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Manhattan Mine, Knoxville, Napa Co., California, USA

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A former Hg mine located in sec. 6, T11N, R4W, and in sec. 1, T11N, R5W, MDM, 1 mile NW of the Knoxville Mine.

Mineralization is a hydrothermal vein deposit. Then ore zone is 1 mile long and several hundred yards wide. The ore occurs as irregular veins of cinnabar filling joint cracks in Tertiary olivine basalt and is disseminated in the rocks adjoining the veins.



References:
Dana, E.S. (1892) System of Mineralogy, 6th. Edition, New York: 1095-1096.

Bradley, W.W. (1918), Quicksilver resources of California, with a section on metallurgy and ore dressing: California Mining Bureau. Bulletin 78: 86.

Rocks & Minerals (1947): 22: 615.

Bailey, Edgar H. (1959), Froth veins, formed by immiscible hydrothermal fluids, in mercury deposits, California: Geological Society of America Bulletin 70: 661-664.

Davis, F.F. and E.H. Bailey (1966) Mercury. California Division Mines and Geol. Bulletin 191.

Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 232, 304, 350.

Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 111 (map 3-7), 118, 119 (map 3-9), 130, 137, 185, 216, 263, 347.





 Map Reference: 38°50'17"N , 122°21'50"W

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Mineral List:
  		•  Alunogen
    Al
     
    2
    		(SO
     
    4
    		)
     
    3
    		·17H
     
    2
    		O
    Colour: Yellow-white
    Description: Occurs as micro-crystals on melanterite.
    Reference: [Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 263.]
  		•  Aragonite
    CaCO
     
    3
    Habit: Needle-like
    Reference: [Bailey, Edgar H. (1959), Froth veins, formed by immiscible hydrothermal fluids, in mercury deposits, California: Geological Society of America Bulletin 70: 661-664; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 216, 347.]
  		•  'Chalcedony'
    Description: Occurs as "frothy" veins with associated mineral crystals.
    Reference: [Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 347.]
  		•  Cinnabar
    HgS
    Reference: [Bradley, W.W. (1918), Quicksilver resources of California, with a section on metallurgy and ore dressing: California Mining Bureau. Bulletin 78: 86; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 232, 304, 350; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 118.]
  		•  Jamesonite
    Pb
     
    4
    		FeSb
     
    6
    		S
     
    14
    Description: Occurs as delicate capillary crystals "feather ore" associated with cinnabar.
    Reference: [Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 232; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 137.]
  		•  Melanterite
    FeSO
     
    4
    		·7H
     
    2
    		O
    Reference: [Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 263.]
  		•  Pyrite
    FeS
     
    2
    Reference: [Dana 6: 1095-1096.]
  		•  Pyrolusite
    MnO
     
    2
    Description: Occurs as radiating concentric masses with cinnabar.
    Reference: [Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 304.]
  		•  Quartz
    SiO
     
    2
    Reference: [Bailey, Edgar H. (1959), Froth veins, formed by immiscible hydrothermal fluids, in mercury deposits, California: Geological Society of America Bulletin 70: 661-664; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 216, 347.]
  		•  Quartz
    var: Chert
    Reference: [Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 185.]
  		•  Sénarmontite
    Sb
     
    2
    		O
     
    3
    Habit: Octahedral
    Description: Occurs as micro-octahedra in vugs and fissures of chert.
    Reference: [Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 185.]
  		•  Stibnite
    Sb
     
    2
    		S
     
    3
    Description: Occurs as fibrous bands with cinnabar.
    Reference: [Bradley, W.W. (1918), Quicksilver resources of California, with a section on metallurgy and ore dressing: California Mining Bureau. Bulletin 78: 86; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 350; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 130.]


    12 entries listed. 10 valid minerals.

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