Download or read book The Occurrence and Distribution of Gas Hydrates on the Puysegur Continental Margin and Slope stability Aspects on Ritchie Banks Hikurangi Margin New Zealand written by Miko Fohrmann and published by . This book was released on 2009 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Natural Gas Hydrate written by M.D. Max and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 665 pages. Available in PDF, EPUB and Kindle. Book excerpt: 1. THE BEGINNINGS OF HYDRATE RESEARCH Until very recently, our understanding of hydrate in the natural environment and its impact on seafloor stability, its importance as a sequester of methane, and its potential as an important mechanism in the Earth's climate change system, was masked by our lack of appreciation of the vastness of the hydrate resource. Only a few publications on naturally occurring hydrate existed prior to 1975. The first published reference to oceanic gas hydrate (Bryan and Markl, 1966) and the first publication in the scientific literature (Stoll, et a1., 1971) show how recently it has been since the topic of naturally occurring hydrate has been raised. Recently, however, the number of hydrate publications has increased substantially, reflecting increased research into hydrate topics and the initiation of funding to support the researchers. Awareness of the existence of naturally occurring gas hydrate now has spread beyond the few scientific enthusiasts who pursued knowledge about the elusive hydrate because of simple interest and lurking suspicions that hydrate would prove to be an important topic. The first national conference on gas hydrate in the U.S. was held as recently as April, 1991 at the U.S. National Center of the U.s. Geological Survey in Reston Virginia (Max et al., 1991). The meeting was co-hosted by the U.s. Geological Survey, the Naval Research Laboratory, and the U.S.
Download or read book Gas Hydrate written by Umberta Tinivella and published by MDPI. This book was released on 2019-11-28 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Special Issue reports research spanning from the analysis of indirect data, modeling, and laboratory and geological data confirming the intrinsic multidisciplinarity of gas hydrate studies. The study areas are (1) Arctic, (2) Brazil, (3) Chile, and (4) the Mediterranean region. The results furnished an important tessera of the knowledge about the relationship of a gas hydrate system with other complex natural phenomena such as climate change, slope stability and earthquakes, and human activities.
Download or read book Gas Hydrates written by J.-P. Henriet and published by Geological Society of London. This book was released on 1998 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: From a geological perspective, gas hydrates are an important feature of the shallow geosphere. If current estimates are correct, gas hydrates contain more potential fossil fuel energy than is present in conventional oil, gas and coal deposits, although it is uncertain how much of this can be exploited. They are also geological agents that affect the physical, geophysical and geochemical properties of sediments. Oceanic gas hydrates are increasingly recognized as a major potential hazard for the stability of offshore structures in various deep-water hydrocarbon provinces. The possibility also exists that a large release of methane from gas hydrates may have a significant impact on the radiative properties of the atmosphere and thus influence global climate: past, present and future. Following an introduction and overviews, this book covers analysis and modelling of hydrate formation; exploration strategy and reservoir evaluation; regional case studies; relevance to margin stability and climate change. Hydrate research informatiloln is presented from the USA, Russia, South Asia and the European Union.
Download or read book Gas Hydrates Relevance to World Margin Stability and Climatic Change written by Jean- Pierre (Conv.) Henriet and published by . This book was released on 1996 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sediment hosted Gas Hydrates written by D. Long and published by Geological Society of London. This book was released on 2009 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is much interest in gas hydrates in relation to their potential role as an important driver for climate change and as a major new energy source; however, many questions remain, not least the size of the global hydrate budget. Much of the current uncertainty centres on how hydrates are physically stored in sediments at a range of scales. This volume details advances in our understanding of sediment-hosted hydrates, and contains papers covering a range of studies of real and artificial sediments containing both methane hydrates and CO2 hydrates. The papers include an examination of the techniques used to locate, sample and characterize hydrates from natural, methane-rich systems, so as to understand them better. Other contributions consider the nature and stability of synthetic hydrates formed in the laboratory, which in turn improve our ability to make accurate predictive models.
Download or read book Geological Occurrence of Gas Hydrates at the Blake Outer Ridge Western North Atlantic written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The occurrence of gas hydrates at the Blake Outer Ridge, as confirmed by the Deep Sea Drilling Project (DSDP), is governed not only by gas-water phase relationships but also by interrelated geological constraints. The results of this reexamination of the DSDP data show that seafloor processes, topography, and sediment properties are among the factors that impact the stability and distribution of gas hydrate at the ridge. Rapid sedimentation and erosion have local and transient effects on thermal gradients, which cause the base of the hydrate stability zone to migrate. To a large degree, the convex shape of the Blake Outer Ridge allows gas hydrates to be stable. Low-permeability sediments occupy the interval in which the stability zone exists, and they influence hydrate occurrence by controlling the distribution of gas. A brief comparison of the Blake Outer Ridge with two more recently confirmed hydrate localities (the northern Gulf of Mexico and the Middle America's trench) shows little similarity among the three hydrate environments, but calls attention to the complex and often subtle effects that the geological system imposes on hydrate stability. 47 refs., 8 figs., 2 tabs.
