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Rabbit Ears Lamproite, Rabbit Ears Pass, Middle Park, Grand Co., Colorado, USA

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Small lamproite pluton exposed in the basalt-rhyolite province near Middle Park, Colorado. The Rabbit Ears Lamproite is Oligocene (33mya) in age and is not diamondiferous.



References:
Thompson, R. N., Velde, D., Leat, P. T., Morrison, M. A., Mitchell, J. G., Dickin, A. P., and Gibson, S. A. (1997). Oligocene lamproite containing an Al-poor, Ti-rich biotite, Middle Park, northwest Coloroado, USA. Mineralogical Magazine 61: 557-572.





 Map Reference: 40°11'20"N , 105°57'19"W

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Mineral List:
  		•  Analcime
    Na
     
    2
    		[Al
     
    2
    		Si
     
    4
    		O
     
    12
    		] · 2H
     
    2
    		O
    Reference: [Thompson, R. N., Velde, D., Leat, P. T., Morrison, M. A., Mitchell, J. G., Dickin, A. P., and Gibson, S. A., 1997. Oligocene lamproite containing an Al-poor, Ti-rich biotite, Middle Park, northwest Coloroado, USA. Mineralogical Magazine 61: 557-572.]
  		•  'Apatite'
    Reference: [Thompson, R. N., Velde, D., Leat, P. T., Morrison, M. A., Mitchell, J. G., Dickin, A. P., and Gibson, S. A., 1997. Oligocene lamproite containing an Al-poor, Ti-rich biotite, Middle Park, northwest Coloroado, USA. Mineralogical Magazine 61: 557-572.]
  		•  Biotite
    Reference: [Thompson, R. N., Velde, D., Leat, P. T., Morrison, M. A., Mitchell, J. G., Dickin, A. P., and Gibson, S. A., 1997. Oligocene lamproite containing an Al-poor, Ti-rich biotite, Middle Park, northwest Coloroado, USA. Mineralogical Magazine 61: 557-572.]
  		•  Diopside
    CaMg[Si
     
    2
    		O
     
    6
    		]
    Reference: [Thompson, R. N., Velde, D., Leat, P. T., Morrison, M. A., Mitchell, J. G., Dickin, A. P., and Gibson, S. A., 1997. Oligocene lamproite containing an Al-poor, Ti-rich biotite, Middle Park, northwest Coloroado, USA. Mineralogical Magazine 61: 557-572.]
  		•  Ilmenite
    Fe
    2+
     
    		TiO
     
    3
    Reference: [Thompson, R. N., Velde, D., Leat, P. T., Morrison, M. A., Mitchell, J. G., Dickin, A. P., and Gibson, S. A., 1997. Oligocene lamproite containing an Al-poor, Ti-rich biotite, Middle Park, northwest Coloroado, USA. Mineralogical Magazine 61: 557-572.]
  		•  Phlogopite
    KMg
     
    3
    		[(OH,F)
     
    2
    		|AlSi
     
    3
    		O
     
    10
    		]
    Reference: [Thompson, R. N., Velde, D., Leat, P. T., Morrison, M. A., Mitchell, J. G., Dickin, A. P., and Gibson, S. A., 1997. Oligocene lamproite containing an Al-poor, Ti-rich biotite, Middle Park, northwest Coloroado, USA. Mineralogical Magazine 61: 557-572.]
  		•  Richterite
    Na[CaNa][Mg
     
    5
    		][(OH)
     
    2
    		|Si
     
    8
    		O
     
    22
    		]
    Reference: [Thompson, R. N., Velde, D., Leat, P. T., Morrison, M. A., Mitchell, J. G., Dickin, A. P., and Gibson, S. A., 1997. Oligocene lamproite containing an Al-poor, Ti-rich biotite, Middle Park, northwest Coloroado, USA. Mineralogical Magazine 61: 557-572.]


    7 entries listed. 5 valid minerals.

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