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Showing 1 to 20 of 20 for “"Guaymas Basin"”.
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Chemistry of submarine hydrothermal solutions at 21 Ìnorth, East Pacific Rise and Guaymas Basin, Gulf of California
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric and Planetary Sciences, 1984.
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From Continental Margins to the Deep Ocean
… the Peruvian Margin (continental margin), the Guaymas Basin (semi-restricted), and Pacific Gyres (oxic pelagic, ~90 Myr). Proxies such as iron speciation, Mo and U concentrations, and isotopes (δ98Mo, δ15N) were used to reconstruct redox conditions and assess proxy reliability. Results show …
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Evolution of oceanic margins : rifting in the Gulf of California and sediment diapirism and mantle hydration during subduction
… images of a ~2-km-thick evaporite body in Guaymas Basin, central Gulf of California. In rifts, evaporites form under conditions unique to the latest stages of continental rupture, and the presence, age, thickness, and shape place new constraints on the history of early rifting there. …
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Evolution of oceanic margins : rifting in the Gulf of California and sediment diapirism and mantle hydration during subduction
… images of a ~2-km-thick evaporite body in Guaymas Basin, central Gulf of California. In rifts, evaporites form under conditions unique to the latest stages of continental rupture, and the presence, age, thickness, and shape place new constraints on the history of early rifting there. …
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Seismic constraints on the processes and consequences of secondary igneous evolution of Pacific oceanic lithosphere
… Analysis of seismic observations from Guaymas Basin, in the Gulf of California, endeavor to advance our understanding of sill-driven alteration of sediments, an important consequence of secondary magmatism. We show that seismically imaged physical disruption to sediments due to igneous …
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Geochemistry of deep-sea hydrothermal vent fluids from the Mid-Cayman Rise, Caribbean Sea
… vents. Areas studied include the eastern Manus Basin and Lau Basin back-arc spreading centers, the unsedimented basalt-hosted Southern East Pacific Rise, and the sediment-hosted Guaymas Basin mid-ocean ridge spreading centers.
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Seismic constraints on the processes and consequences of secondary igneous evolution of Pacific oceanic lithosphere
… Analysis of seismic observations from Guaymas Basin, in the Gulf of California, endeavor to advance our understanding of sill-driven alteration of sediments, an important consequence of secondary magmatism. We show that seismically imaged physical disruption to sediments due to igneous …
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Fluid flow and sound generation at hydrothermal vent fields
… calculations applied to obtain these values. In Guaymas Basin, a twelve day time series of temperature data was collected from a point three centimeters above a diffuse hydrothermal flow area. Using concurrent tidal gauge data from the town of Guaymas it is shown that the effects of tidar …
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Assessment of flagellate diversity at deep-sea hydrothermal vents using the combined approach of culture-dependent and culture-independent methods
… the Eastern Pacific Ocean: Juan de Fuca Ridge, Guaymas Basin, and both 21°N and 9°N on the East Pacific Rise (EPR). The hydrothermal vent flagellates belonged to six different taxonomic orders: the Ancyromonadida, Bicosoecida, Cercomonadida, Choanoflagellida, Chrysomonadida, and Kinetoplastida. …
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The impact of metals and other stress factors on microbial ammonia oxidation physiology and isotope effects
… related environmental chemistry in the Northern Guaymas hydrothermal vent basin in the Gulf of California. This region hosts a unique juxtaposition of hydrothermal vent emissions enriched in NH4+ underlying an extensive regional oxygen deficient zone (ODZ). Most environmental studies of …
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Perceive, predict, and plan: robotic expeditionary science in oceanic spatiotemporal fields
… with AUV Sentry during field trials in the Guaymas Basin, Gulf of California are interwoven with algorithmic analyses, demonstrating how intelligent perception, prediction, and planning enables novel insights about hydrothermal plumes.
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Characterization of microbial primary and secondary metabolism in the marine realm
… along the oxycline water column of the Cariaco Basin, Venezuela, revealed that differences in water column redox potential were associated with microbial lifestyle and the predicted composition and production of secondary metabolites. This experience set the stage for my third chapter, in which …
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Developing in situ instrumentation to monitor anthropogenic change
… different hydrothermal features at 2000 m in Guaymas Basin, becoming one of the first DIC instruments field-tested at depth. Chapter 5 introduces impedance spectroscopy for quantifying microplastics directly in water. Microplastics were successfully counted, sized, and differentiated from …
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Detrital zircon geochronology of the Upper Miocene Boleo Formation in the Santa Rosalia, Baja California Sur, Mexico
The Santa Rosalía Basin (SRB), Baja California Sur, is a transtentional to rift basin that formed during the opening of the Gulf of California. The Boleo Formation is the oldest and dominant sedimentary fill of the SRB, but its age is poorly constrained. We carried out a U-Pb detrital zircon study …
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Seasonal and Annual Variability In Elemental and Isotopic Proxies of Past Ocean Conditions: Results From the Guaymas and Cariaco Basins
… collected in time series sediment traps from the Guaymas Basin in the Gulf of California and the Cariaco Basin, Venezuela. In Cariaco Basin, the highest flux of planktonic foraminifera occurs during spring upwelling. In response to decreasing upwelling strength and increasing temperatures, the …
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Perceive, Predict, and Plan: Robotic Expeditionary Science in Oceanic Spatiotemporal Fields
… with AUV Sentry during field trials in the Guaymas Basin, Gulf of California are interwoven with algorithmic analyses, demonstrating how intelligent perception, prediction, and planning enables novel insights about hydrothermal plumes.
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Characterization of Microbial Primary and Secondary Metabolism in the Marine Realm
… along the oxycline water column of the Cariaco Basin, Venezuela, revealed that differences in water column redox potential were associated with microbial lifestyle and the predicted composition and production of secondary metabolites. This experience set the stage for my third chapter, in which …
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Developing In Situ Instrumentation to Monitor Anthropogenic Change
… different hydrothermal features at 2000 m in Guaymas Basin, becoming one of the first DIC instruments field-tested at depth. Chapter 5 introduces impedance spectroscopy for quantifying microplastics directly in water. Microplastics were successfully counted, sized, and differentiated from …
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Geochemistry of deep-sea hydrothermal vent fluids from the Mid-Cayman Rise, Caribbean Sea
… vents. Areas studied include the eastern Manus Basin and Lau Basin back-arc spreading centers, the unsedimented basalt-hosted Southern East Pacific Rise, and the sediment-hosted Guaymas Basin mid-ocean ridge spreading centers. Limited isotope fractionation between fluid H2S and precipitating …
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Chemosynthetic communities in the deep sea : ecological studies
… species varies from one site to another. On a basin-wide scale, the fauna of vent communities represent biological continua, where gradual morphological and genetic differentiation in species is correlated with increasing distance between vent sites. Differentiation of distinctive faunals …