Download or read book Deformation Fluid Venting and Slope Failure at an Active Margin Gas Hydrate Province Hydrate Ridge Cascadia Accretionary Wedge written by Joel E. Johnson and published by . This book was released on 2004 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the last 15 years, numerous geophysical surveys and geological sampling and coring expeditions have helped to characterize the tectonic setting, subsurface stratigraphy, and gas hydrate occurrence and abundance within the region of the accretionary wedge surrounding Hydrate Ridge. Because of these investigations, Hydrate Ridge has developed as an international site of active margin gas hydrate research. The manuscripts presented in this dissertation are focused on the geologic setting hosting the gas hydrate system on Hydrate Ridge. These papers examine how active margin tectonic processes influence both the spatial and temporal behavior of the gas hydrate system at Hydrate Ridge and likely across the margin. From a high resolution sidescan sonar survey (Chapter II) collected across the region, the distribution of high backscatter, as well as the locations of mud volcanoes and pockmarks indicates variations in the intensity and activity of fluid flow across the Hydrate Ridge region. Coupled with subsurface structural mapping, the origins for many of these features as well the locations of abundant gas hydrates can be linked to folds within the subsurface. Continued structural mapping, coupled with age constraints of the subsurface stratigraphy from ODP drilling, resulted in a model for the construction of the accretionary wedge within the Hydrate Ridge region (Chapter III). This model suggests the wedge advanced in three phases of growth since the late Pliocene and was significantly influenced by the deposition of the Astoria fan on the abyssal plain and left lateral strike slip faulting. Changes in structural vergence, documented here, also help explain the variability in bathymetric relief across the region. Determination of the occurrence and timing of Holocene slope failures derived from Hydrate Ridge (Chapter IV) and comparison with a Holocene marine record of Cascadia subduction zone earthquakes suggests earthquake induced slope failure within the gas hydrate stability zone does occur at Hydrate Ridge and thus, may represent a high frequency mechanism for the mobilization of seafloor and subseafloor gas hydrates across the margin.
Download or read book Occurrence of Natural Gas Hydrates in Sedimentary Basins written by Alberta Research Council and published by . This book was released on 1975 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Detection of Gas Hydrates in Garden Banks and Keathley Canyon from Seismic Data written by Idris Murad and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Gas hydrate is a potential energy source that has recently been the subject of much academic and industrial research. The search for deep-water gas hydrate involves many challenges that are especially apparent in the northwestern Gulf of Mexico, where the sub-seafloor is a complex structure of shallow salt diapirs and sheets underlying heavily deformed shallow sediments and surrounding diverse minibasins. Here, we consider the effect these structural factors have on gas hydrate occurrence in Garden Banks and Keathley Canyon blocks of the Gulf of Mexico. This was accomplished by first mapping the salt and shallow deformation structures throughout the region using a 2D grid of seismic reflection data. In addition, major deep-rooted faults and shallow-rooted faults were mapped throughout the area. A shallow sediment deformation map was generated that defined areas of significant faulting. We then quantified the thermal impact of shallow salt to better estimate the gas hydrate stability zone (GHSZ) thickness. The predicted base of the GHSZ was compared to the seismic data, which showed evidence for bottom simulating reflectors and gas chimneys. These BSRs and gas chimneys were used to ground-truth the calculated depth of the base of GHSZ. Finally, the calculated GHSZ thickness was used to estimate the volume of the gas hydrate reservoir in the area after determining the most reasonable gas hydrate concentrations in sediments within the GHSZ. An estimate of 5.5 trillion cubic meters of pure hydrate methane in Garden Banks and Keathley Canyon was obtained.
Download or read book Gas Hydrate Environmental and Climate Impacts written by Umberta Tinivella and published by . This book was released on 2019 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Special Issue reports research spanning from the analysis of indirect data, modeling, and laboratory and geological data confirming the intrinsic multidisciplinarity of gas hydrate studies. The study areas are (1) Arctic, (2) Brazil, (3) Chile, and (4) the Mediterranean region. The results furnished an important tessera of the knowledge about the relationship of a gas hydrate system with other complex natural phenomena such as climate change, slope stability and earthquakes, and human activities.
Download or read book Gas Hydrate System Dynamics in the Uruti Basin an Upper Slope Basin on New Zealand s Hikurangi Margin written by Dylan Baker and published by . This book was released on 2017 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ESTUARINE ECOSYSTEMS written by G. A. Knox and published by Springer. This book was released on 1986-11-30 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laboratory Instructions in Assaying and Practical Chemistry written by James Park and published by . This book was released on 1896 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Alluvial Mining written by Institution of Mining and Metallurgy (Great Britain) and published by Elsevier Applied Science. This book was released on 1991 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Living Tundra written by Yu I. Chernov and published by CUP Archive. This book was released on 1988-04-29 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: This account of the life of the tundra provides a fascinating insight into the ways in which animals, plants and climate interact in an inhospitable environment.
Download or read book Tropical Forests written by Peter D. Moore and published by Infobase Publishing. This book was released on 2009 with total page 267 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explores the biodiversity of forests, from microbes to mammals, as well as the adaptations of organisms to their environment and to the other species surrounding them. This book examines the interactions between organisms and their physical surroundings and the processes that link the two into an integrated ecosystem.
