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Preliminary Geologic Map of the North Half of the Union Pass Quadrangle, Mohave County, Arizona
No full textPreliminary Geologic Map of the North Half of the Union Pass Quadrangle, Mohave County, Arizona. Includes one map sheet with cross section at 1:24,000 map scale.On 1/17/2014, F.L. Hillemeyer's name was removed from the author list per his request. (The request was forwarded to AZGS by J.E. Faulds.)Documents in the AZGS Document Repository collection are made available by the Arizona Geological Survey (AZGS) and the University Libraries at the University of Arizona. For more information about items in this collection, please contact [email protected]
Synthesis and reactivity of copper(I) phosphine-alkene complexes: X-ray crystal structure of CuCl(Ph2PCPh=CH2)(2)
No full textCopper(I) chloride complexes containing bifunctional phosphine/alkene ligands of the form CuCl(Ph2PCH=CH2)(n) (n = 1, 3) and CuCl( Ph2PCPh=CH2)(2) have been synthesized, with the latter being characterized by single crystal X-ray diffraction. Complexes decompose rapidly on reaction with hydroborating agents NaBH4 and Na[B(OMe)(3)H], although the thermally unstable Cu(BH4) (Ph2PCPh=CH2)(2) may be observed by NMR spectroscopy. The complexes show considerable resistance to thermally initiated alkene polymerization, the only significant reactivity for diphenylvinylphosphine complexes being trace ligand dissociation and subsequent aerobic oxidation to Ph2P(O)CH=CH2. Similar dissociation/oxidation is not observed for CuCl(Ph2PCPh=CH2)(2). Lewis acid initiated polymerization, using Et2O . BF3, results in the facile formation of copper(I) coordinated polymeric phosphine ligands for diphenylvinylphosphine complexes, but again no reactivity is induced in the more sterically hindered alpha-styrenyl analogue
South Virgin-White Hills detachment fault system of SE Nevada and NW Arizona: Applying apatite fission track thermochronology to constrain the tectonic evolution of a major continental detachment fault
No full textThe South Virgin-White Hills detachment (SVWHD) in the central Basin and Range province with an along-strike extent of similar to 60 km is a major continental detachment fault system. Displacement on the SVWHD decreases north to south from similar to 17 to <6 km. This is accompanied by a change in fault and footwall rock type from mylonite overprinted by cataclasite to chlorite cataclasite and then fault breccia reflecting decreasing fault displacement and footwall exhumation. Apatite fission track (AFT) thermochronology was applied both along-strike and across-strike to assess this displacement gradient. The overall thermal history reflects Laramide cooling (similar to 75 Ma) and then rapid cooling beginning in the late early Miocene. Age patterns reflect some complexity but extension along the SVWHD appears synchronous with rapid cooling initiated at similar to 17 Ma due to tectonic exhumation. Slip rate is more rapid (similar to 8.6 km/Ma) in the north compared to similar to 1 km/Ma in the south. The displacement gradient results from penecontemporaneous along-strike motion and formation of the SVWHD by linkage of originally separate fault segments that have differential displacements and hence differential slip rates. East west transverse structures likely play a role in linkage of different fault segments. The preextension paleogeothermal gradient is well constrained in the Gold Butte block as 18-20 degrees C/km. We present a new thermochronologic approach to constrain fault dip during slip, treating the vertical exhumation rate and the slip as vectors, with the angle between them used to constrain fault dip during slip through the closure temperature of a particular thermochronometer. AFT data from the western rim of the Colorado Plateau. Citation: Fitzgerald, P. G., E. M. Duebendorfer, J. E. Faulds, and P. O'Sullivan (2009), South Virgin-White Hills detachment fault system of SE Nevada and NW Arizona: Applying apatite fission track thermochronology to constrain the tectonic evolution of a major continental detachment fault, Tectonics, 28, TC2001, doi:10.1029/2007TC002194
Overcoming Geographical Obstacles: The Use Of Skype In A Graduate-Level Social Media And Marketing Course
No full textThis paper presents the results of a three-year research and teaching effort that focused on measuring the perceived effectiveness of Skype as a delivery platform for presentations made to students enrolled in a Professional MBA program by nationally acclaimed authors working in the area of social media. The research also investigated the authors ’ acceptance of Skype as a platform for delivering remote presentations to college audiences. The results indicated that both students and authors strongly supported the use of Skype as a presentation platform. The author presentations greatly enhanced the learning environment and contributed to achieving several specific course objectives
Mary Benson : the problem of defining the "self".
