Carlisle area of the Steeple Rock mining district, New Mexico

1943 ◽  
Author(s):  
R.L. Griggs ◽  
H.C. Wagner ◽  
Harrison Schmitt
Author(s):  
Jonathan Credo ◽  
Jaclyn Torkelson ◽  
Tommy Rock ◽  
Jani C. Ingram

The geologic profile of the western United States lends itself to naturally elevated levels of arsenic and uranium in groundwater and can be exacerbated by mining enterprises. The Navajo Nation, located in the American Southwest, is the largest contiguous Native American Nation and has over a 100-year legacy of hard rock mining. This study has two objectives, quantify the arsenic and uranium concentrations in water systems in the Arizona and Utah side of the Navajo Nation compared to the New Mexico side and to determine if there are other elements of concern. Between 2014 and 2017, 294 water samples were collected across the Arizona and Utah side of the Navajo Nation and analyzed for 21 elements. Of these, 14 elements had at least one instance of a concentration greater than a national regulatory limit, and six of these (V, Ca, As, Mn, Li, and U) had the highest incidence of exceedances and were of concern to various communities on the Navajo Nation. Our findings are similar to other studies conducted in Arizona and on the Navajo Nation and demonstrate that other elements may be a concern for public health beyond arsenic and uranium.


2019 ◽  
Vol 94 (3) ◽  
pp. 214-239 ◽  
Author(s):  
Philip Simmons
Keyword(s):  

1999 ◽  
Vol 67 (1-3) ◽  
pp. 167-189 ◽  
Author(s):  
Virginia T McLemore ◽  
Erik A Munroe ◽  
Matt T Heizler ◽  
Christopher McKee
Keyword(s):  

2020 ◽  
Vol 58 (1) ◽  
pp. 125-135 ◽  
Author(s):  
Anthony R. Kampf ◽  
Paul M. Adams ◽  
Barbara P. Nash ◽  
Joe Marty ◽  
John M. Hughes

ABSTRACT Okieite, Mg3[V10O28]·28H2O, is a new decavanadate mineral from the Burro mine, Slick Rock district, San Miguel County, Colorado, USA (type locality); the mineral is also found at the Hummer mine, Paradox Valley, Montrose County, also in Colorado. The mineral is rare; it occurs with dickthomssenite on montroseite- and corvusite-bearing sandstone. Crystals of okieite from the Burro mine are equant to prismatic, commonly appearing like curving columns (up to about 3 mm in length) and often exhibiting rounded faces. The streak of okieite is light orange yellow, and the luster is vitreous. The Mohs hardness is ca. 1½, the tenacity is brittle, the fracture is curved or conchoidal, there is no cleavage, and the measured density is 2.20(2) g/cm3. Okieite is biaxial (–), with α = 1.720(3), β = 1.745(3), γ = 1.765(3) (white light); 2V = 84(2)° with strong r < v dispersion. The optical orientation is X ^ a = 37°, Y ^ c = 28°, Z ^ b = 31°. No pleochroism is observed in okieite. The empirical formula from electron-probe microanalysis (calculated on the basis of V = 10 and O = 56 apfu as indicated by the structure) is Mg2.86[H0.28V5+10O28]·28H2O. Okieite is triclinic, , with a 10.55660(19), b 10.7566(2), c 21.3555(15)Å, α 90.015(6), β 97.795(7), γ 104.337(7)°, and V 2326.30(19)Å3, as determined by single-crystal X-ray diffractometry. The strongest four diffraction lines in the powder diffractograms are [d in Å(I)(hkl)]: 9.71(100); 8.32(19); 11.04(17)(002); and 6.42(12)(110, . The atomic arrangement of okieite [R1 = 0.0352 for 11,327 I > 2σI reflections] consists of a {V10O28}6– (decavanadate) structural unit and a {[Mg(H2O)6]3·10H2O}6+ interstitial complex. Only hydrogen bonding links the structural unit with the components of the interstitial complex. Okieite is isostructural with synthetic Mg3[V10O28]·28H2O. The name okieite is for Craig (“Okie”) Howell of Naturita, Colorado.


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