By D.C. Mosher, Craig Shipp, Lorena Moscardelli, Jason Chaytor, Chris Baxter, Homa Lee, Roger Urgeles
Recent worldwide occasions similar to the devastating 1998 Papua New Guinea tsunami, the 2004 Sumatran tsunami and the 2006 SE Asia undersea community cable failure underscore the societal and monetary results of submarine mass events. those occasions name upon the medical group to appreciate submarine mass flow tactics and results to help in chance overview, mitigation and making plans. also, submarine mass pursuits are commencing to be famous as ordinary in continental margin geologic sections. As such, they symbolize an important if now not dominant function in margin sedimentary approaches. in addition they signify a possible possibility to hydrocarbon exploration and improvement, but in addition characterize exploration symptoms and objectives. This quantity involves a suite of the most recent clinical examine through foreign specialists in geological, geophysical, engineering and setting elements of submarine mass disasters, focussed on knowing the whole spectrum of demanding situations provided by means of submarine mass routine and their consequences.
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Fresh worldwide occasions similar to the devastating 1998 Papua New Guinea tsunami, the 2004 Sumatran tsunami and the 2006 SE Asia undersea community cable failure underscore the societal and monetary results of submarine mass hobbies. those occasions name upon the clinical neighborhood to appreciate submarine mass stream approaches and results to help in chance overview, mitigation and making plans.
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Extra info for Submarine Mass Movements and Their Consequences
H. Grozic Abstract Interest in methane gas production from hydrate deposits has increased dramatically in the last decade. Gas hydrates are solid crystalline compounds that encage gas molecules inside a water molecule lattice. Gas hydrates are linked to large submarine slides, in part because hydrate dissociation results in loss of solid material, production of free gas, and increased fluid pressures; all which have the effect of reducing sediment strength. Laboratory experiments, small scale physical modeling, and theoretical slope stability analyses indicate that dissociation of even a small amount of hydrate can cause significant loss of sediment strength.
G. Nisbet and Piper 1998; Silva et al. this volume). It is apparent on continental margins, for example, that submarine mass movement deposits form a significant, if not majority proportion of their sedimentary succession (Boyd et al. this volume; Giles et al. this volume). g. Talling et al. 2007). g. organics, trace metals) from shallow to deep water. This relatively recent understanding has yet to be adequately accounted for in consideration of sediment and carbon budgets and residence time as well as in sedimentologic and sequence stratigraphic models.
7 Circular slip plane formed through the base of the dissociated hydrate puck in a 10° slope (Gidley and Grozic 2008) tive to the overburden) were generated through dissociation, which due to the low shear strength of the sediment resulted in preconditioning the sediment mass to failure. Upon completion of the testing, the end wall was removed and a slide rapidly developed starting with a rotational failure along the slip plane through the dissociated hydrate. 4 Discussion Both laboratory and theoretical studies have confirmed that gas hydrates dissociation produces excess pore pressures.