: Be3Al2(Si6O18)
Description: Occurs in garnet tactite.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 133; Shawe, D.R. (1966), AZ-NM-NV-UT beryllium belts, USGS PP 550-C: 206-213.
Calcite
Formula: CaCO3
Reference: Wilson, E.D., et al (1951), Arizona zinc and lead deposits, part II, AZ Bur. Mines Bull. 158: 23
Cerussite
Formula: PbCO3
Reference: Rolf Luetcke
Chalcopyrite
Formula: CuFeS2
Reference: MRDS database Dep. ID file #10161252, MAS ID #0040030205.
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Description: In irregular masses of contact silicates.
Reference: Wilson, E.D., et al (1951), Arizona zinc and lead deposits, part II, AZ Bur. Mines Bull. 158: 21-23.
Fluorite
Formula: CaF2
Reference: rolf luetcke
Galena
Formula: PbS
Reference: Keith, Stanton B. (1973), Arizona Bureau of Geology & Mineral Technology, Geol. Sur. Branch Bull. 187, Index of Mining Properties in Cochise Co., AZ: 69 (Table 4); Wilson, E.D., et al (1951), Arizona zinc and lead deposits, part II, AZ Bur. Mines Bull. 158: 23.
'Garnet Group'
Formula: X3Z2(SiO4)3
Description: Occurs as a component of garnet tactite.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 133; Shawe, D.R. (1966), AZ-NM-NV-UT beryllium belts, USGS PP 550-C: 206-213; Wilson, E.D., et al (1951), Arizona zinc and lead deposits, part II, AZ Bur. Mines Bull. 158: 20-23.
Greenockite
Formula: CdS
Habit: Minute, needle-like
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 239.
Gypsum
Formula: CaSO4 · 2H2O
Reference: Rolf Luetcke
Hedenbergite
Formula: CaFe2+Si2O6
Description: In irregular masses of contact silicates.
Reference: Wilson, E.D., et al (1951), Arizona zinc and lead deposits, part II, AZ Bur. Mines Bull. 158: 23.
Helvine
Formula: Be3Mn2+4(SiO4)3S
Description: Occurs in tactite in a limestone replacement deposit.
Reference: Keith, Stanton B. (1973), Arizona Bureau of Geology & Mineral Technology, Geol. Sur. Branch Bull. 187, Index of Mining Properties in Cochise Co., AZ: 69 (Table 4); Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 245; Trischka, C., et al (1929), Diatomite in Arizona, Engr. Mining Jour.: 127: 13-14; Meeves, H.C. (1966), Nonpegmatite beryllium occurrences in AZ, CO, NM, UT and four adjacent states, US Bur. Mines Rept. Inv. 6828: 56..
Hematite
Formula: Fe2O3
Reference: Wilson, E.D., et al (1951), Arizona zinc and lead deposits, part II, AZ Bur. Mines Bull. 158: 23.
Hemimorphite
Formula: Zn4Si2O7(OH)2 · H2O
Reference: Rolf Luetcke
Hydrozincite
Formula: Zn5(CO3)2(OH)6
Reference: Rolf Luetcke
Opal
Formula: SiO2 · nH2O
Reference: Rolf Luetcke
Powellite
Formula: Ca(MoO4)
Reference: Rolf Luetcke
Pyrite
Formula: FeS2
Reference: Rolf Luetcke
Quartz
Formula: SiO2
Reference: Rolf Luetcke
Quartz var: Chalcedony
Formula: SiO2
Reference: Rolf Luetcke
Serpierite
Formula: Ca(Cu,Zn)4(SO4)2(OH)6 · 3H2O
Habit: Micro-crystals
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 368.
Smithsonite
Formula: ZnCO3
Reference: Mineralogy of Arizona, 3rd.ed.: 133, 374; Trischka, C., et al (1929), Diatomite in Arizona, Engr. Mining Jour.: 127: 13-14.
Sphalerite
Formula: ZnS
Reference: Keith, Stanton B. (1973), Arizona Bureau of Geology & Mineral Technology, Geol. Sur. Branch Bull. 187, Index of Mining Properties in Cochise Co., AZ: 69 (Table 4); Wilson, E.D., et al (1951), Arizona zinc and lead deposits, part II, AZ Bur. Mines Bull. 158: 23.
Wulfenite
Formula: Pb(MoO4)
Reference: Rolf Luetcke

