Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 143 for “"Vents"”.
-
Diffuse flow from hydrothermal vents
… from a collection of diffuse hydrothennal vents was modelled to determine the fate of this source of flow under typical environmental conditions at seafloor spreading centers. A laboratory simulation was conducted to test an analytic model of diffuse plume rise. The results showed that …
-
Reproductive ecology of Vestimentifera (Polychaeta: Siboglinidae) from hydrothermal vents and cold seeps
… communities, including hydrothermal vents and cold seeps. Species of siboglinids are community dominants, primary colonists of new vent sites, and the longest living and fastest growing marine invertebrates. Their mechanisms of propagation, dispersal and genetic exchange have been …
-
Analysis of the sulfur system in waters from the Galapagos Ridge hydrothermal vents
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Science, 1979.
-
Reproductive traits of pioneer gastropod species colonizing deep-sea hydrothermal vents after an eruption
… the early succession of nascent hydrothermal vents. The reproductive ecology of pioneer species at deep-sea hydrothermal vents may provide insight into their dispersal, population connectivity, and ability to colonize after disturbance. An opportunity to study the reproductive traits of two …
-
Reproductive traits of pioneer gastropod species colonizing deep-see hydrothermal vents after an eruption
… the early succession of nascent hydrothermal vents. The reproductive ecology of pioneer species at deep-sea hydrothermal vents may provide insight into their dispersal, population connectivity, and ability to colonize after disturbance. An opportunity to study the reproductive traits of two …
-
An investigation into the characteristics and sources of light emission at deep-sea hydrothermal vents
… to image ambient light from high-temperature vents at 9°N East Pacific Rise and the Juan de Fuca Ridge during 1997 and 1998 Alvin dive cruises. ALISS is a low-light digital camera with custom-designed optics. A set of nine lenses, each covered by an individual bandpass filter (50 and 100 nm …
-
Influence of hydrodynamics on the larval supply to hydrothermal vents on the East Pacific Rise
… vent gastropod larvae to two hydrothermal vents, 1.6 km apart on the East Pacific Rise, were quantified concurrently with current velocity observations. The magnitude and temporal pattern of larval supply differed between vent sites, despite their close proximity. A strong correlation …
-
Influence of hydrodynamics on the larval supply to hydrothermal vents on the East Pacific Rise
… vent gastropod larvae to two hydrothermal vents, 1.6 km apart on the East Pacific Rise, were quantified concurrently with current velocity observations. The magnitude and temporal pattern of larval supply differed between vent sites, despite their close proximity. A strong correlation …
-
An investigation into the characteristics and sources of light emission at deep-sea hydrothermal vents
… to image ambient light from high-temperature vents at 9°N East Pacific Rise and the Juan de Fuca Ridge during 1997 and 1998 Alvin dive cruises. ALISS is a low-light digital camera with custom-designed optics. A set of nine lenses, each covered by an individual bandpass filter (50 and 100 nm …
-
Diversity of meiofauna at deep-sea hydrothermal vents and cold seeps with particular reference to nematodes
Deep-sea hydrothermal vents and cold seeps are remarkable for their spectacular megaand<br/>macrofauna, many of which appear to have a high level of endemism to these chemosynthetic<br/>environments. It is not clear whether the patterns of biodiversity, faunal zonation<br/>and biogeography …
-
Multibeam echosounding as a tool for mapping geologic features, bathymetry and modern vents, Yellowstone National Park, Wyoming
… been shaped by at least four separate volcanic events. These include tuff, rhyolitic and pyroclastic flows that have altered the hydrothermal plumbing of the lake bed. Using this data, a timeline for the evolution of Lewis Lake has been constructed that allows the geology of the lake floor to be …
-
Spatial and temporal population genetics at deep-sea hydrothermal vents along the East Pacific Rise and Galápagos Rift
Ecological processes at deep-sea hydrothermal vents on fast-spreading mid-ocean ridges are punctuated by frequent physical disturbance. Larval dispersal among disjunct vent sites facilitates the persistence of sessile invertebrate species in these geologically and chemically dynamic habitats …
-
Spatial and temporal population genetics at deep-sea hydrothermal vents along the East Pacific Rise and Galápagos Rift
Ecological processes at deep-sea hydrothermal vents on fast-spreading mid-ocean ridges are punctuated by frequent physical disturbance. Larval dispersal among disjunct vent sites facilitates the persistence of sessile invertebrate species in these geologically and chemically dynamic habitats …
-
TIMELESS QUESTIONS AND MODERN CHALLENGES: A JOURNEY FROM THE ORIGIN OF LIFE IN HYDROTHERMAL VENTS TO ELECTROCHEMICAL CO2 REDUCTION
… for CO2 reduction. Oceanic hydrothermal vents (HTVs) are geological structures that played a key role 4 billion years ago in the formation of the very first organic molecules on our planet and, eventually, life itself. The minerals composing the vent structure, mainly iron (-nickel) …
-
Assessment of flagellate diversity at deep-sea hydrothermal vents using the combined approach of culture-dependent and culture-independent methods
… and cultured from four deep-sea hydrothermal vents in 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, …
-
The thermal evolution of subduction zone lithosphere: Evidence from the chemical development of Mt. Ruapehu and surrounding vents, New Zealand.
… collected from Mt. Ruapehu and nearby satellite vents was conducted to establish how differentiation processes in arc magmas change with time in response to tectonic movements in the arc lithosphere. The thickness and composition of the arc crust in the southern TVZ directly controls the …
-
Drivers, Dynamics and Hazards of the largest pyroclastic eruptions of Tongariro Volcano, Central North Island, New Zealand
… sequence revealed an 'unzipping' of eruption vents from north to south along the axis of the Tongariro Graben. The northern vents produced sustained Plinian eruption columns, while southern vents sourced unstable and collapsing sub-Plinian eruptions, the latter generating pyroclastic density …
Page 1 of 8