Search
Now showing items 1-20 of 25
Laramide stress conditions and deformation mechanisms during the formation of Hudson and Dallas Domes, Lander Quadrangle, Wind River Mountains, Lander, Wyoming
(University of Missouri--Columbia, 2008)
of the Wind River Mountains. The study involved geologic mapping of surface deformation, collecting and analyzing fault and fracture orientation data, and deducing the folds deformation geometry, folding mechanisms, and associated stresses. Mapping and well...
Midwestern climate records from tree ring [delta]¹³C and [delta]¹⁸O values
(University of Missouri--Columbia, 2009)
A 504-year tree ring carbon isotopic time series was generated using samples from living and subfossil white oak trees from northern Missouri. Over the interval from 1931-2002 [delta]¹³C is significantly correlated with ...
Petrogenesis and tectonic implications of mafic rocks in the Precambrian core of the Black Hills, South Dakota
(University of Missouri--Columbia, 2007)
, the geologic setting and tectonic events that occurred prior to the collision are still enigmatic. In this investigation major and trace element ICP-OES and INAA data of four suites of amphibolites were used to define at least two distinct tectonic settings...
Structural geology and tectonics of the paleoproterozoic rocks of the Mount Rushmore Quadangle, Black Hills, Souh Dakota
(University of Missouri--Columbia, 2006)
The Paleoproterozoic assembly of Laurentia occurred between ̃1.96 to 1.70 Ga, and continued with the accretion of island arc terranes until about 1.63 Ga. The Black Hills, South Dakota lie along the eastern margin of the ...
Recent faulting and active shortening of the Middle Atlas Mountains, Morocco, within the diffuse African-Eurasian plate boundary
(University of Missouri--Columbia, 2008)
The intracontinental Atlas Mountains of northwest Africa are prominent tectonic elements in the broader, diffuse plate boundary zone between the converging African and Eurasian plates. This study focuses on constraining ...
Dynamic links between short-term deformation and long-term tectonics: a finite element study
(University of Missouri--Columbia, 2009)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] Geodetic and geological data for crustal deformation are significantly different in many places. This discrepancy may indicate different strain rates in the geological past...
Surface and deep water circulation in late Cretaceous North Atlantic greenhouse ocean
(University of Missouri--Columbia, 2009)
This research provides the first of its kind empirical data regarding the evolution of Maastrichtian surface to deep ocean circulation in the North Atlantic. Differences in foraminiferal abundances and oxygen and carbon ...
Earthquake interaction along the Sultandagi-Aksehir fault based on InSar and coulomb stress modeling
(University of Missouri--Columbia, 2008)
The evolution of geologic structures along active faults is influenced by crustal deformation associated with several repetitions of the earthquake cycle, in addition to surficial processes accompanying geologic time. This study focuses...
Fluid inclusion and oxygen isotope studies of high-grade quartz-scheelite veins at the Cantung Mine, Northwest Territories, Canada: products of a late-stage magmatic-hydrothermal event
(University of Missouri--Columbia, 2006)
High-grade quartz-scheelite veins in the Open Pit orebody, Cantung occur 300 m above a limestone-monzogranite contact where the E-Zone orebody, a world-class tungsten skarn, is developed. Adjacent to these veins, alteration ...
Changes in stable carbon isotopes of methane along a salinity gradient in a hypersaline microbial mat system
(University of Missouri--Columbia, 2007)
The purpose of this study was to examine how the stable carbon isotopes of methane and possible methanogenic substrates change in microbial mat communities as a function of salinity. Microbial mats were sampled from four ...
Fault evolution and earthquakes : a finite element study
(University of Missouri--Columbia, 2006)
The New Madrid Seismic Zone (NMSZ) in central United States is a good example of intraplate seismicity, which cannot be readily explained by the plate tectonics theory and remains poorly understood. I have developed a 3D ...
Lithium and lithium isotopes in tourmaline as indicators of crystallization processes: a study of San Diego County pegmatites, California
(University of Missouri--Columbia, 2007)
The pegmatites of San Diego County, California, are part of the Mesozoic Peninsular Ranges Batholith of southwestern California and Baja California, Mexico. Three LCT- pegmatites were studied. The pegmatites have texturally, ...
Igneous intrusions and thermal evolution in the Raton Basin, CO-NM: contact metamorphism and coal-bed methane generation
(University of Missouri--Columbia, 2006)
Tertiary mafic dikes and sills intrude coal-bearing formations of the Raton Basin. This study investigates the role of intrusions in generating methane from coal. Coal samples at four different outcrops were analyzed by ...
GPS measurements of present day crustal deformation within the Lebanese Restraining Bend along the Dead Sea Transform
(University of Missouri--Columbia, 2008)
The Lebanese restraining bend is a 200 km long bend with a left lateral sense of slip located along the Dead Sea fault system (DSFS) between 33.2 and 34.6 degrees north latitude. The DSFS is a transform plate boundary fault ...
Geochemistry and fluid evolution of a carboniferous-hosted sphalerite breccia deposit, Isle of Man
(University of Missouri--Columbia, 2008)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Base-metal sulfide deposits have been mined historically on the Isle of Man, principally from large quartz-vein deposits hosted in Ordovician-Silurian ...
Metamorphism of the Wales Group and Moira Group on Prince of Wales and Dall Islands, southeastern Alaska
(University of Missouri--Columbia, 2007)
proposes conditions near 400[degrees]C at 2-4 kbar to nearly 500-550[degrees]C at 10 kbar. These calculated P-T conditions suggest regional metamorphism for the M2 and M3 events.--From public.pdf....
Effect of plagioclase crystallization on liquid and magma viscosity in the Anorthite-diopside-dorsterite-quartz system
(University of Missouri--Columbia, 2006)
SiO2 (CMAS) glasses were synthesized as analogs for dacitic and basaltic lavas. Liquid viscosities were measured between 101 and 1013 Pa s, over the temperature range of approximately 1600 to 700⁰C, using concentric cylinder ...
Atrazine transport through a glacial till aquifer in north-central Missouri
(University of Missouri--Columbia, 2009)
Although the claypan of North Central Missouri is traditionally believed to protect the groundwater from contamination, low concentrations of the herbicide atrazine have been detected in a shallow glacial till aquifer. The ...
Spatial, temporal, and petrogenetic relationships of basaltic and lamprophyric dikes and sills of the Raton Basin, southern Colorado and northern New Mexico
(University of Missouri--Columbia, 2005)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Alkali basalts and lamprophyres commonly occur as sheet intrusions along the flanks of continental rifts. The Raton Basin, on the eastern shoulder of ...
Seismic tomography and anisotropy : studies of intraplate seismic zones
(University of Missouri--Columbia, 2009)
Both body and surface wave tomography has been applied to some significant intraplate seismic zones to explore the cause of intraplate earthquakes. Pn tomography in the Central and Eastern United States reveals that the ...