No full textThesis (M.A.)-University of Natal, Durban, 1991.This study investigates the problem of defining Mary Benson as a person and a writer.
Her writing spans a range of generic classifications - biography, history, plays, a novel
and an autobiography. Yet, all are centred on her preoccupation with the struggle for
freedom in South Africa. All reveal, moreover, a great deal about Benson's own
values and commitment, prompting us to question the validity, in her case, of such
strict generic categories as useful defining properties in her literary career. Starting
with her most recent publication, the autobiography A Far Cry. I shall look at the way
she presents herself in a traditionally introspective genre. It soon becomes apparent
that Benson views herself within a perspective of South African social reality, and that
her sense of self is inextricably linked to her political involvement. Her personal
needs and desires, to a large extent, remain unobtrusive as she foregrounds her public
interactions and her concern with humanitarian and racial issues. A study of Benson,
therefore, needs to address a selection of her work in an attempt to fully appreciate
her sense of her own identity. In consequence, I go on to discuss her biography
Nelson Mandela and her novel At the Still Point. .Both works confirm the portrait in
A Far Cry of Benson as a responsible South African who has selflessly and
consistently devoted herself to her role as a witness of racial oppression in South
Africa. In her biography, Nelson Mandela, for example, the ANC leader emerges as
an exemplary figure in the public world while his values and ideals are allowed to
parallel Benson's own 'autobiographical' ideals. In At the Still Point, Anne Dawson,
Benson's fictional protagonist, I shall argue, gives her author the opportunity to
express her own feelings about private life in relation to sociopolitical action. These
'personal ' feelings seem to be avoided in the more direct opportunities of the
autobiographical form. In exploring Benson's sense of self, therefore, this study
suggests that for Benson 'commitment' overrides her sense of herself as a literary
figure, and that this has consequences for the weight we give to content and form in
the reading of her work. My conclusion is that we are looking not so much at the
challenges of genre as at a large autobiographical project, in which the 'self is defined
substantially in its meetings with other people in political circumstance
Structural controls of the geothermal system at Gerlach, Washoe County, Nevada
No full textDetailed geologic mapping, spring and two-meter temperature data, and gravity and magnetic data constrain the structural controls of the high-temperature (>175°C) geothermal system at Gerlach. The system lies along the termination of a major normal fault at the southern end of the Granite Range in the southern Black Rock Desert, a known favorable setting for geothermal activity. Mapping of Quaternary deposits documents Holocene movement on the north-northeast-striking, east-dipping Gerlach fault. Dominant orientations of geothermal veins in exposed fossil geothermal systems parallel this active, terminating range-front fault, suggesting that it does provide a major control on the current geothermal system.Locally, there are two areas of geothermal upwelling with separate sets of structural controls. The two areas are expressed by outflow as two sets of springs, Great Boiling Springs and Mud Springs, as well as by separate altered bedrock fossil systems above the springs. The areas are topographically distinct (neither could represent outflow from the other), are separated by relatively lower shallow temperature measurements, and are associated with different orientations of the gravity gradient. Prominent northwest-striking fractures provide areas of enhanced permeability and parallel the secondary set of veins in the altered bedrock uphill of Great Boiling Springs. These northwest-striking veins are not observed in the area above Mud Springs, but there is an east-northeast-striking set that is not present above Great Boiling Springs. The presence of east-northeast-striking structures is supported in the gravity data. These structures could represent an ever broader-scale structural connection between the southern termination of the Gerlach fault and the northern termination of the Fox Range fault to the south
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