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Colorado Mineral Belt

DeVoto, R.H., 1990, Paleozoic stratigraphy, tectonism, thermal history, and basin evolution of central Colorado, in Economic Geology Monograph Number 7 Carbonate-hosted sulfide deposits of the central Colorado mineral belt, D.W. Beaty, G.P. Landis, and T.B. Thompson, eds., Harwood Academic Publishers, Chur, Switzerland, pp. 29-44. [Pg.122]

The effects of these modification mechanisms will obviously increase with sample age and with lithophile element content. Previous studies have shown that the postentrapment production of He and " He within sulfides (pyrite, sphalerite and galena) is insignificant when compared to the measured values. Thrower (1999) studied sulfides from deposits of the Colorado mineral belt (60-15 Ma) and determined post-entrapment isotope production to be <0.6% in all cases which was well below the error for each measurement, making corrections unnecessary. However, in studies of older deposits or... [Pg.600]

Pb-Zn deposit, Colorado mineral belt (Thrower 1999). Early stage samples formed from a magmatic fluid with He/ He of 4.1 Ra and ASW ( Ar/ °Ar = 0.0034). Continued addition of a crustal component during deposition further lowered the He/ He to... [Pg.607]

Figure 36. Br/Cl vs. I/Cl quartz and barite vein data for replacement Pb-Zn deposits of the Colorado mineral belt (Thrower 1999). The data are compatible with mixing between a mantle component similar in composition to fluids in diamond, and a crastal component with higher Br/Cl and I/Cl values. Note that Black Cloud deposit quartz and barite are co-genetic with sulfide samples shown in Figure 5. Shaded area labeled mantle defined by the range determined for fluids in diamonds (Burgess et al. 2002). Figure 36. Br/Cl vs. I/Cl quartz and barite vein data for replacement Pb-Zn deposits of the Colorado mineral belt (Thrower 1999). The data are compatible with mixing between a mantle component similar in composition to fluids in diamond, and a crastal component with higher Br/Cl and I/Cl values. Note that Black Cloud deposit quartz and barite are co-genetic with sulfide samples shown in Figure 5. Shaded area labeled mantle defined by the range determined for fluids in diamonds (Burgess et al. 2002).
Thrower CD (1999) The evolution of mineralizing fluids in the Colorado mineral belt, defined by combined noble gas and halogen analyses. PhD dissertation, University of Manchester, Manchester, UK... [Pg.613]

BONORINO (F.G.), 1959. Hydrothermal alteration in the Front Range mineral belt, Colorado. Bull. Geol. Soc. Arne., 7Q, 53-90. [Pg.189]

Figure 1. Activity diagram of jarosite-alunite-potassium feldspar-gibbsite-goethite system at 1 bar and 298 K. Modified from Bladh (18). Tailings pore water from Grants Mineral Belt, New Mexico and Maybell, Colorado are denoted by O and, respectively. Median ground water composition (19) is represented by. ... Figure 1. Activity diagram of jarosite-alunite-potassium feldspar-gibbsite-goethite system at 1 bar and 298 K. Modified from Bladh (18). Tailings pore water from Grants Mineral Belt, New Mexico and Maybell, Colorado are denoted by O and, respectively. Median ground water composition (19) is represented by. ...
Motica J. E. Geology and uranium-vanadium deposits in the Uravan mineral belt. Southwestern Colorado. In Ore deposits of the United States 1933-1967 Ridge J. D. ed. (New York AIME. 1968), 805-13. [Pg.100]

See other pages where Colorado Mineral Belt is mentioned: [Pg.449]    [Pg.453]    [Pg.109]    [Pg.606]    [Pg.607]    [Pg.331]    [Pg.335]    [Pg.449]    [Pg.453]    [Pg.109]    [Pg.606]    [Pg.607]    [Pg.331]    [Pg.335]    [Pg.155]    [Pg.126]    [Pg.239]    [Pg.239]    [Pg.5]   
See also in sourсe #XX -- [ Pg.107 , Pg.108 , Pg.109 , Pg.110 , Pg.111 , Pg.112 , Pg.113 , Pg.114 , Pg.115 , Pg.116 , Pg.117 , Pg.118 , Pg.119 , Pg.120 , Pg.121 ]



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