Some Hard Rock Constraints on the Supply of Heat to Mid-Ocean Ridges

2013 ◽  
pp. 111-149 ◽  
Author(s):  
Mathilde Cannat ◽  
Joe Cann ◽  
John Maclennan
Keyword(s):  
Hard Rock ◽  
Ocean Ridges

GEOCHEMICAL MODELING OF HARD-ROCK MINE DRAINAGE AND MINE-IMPACTED WATERS

2019 ◽  
Author(s):  
Kate M. Campbell ◽  
◽  
Charles N. Alpers ◽  
Christy L. Grettenberger ◽  
Thomas N Wallis ◽  
...  
Keyword(s):  
Hard Rock ◽  
Mine Drainage ◽  
Geochemical Modeling

scholarly journals Quantification of Elemental Contaminants in Unregulated Water across Western Navajo Nation

2019 ◽  
Vol 16 (15) ◽  
pp. 2727 ◽  
Author(s):  
Jonathan Credo ◽  
Jaclyn Torkelson ◽  
Tommy Rock ◽  
Jani C. Ingram
Keyword(s):  
Native American ◽  
New Mexico ◽  
Hard Rock ◽  
Water Systems ◽  
American Southwest ◽  
Western United States ◽  
Navajo Nation ◽  
Hard Rock Mining ◽  
Rock Mining ◽  
American Nation

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.

scholarly journals Research on the Mechanical Properties of Hard Rock

2018 ◽  
Vol 417 ◽  
pp. 012003
Author(s):  
Longyun Zhang ◽  
Shucai Li ◽  
Shangyang Yang ◽  
Qiangyong Zhang
Keyword(s):  
Mechanical Properties ◽  
Hard Rock
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