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Carbonaceous Aerosol Particles From Common Vegetation in the Grand Canyon

Description: The problem of visibility reduction in the Grand Canyon due to fine organic aerosol particles in the atmosphere has become an area of increased environmental concern. Aerosol particles can be derived from many emission sources. In this report, we focus on identifying organic aerosols derived from common vegetation in the Grand Canyon. These aerosols are expected to be significant contributors to the total atmospheric organic aerosol content. Aerosol samples from living vegetation were collected… more
Date: May 1992
Creator: Hallock, K. A.; Mazurek, M. A. & Cass, G. R.
Item Type: Refine your search to only Report
Location: None
Partner: UNT Libraries Government Documents Department
open access

Mineral Resources of the Black Mountains North and Burns Spring Wilderness Study Areas, Mohave County, Arizona

Description: From abstract: At the request of the U.S. Bureau of Land Management, approximately 19,300 acres of the Black Mountains North Wilderness Study Area (AZ-020-009) and 23,310 acres of the Burns Spring Wilderness Study Area (AZ-020-010) were evaluated for mineral resources and mineral resource potential. In this report, the area studied is referred to, collectively or individually, as the 'wilderness study area' or simply 'the study area'; any reference to the Black Mountains North or Burns Spring W… more
Date: 1990
Creator: Conrad, James E.; Hill, Randall H.; Jachens, Robert C. & Neubert, John T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Mineral Resources of the Warm Springs Wilderness Study Area, Mohave County, Arizona

Description: From abstract: At the request of the U.S. Bureau of Land Management, approximately 113,500 acres of the Warm Springs Wilderness Study Area (AZ-020-028/029) were evaluated for mineral resources and mineral resource potential. In this report, the area studied is referred to as the "wilderness study area" or "study area"; any reference to the Warm Springs Wilderness Study Area refers only to that part of the wilderness study area for which a mineral survey was requested. This study area is located… more
Date: 1990
Creator: Gray, Floyd; Jachens, Robert C.; Miller, Robert J.; Turner, Robert L.; Knepper, Daniel H., Jr.; Pitkin, James A. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Mineral Resources of the Wabayuma Peak Wilderness Study Area, Mohave County, Arizona

Description: From abstract: The Wabayuma Peak Wilderness Study Area (AZ-020-037/043), for which a mineral survey was requested by the U.S. Bureau of Land Management, encompasses 40,118 acres in northwestern Arizona. Fieldwork was carried out in 1986-88 by the U.S. Bureau of Mines and the U.S. Geological Survey to appraise the identified (known) resources and assess the mineral resource potential (undiscovered) of the wilderness study area. Within the Wabayuma Peak Wilderness Study Area are 14 private parcel… more
Date: 1990
Creator: Conway, Clay M.; Hassemer, Jerry R.; Knepper, Daniel H., Jr.; Pitkin, James A.; Jachens, Robert C. & Chatman, Mark L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Petrographic and Geochemical Analyses of Leach Samples from Artillery Peak, Mohave County, Arizona

Description: Abstract: The first step in determining whether Mn can be recovered by in situ leaching is to develop and test a selective lixiviant. Two column leach tests and one core leach test were conducted by the U.S. Bureau of Mines on Mn oxide ore using aqueous sulfur dioxide (SO2) as the lixiviant. The column tests showed that aqueous SO2 could selectively dissolve available Mn oxides from calcite-rich ore in a heap leach system. However, the core test showed that calcite gangue side reactions can hav… more
Date: 1995
Creator: Brink, Susan E.; Blake, Rolland & Marozas, Dianne
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department

Oral History Interview with Odie Mitchell, October 18,1993

Description: Interview with Odie Mitchell concerning his experiences before, during, and after his employment in the Civilian Conservation Corps during the Great Depression. Mitchell worked at camps in Flagstaff, Arizona and Kingman, Arizona.
Access: Restricted to UNT Community Members. Login required if off-campus.
Date: October 18, 1993
Creator: Early, Brice & Mitchell, Odie
Item Type: Refine your search to only Text
Partner: UNT Oral History Program
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