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Chalcopyrite2.CB.10aCuFeS2
Galena2.CD.10PbS
Greenockite2.CB.45CdS
Pyrite2.EB.05aFeS2
Sphalerite2.CB.05aZnS
Group 3 - Halides
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Hematite4.CB.05Fe2O3
Opal4.DA.10SiO2 · nH2O
Quartz4.DA.05SiO2
var: Chalcedony4.DA.05SiO2
Group 5 - Nitrates and Carbonates
'Calcite'5.AB.05CaCO3
'Cerussite'5.AB.15PbCO3
Hydrozincite5.BA.15Zn5(CO3)2(OH)6
Smithsonite5.AB.05ZnCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
'Anglesite'7.AD.35PbSO4
Gypsum7.CD.40CaSO4 · 2H2O
Powellite7.GA.05Ca(MoO4)
Serpierite7.DD.30Ca(Cu,Zn)4(SO4)2(OH)6 · 3H2O
Wulfenite7.GA.05Pb(MoO4)
Group 9 - Silicates
'Beryl'9.CJ.05Be3Al2(Si6O18)
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Hedenbergite9.DA.15CaFe2+Si2O6
Helvine9.FB.10Be3Mn2+4(SiO4)3S
Hemimorphite9.BD.10Zn4Si2O7(OH)2 · H2O
Unclassified Minerals, Rocks, etc.
Garnet Group-X3Z2(SiO4)3

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
Greenockite2.8.7.2CdS
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Cerussite14.1.3.4PbCO3
Smithsonite14.1.1.6ZnCO3
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Hydrozincite16a.4.1.1Zn5(CO3)2(OH)6
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Anglesite28.3.1.3PbSO4
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Gypsum29.6.3.1CaSO4 · 2H2O
Group 31 - HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
(AB)5(XO4)2Zq·xH2O
Serpierite31.6.2.1Ca(Cu,Zn)4(SO4)2(OH)6 · 3H2O
Group 48 - ANHYDROUS MOLYBDATES AND TUNGSTATES
AXO4
Powellite48.1.2.2Ca(MoO4)
Wulfenite48.1.3.1Pb(MoO4)
Group 56 - SOROSILICATES Si2O7 Groups, With Additional O, OH, F and H2O
Si2O7 Groups and O, OH, F, and H2O with cations in [4] coordination
Hemimorphite56.1.2.1Zn4Si2O7(OH)2 · H2O
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Epidote58.2.1a.7{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution
Beryl61.1.1.1Be3Al2(Si6O18)
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Hedenbergite65.1.3a.2CaFe2+Si2O6
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Si Tetrahedral Frameworks - SiO2 with H2O and organics
Opal75.2.1.1SiO2 · nH2O
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework Feldspathoids and related species
Helvine76.2.4.1Be3Mn2+4(SiO4)3S
Unclassified Minerals, Rocks, etc.
'Garnet Group'-X3Z2(SiO4)3
Quartz
var: Chalcedony
-SiO2

List of minerals for each chemical element

HHydrogen
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H GypsumCaSO4 · 2H2O
H HemimorphiteZn4Si2O7(OH)2 · H2O
H HydrozinciteZn5(CO3)2(OH)6
H OpalSiO2 · nH2O
H SerpieriteCa(Cu,Zn)4(SO4)2(OH)6 · 3H2O
BeBeryllium
Be BerylBe3Al2(Si6O18)
Be HelvineBe3Mn42+(SiO4)3S
CCarbon
C CalciteCaCO3
C CerussitePbCO3
C HydrozinciteZn5(CO3)2(OH)6
C SmithsoniteZnCO3
OOxygen
O AnglesitePbSO4
O BerylBe3Al2(Si6O18)
O CalciteCaCO3
O CerussitePbCO3
O Quartz (var: Chalcedony)SiO2
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O Garnet GroupX3Z2(SiO4)3
O GypsumCaSO4 · 2H2O
O HedenbergiteCaFe2+Si2O6
O HelvineBe3Mn42+(SiO4)3S
O HematiteFe2O3
O HemimorphiteZn4Si2O7(OH)2 · H2O
O HydrozinciteZn5(CO3)2(OH)6
O OpalSiO2 · nH2O
O PowelliteCa(MoO4)
O QuartzSiO2
O SerpieriteCa(Cu,Zn)4(SO4)2(OH)6 · 3H2O
O SmithsoniteZnCO3
O WulfenitePb(MoO4)
FFluorine
F FluoriteCaF2
AlAluminium
Al BerylBe3Al2(Si6O18)
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
SiSilicon
Si BerylBe3Al2(Si6O18)
Si Quartz (var: Chalcedony)SiO2
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si Garnet GroupX3Z2(SiO4)3
Si HedenbergiteCaFe2+Si2O6
Si HelvineBe3Mn42+(SiO4)3S
Si HemimorphiteZn4Si2O7(OH)2 · H2O
Si OpalSiO2 · nH2O
Si QuartzSiO2
SSulfur
S AnglesitePbSO4
S ChalcopyriteCuFeS2
S GalenaPbS
S GreenockiteCdS
S GypsumCaSO4 · 2H2O
S HelvineBe3Mn42+(SiO4)3S
S PyriteFeS2
S SerpieriteCa(Cu,Zn)4(SO4)2(OH)6 · 3H2O
S SphaleriteZnS
CaCalcium
Ca CalciteCaCO3
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca FluoriteCaF2
Ca GypsumCaSO4 · 2H2O
Ca HedenbergiteCaFe2+Si2O6
Ca PowelliteCa(MoO4)
Ca SerpieriteCa(Cu,Zn)4(SO4)2(OH)6 · 3H2O
MnManganese
Mn HelvineBe3Mn42+(SiO4)3S
FeIron
Fe ChalcopyriteCuFeS2
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe HedenbergiteCaFe2+Si2O6
Fe HematiteFe2O3
Fe PyriteFeS2
CuCopper
Cu ChalcopyriteCuFeS2
Cu SerpieriteCa(Cu,Zn)4(SO4)2(OH)6 · 3H2O
ZnZinc
Zn HemimorphiteZn4Si2O7(OH)2 · H2O
Zn HydrozinciteZn5(CO3)2(OH)6
Zn SerpieriteCa(Cu,Zn)4(SO4)2(OH)6 · 3H2O
Zn SmithsoniteZnCO3
Zn SphaleriteZnS
MoMolybdenum
Mo PowelliteCa(MoO4)
Mo WulfenitePb(MoO4)
CdCadmium
Cd GreenockiteCdS
PbLead
Pb AnglesitePbSO4
Pb CerussitePbCO3
Pb GalenaPbS
Pb WulfenitePb(MoO4)

