SDSU Geological Sciences - Thesis Defense - Nicholas Godinez

submitted by: tcarrasc
Stratigraphy and petrologic evolution of the Oligocene-Miocene Comondú Group near Bahia Concepcion and Loreto, Baja California Sur, México Nicholas Godinez Advisor Dr. David Kimbrough ABSTRACT The Comondú Group of Baja California Sur, Mexico comprises extensive Oligocene to middle Miocene forearc basin and volcanic arc deposits that formed immediately prior to plate boundary reorganization and rifting that opened the Gulf of California. This study contributes new whole rock X-ray...

SDSU Geological Sciences - Thesis Defense - Esteban Bowles-Martinez

submitted by: tcarrasc
Geophysical imaging of the San Andreas Fault damage zone near Little Rock, California Esteban Bowles-Martinez Advisor Dr. Thomas Rockwell ABSTRACT New gravity, DC resistivity, and seismic refraction data image the damage zone surrounding the San Andreas Fault (SAF) near Little Rock, California. Analysis of these new data shows a decrease in electrical resistivity and seismic velocity in granitoids near the fault, which is interpreted as increased damage, with more damage on the...

SDSU Geological Sciences - Thesis Defense - Carrie Welker

submitted by: tcarrasc
No evidence for seawater-derived crustal contamination at Loihi Seamount from trace metal abundances and oxygen isotope ratios Carrie Welker Advisor Dr. Aaron Pietruszka ABSTRACT Loihi Seamount is the youngest Hawaiian volcano. It towers ~3 km above the seafloor to within ~1 km of sea level. A previous study found elevated (234U/238U) ratios in sixteen Loihi volcanic glass samples. The expected value of (234U/238U) in primary magmas derived from the mantle is 1.000, but seawater's...

SDSU Geological Sciences - Thesis Defense - Daniel Torn

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3D Petrel Geomodeling: Proposal for Redevelopment of a Hydrocarbon Reservoir Daniel Torn Advisor Dr. Gary Girty ABSTRACT Occidental Petroleum Corporation purchased the Black Mamba Oil Field from Vintage Petroleum Inc. in 2005. The Black Mamba Oil Field consists of two lithologically similar oil-producing reservoirs called the Phacodies and Pequena. These two reservoirs have not been redeveloped for over 30 years until recently. Oxy conducted recompletions of various wells in the...

SDSU Geological Sciences - Thesis Defense - William Munson

submitted by: tcarrasc
Investigating compositional variation in Cabrillo Formation conglomerate volcanic clasts, San Diego County, California William Munson Advisor Dr. David Kimbrough ABSTRACT Conglomerate clasts of the Campanian-Maastrichtian Cabrillo Formation, part of the Rosario Group, have been interpreted as locally derived forearc basin detritus shed from the adjacent Peninsular Ranges batholith (PRB) magmatic arc which ranges in age from ~140-85 Ma. Rosario Group sandstone compositions, detrital...

SDSU Geological Sciences - Thesis Defense - Tim Pelbath

submitted by: tcarrasc
Using texture and geochemical data to assess the stratigraphic relationships between the Marcus Wash and Rojo Grande units, Picacho State Recreation Area, SE California Tim Pelbath Advisor Dr. Gary Girty ABSTRACT The Picacho State Recreation Area (PSRA), located in the lower Colorado River region SE California, contains a thick sequence of Tertiary volcanics. Based on published work, Miocene volcanic rocks have been subdivided, from lowest to highest, into the following 6 mappable...

SDSU Geological Sciences - Thesis Defense - Karl Bloor

submitted by: tcarrasc
Indications of a Geothermal Resource West of Santa Fe, New Mexico Karl Bloor Advisors Dr. Shuo Ma and Dr. George Jiracek ABSTRACT New data from the USGS provide indications of a potential geothermal resource west of Santa Fe, New Mexico. The study area is located within the Española Basin, part of the Rio Grande rift, which has calculated heat flow between 72-109 mW/m2. Data from the USGS include temperature gradients, proposed geologic structures and ground water flow models....

SDSU Geological Sciences - Thesis Defense - Erik Gordon

submitted by: tcarrasc
Metamorphic Alteration of the Jurassic Metavolcanic Member, Winterhaven Formation, SE California; Implications for Classification and Interpreting Tectonic Setting Erik Gordon Advisor Dr. Gary Girty ABSTRACT The metavolcanic member of the Winterhaven Formation was erupted in an arc graben depression associated with extension during Jurassic subduction of the ancestral Pacific Plate beneath the California coastline. Analysis of 19 thin sections collected from the metavolcanic member...

SDSU Geological Sciences - Thesis Defense - Brianne Rohrer

submitted by: tcarrasc
Indications of release of constituents into groundwater in San Diego County's South Chollas Landfill Brianne Rohrer Advisor Dr. Kathy Thorbjarnarson ABSTRACT Landfills in San Diego County were not required to be lined until the 1970's, and accepted hazardous waste until the 1990's. South Chollas landfill was designed as an unlined landfill and stopped receiving waste in 1981. The by-products of trash degradation in the South Chollas Landfill produced volatile organic compounds such a...

SDSU Geological Sciences - Thesis Defense - Heather O'Brien

submitted by: tcarrasc
Water Chemistry in Two Multi-Depth Monitoring Wells in San Diego, California: A Comparison of Core Extracted Pore Water Versus Multiple Depth Well Samples Heather O'Brien ABSTRACT In 2001, the United States Geological Survey, in partnership with Sweetwater Authority and the City of San Diego, began a study to assess the geology and hydrology of the San Diego area. In addition to collecting surface water samples, seven multi-depth wells have been installed by USGS into the San Diego...