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 have pronounced negative effects on the likelihood of successful in situ leaching of a calcite-rich ore with aqueous SO2. Petrographic and geochemical analyses showed that both Mn (IV, II) oxides and calcite were dissolved. The abundance of dissolved Ca caused precipitation of gypsum. Acid consumption by calcite dissolution caused a rise in pH that caused the S02/S species to shift to SO32- (sulfite), which hindered reductive dissolution of Mn oxide. Gypsum precipitation did not affect complete leaching of the rock fragments in the column tests; however, it plugged the natural permeability in the core. Manganese recoveries were high for the column tests and low for the core test.

From abstract: This report is about six gas samples that were obtained from the Mississippian Leadville Limestone in the McElmo field, Colorado, and the Lisbon field, Utah. These samples were recorded to contain a high reading of carbon dioxide and the report investigates these results.

A study was undertaken to explore relationships between wetland characteristics which make them efficient water purifiers versus their ability to serve as wildlife habitat. The effects of designing constructed wetlands for improved habitat on water treatment efficiencies were quantified. Results indicate that some sacrifice in treatment efficiency is required and that the degree of efficiency reduction is dependant upon pollutant loading rates. However, sacrifice in efficiency is much smaller than increase in habitat quality, and can be offset by increasing wetland area. A practical, theoretical application was then attempted.

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 Wilderness Study Areas refers only to that part of the wilderness study area for which a mineral survey was requested by the U.S. Bureau of Land Management. The study area is located in western Arizona, about 30 mi northwest of Kingman. There are no identified resources in the study area.

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 parcels of land totaling 1,315 acres. The Wabayuma Peak Wilderness Study Area, including the 14 private parcels of land, is herein referred to as the "wilderness study area" or the "study area." The Boriana, Antler, and Copper World mines lie near the east boundary of the study area. The Boriana mine was a major tungsten-producing mine of the United States during World War II. The Antler and Copper World mines produced relatively small amounts of copper and zinc prior to 1970.

The attitudes toward the integration of faith and discipline of full-time faculty members at five selected Southern Baptist colleges and universities which are members of the Christian College Coalition were explored for this study. The integration of faith and discipline is a concept unique to Southern Baptist higher education. Arthur Walker, Jr., of the Education Commission of the Southern Baptist Convention defines the concept as referring to the mission of the institution, the personal faith of faculty members, and the professional involvement and interaction of faculty members with their students, regardless of disciplines. Since little information exists on faculty attitudes toward this concept, data were collected through a survey instrument on three dimensions of integration: professorial integration in the classroom, professorial integration in and out of the classroom, and institutional integration of faith and discipline.

Photograph of a vintage Cadillac propped up on a tow dolly in a desert. A child uses a slide at a spaceship-shaped playground to the left of the automobile. A highway passes by in the background. There are large cacti scattered across the desert. [1992, Arizona]

Photograph of a telephone pole at the bottom of a sandy hill. Trees stand to the left of the telephone pole where dry grass sparsely covers the landscape. [1992, Arizona]

Photograph of a curving road near a cliffside. The road ends at a stop sign and intercedes with a highway. [1992, Arizona]

From abstract: The information presented in this report supplements the geologic map of the Fife Peak quadrangle and supports ongoing investigations of the evolution of the Turkey Creek caldera.

From abstract: Information in this report supplements the geologic map of the Rustler Park quadrangle and supports ongoing investigations of the Turkey Creek caldera.

The following report is a mineral resource assessment of Coronado National Forest of southeastern Arizona and southwestern New Mexico, formed by geologic, geochemical, and geophysical data.

From introduction: This report supplements similar reports prepared for the four 7.5-minute quadrangles that cover the Turkey Creek caldera and geologic map of the caldera.

From abstract: Information in this report supplements the geologic map of the Stanford Canyon quadrangle that provides chemical data, thin sections, and hand specimens for each of the samples collected in the quadrangle.

Letter from Toby Felker to WASP enclosed with a souvenir book from their previous conference.

From introduction: The purpose of this study is to establish a stratigraphic framework of the Bisbee Group in the Tombstone Hills, and to use this stratigraphy to unravel the complex history of folding, faulting, intrusion, and mineralization.

From introduction: This study examines mid-Tertiary mineralization of the area in the context of both detachment and basin-range faulting.

Newspaper clippings of the article, "Council [sc]raps VIA meeting" in the San Antonio Express-News discussing a non-binding resolution passed by the San Antonio City Council urging VIA staffers not to attend a training conference in Tempe, Arizona because of Arizona's vote against a Martin Luther King, Jr. holiday. The article also states the purpose and costs of attending the conference.

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 in west-central Arizona. The U.S. Geological Survey and the U.S. Bureau of Mines conducted geological, geochemical, and geophysical surveys to appraise the identified mineral resources (known) and assess the mineral resource potential (undiscovered) of the study area. Fieldwork for this report was carried out largely in 1986-1989.

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 by resuspension of surface wax and resin components liberated from the leaves of vegetation common to areas of the Grand Canyon. The samples were analyzed using high-resolution gas chromatography/mass spectrometry (GC/MS). Probable identification of compounds was made by comparison of sample spectra with National Institute of Standards and Technology (NIST) mass spectral references and positive identification of compounds was made when possible by comparison with authentic standards as well as NIST references. Using these references, we have been able to positively identify the presence of n-alkane and n-alkanoic acid homolog series in the surface waxes of the vegetation sampled. Several monoterpenes, sesquiterpenes, and diterpenes were identified also as possible biogenic aerosols which may contribute to the total organic aerosol abundance leading to visibility reduction in the …

Photocopy of a newspaper article about Byrd Howell Granger writing a book about WASP members titled 'On Final Approach.' The article also includes information about the author's death, as well as a photograph of Granger writing with a typewriter.

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "MU FS Andre White gets ahold of David Thompson's shirt and forces him out of bounds during second quarter."

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Artist Baje Whitehorne, Flagstaff, Ariz., visits with Debbie and Michael Thomas, from left, at the painting party"

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "University of Arizona's Joseph Blair (50) and Ray Owes (22) battle for a rebound with Oklahoma State's Fred Burley."