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Langhian - Chattian
13.82 - 28.1 Ma



ID: 2848145
Middle Miocene to Oligocene granitic rocks

Age: Cenozoic (13.82 - 28.1 Ma)

Description: Granite to diorite representing solidified magma chambers that were the likely source of overlying and nearby volcanic rocks of map unit Tv. The granitic rocks are typically equigranular and fine- to medium-grained. (14-26 Ma)

Lithology: Major:{granite,granodiorite,diorite}, Minor:{quartz diorite}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Cretaceous
66 - 145 Ma



ID: 3187054
Mesozoic sedimentary rocks

Age: Cretaceous (66 - 145 Ma)

Lithology: Sedimentary rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Miller, C.P. (1913) unpublished notes of the San Juan group (available thru Colorado School of Mines Library): 1.
Trischka, C., et al (1929), Diatomite in Arizona, Engineering and Mining Journal: 127: 13-14.
Voelzel, C.W. (1942) U.S. Bureau of Mines Report file No. 464.2/1518. (on Dragoon Zinc reconnaissance) (unpublished): 8, 11.
Cederstrom, D.J. (1946) Geology of the central Dragoon Mountains, Arizona: Tucson, University of Arizona, Ph.D. dissertation, 93 p.: 88-89.
Cederstrom, D.J. (1946) The structural geology of the Dragoon Mountains, Arizona: American Journal of Science: 244(9): 601-621, 1 sheet, scale 1:31,680.
Wilson, E.D., et al (1951), Arizona zinc and lead deposits, part II, Arizona Bureau of Mines Bull. 158: 20-23.
Burnham, C.W. (1959), Metallogenic provinces of the southwestern US and northern Mexico: New Mexico Bureau of Mines and Mineral Resources Bull. 65: 30.
Warner, L.A., et al (1959), Occurrence of non-pegmatite beryllium in the United States, USGS PP 318: 96.
Cooper, J.R. (1962) Bismuth in the United States, exclusive of Alaska and Hawaii: U.S. Geological Survey Mineral Investigations Resource Map MR-22, 19 p., 1 sheet, scale 1:3,168,000: 4.
Meeves, H.C. (1966), Nonpegmatite beryllium occurrences in AZ, CO, NM, UT and four adjacent states, US Bureau of Mines Report of Investigation 6828: 56.
Shawe, D.R. (1966), AZ-NM-NV-UT beryllium belts, USGS PP 550-C: 206-213.
Keith, Stanton B. (1973), Arizona Bureau of Geology & Mineral Technology, Geol. Sur. Branch Bull. 187, Index of Mining Properties in Cochise Co., AZ: 69 (Table 4).
Sawyer, M.B., Gurmendi, A.C., Daley, M.R., and Howell, S.B. (1992) Principal Deposits of Strategic and Critical Minerals in Arizona, U.S. Bureau of Mines Special Publication, 334 pp.
Chatman, M.L. (1993) U.S. Bureau of Mines Open File Report Mineral Land Assessment (MLA) 30-93: 26-28, D60-D73.
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 133, 239, 245, 368, 374.
MRDS database Dep. ID file #10009832, MRDS ID #D003068; and, Dep. ID #10161252, MAS ID #0040030205.


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