@article {Smith2014,
	title = {{Development and evolution of detachment faulting along 50 km of the Mid-Atlantic Ridge near 16.5{\textdegree}N}},
	journal = {Geochemistry, Geophysics, Geosystems},
	volume = {15},
	number = {12},
	year = {2014},
	pages = {4692{\textendash}4711},
	abstract = {A multifaceted study of the slow spreading Mid-Atlantic Ridge (MAR) at 16.5{\textdegree}N provides new insights into detachment faulting and its evolution through time. The survey included regional multibeam bathymetry mapping, high-resolution mapping using AUV Sentry, seafloor imaging using the TowCam system, and an extensive rock-dredging program. At different times, detachment faulting was active along \~{}50 km of the western flank of the study area, and may have dominated spreading on that flank for the last 5 Ma. Detachment morphologies vary and include a classic corrugated massif, noncorrugated massifs, and back-tilted ridges marking detachment breakaways. High-resolution Sentry data reveal a new detachment morphology; a low-angle, irregular surface in the regional bathymetry is shown to be a finely corrugated detachment surface (corrugation wavelength of only tens of meters and relief of just a few meters). Multiscale corrugations are observed 2{\textendash}3 km from the detachment breakaway suggesting that they formed in the brittle layer, perhaps by anastomosing faults. The thin wedge of hanging wall lavas that covers a low-angle (6{\textdegree}) detachment footwall near its termination are intensely faulted and fissured; this deformation may be enhanced by the low angle of the emerging footwall. Active detachment faulting currently is limited to the western side of the rift valley. Nonetheless, detachment fault morphologies also are present over a large portion of the eastern flank on crust {\textgreater}2 Ma, indicating that within the last 5 Ma parts of the ridge axis have experienced periods of two-sided detachment faulting.},
	keywords = {AUV Sentry (Autonomous Underwater Vehicle)},
	doi = {10.1002/2014GC005563},
	author = {Smith, D K and Schouten, H and Dick, H J B and Cann, J R and Salters, V and Marschall, H R and Ji, F and Yoerger, D R and Sanfilippo, A and Parnell-Turner, R and Palmiotto, C and Zheleznov, A and Bai, H and Junkin, W and Urann, B and Dick, S and Sulanowska, M and Lemmond, P and Curry, S}
}
@article {Feseker2014,
	title = {{Eruption of a deep-sea mud volcano triggers rapid sediment movement}},
	journal = {Nature Communications},
	volume = {5},
	year = {2014},
	pages = {5385},
	abstract = {Submarine mud volcanoes are important sources of methane to the water column. However, the temporal variability of their mud and methane emissions is unknown. Methane emissions were previously proposed to result from a dynamic equilibrium between upward migration and consumption at the seabed by methane-consuming microbes. Here we show non-steady-state situations of vigorous mud movement that are revealed through variations in fluid flow, seabed temperature and seafloor bathymetry. Time series data for pressure, temperature, pH and seafloor photography were collected over 431 days using a benthic observatory at the active H{\aa}kon Mosby Mud Volcano. We documented 25 pulses of hot subsurface fluids, accompanied by eruptions that changed the landscape of the mud volcano. Four major events triggered rapid sediment uplift of more than a metre in height, substantial lateral flow of muds at average velocities of 0.4 m per day, and significant emissions of methane and CO2 from the seafloor.},
	keywords = {AUV Sentry (Autonomous Underwater Vehicle)},
	doi = {10.1038/ncomms6385},
	author = {Feseker, T and Boetius, A and Wenzh{\"o}fer, F and Blandin, J and Olu, K and Yoerger, D R and Camilli, R and German, C R and de Beer, D}
}
@article {Parnell-Turner2014,
	title = {{Sedimentation rates test models of oceanic detachment faulting}},
	journal = {Geophysical Research Letters},
	volume = {41},
	number = {20},
	year = {2014},
	pages = {7080{\textendash}7088},
	abstract = {Long-lived detachment faults play an important role in the construction of new oceanic crust at slow-spreading mid-oceanic ridges. Although the corrugated surfaces of exposed low-angle faults demonstrate past slip, it is difficult to determine whether a given fault is currently active. If inactive, it is unclear when slip ceased. This judgment is crucial for tectonic reconstructions where detachment faults are present, and for models of plate spreading. We quantify variation in sediment thickness over two corrugated surfaces near 16.5{\textdegree}N at the Mid-Atlantic Ridge using near-bottom Compressed High Intensity Radar Pulse (CHIRP) data. We show that the distribution of sediment and tectonic features at one detachment fault is consistent with slip occurring today. In contrast, another corrugated surface 20 km to the south shows a sediment distribution suggesting that slip ceased {\~{}}150,000 years ago. Data presented here provide new evidence for active detachment faulting, and suggest along-axis variations in fault activity occur over tens of kilometers.},
	keywords = {AUV Sentry (Autonomous Underwater Vehicle)},
	doi = {10.1002/2014GL061555},
	author = {Parnell-Turner, R and Cann, J R and Smith, D K and Schouten, H and Yoerger, D R and Palmiotto, C and Zheleznov, A and Bai, H}
}
@article {Wagner2013,
	title = {{Cold-seep habitat mapping: High-resolution spatial characterization of the Blake Ridge Diapir seep field}},
	journal = {Deep-Sea Research. Part II: Topical Studies in Oceanography},
	volume = {92},
	number = {SI},
	year = {2013},
	pages = {183{\textendash}188},
	abstract = {Relationships among seep community biomass, diversity, and physiographic controls such as underlying geology are not well understood. Previous efforts to constrain these relationships at the Blake Ridge Diapir were limited to observations from piloted deep-submergence vehicles. In August 2012, the autonomous underwater vehicle (AUV) Sentry collected geophysical and photographic data over a 0.131~km2 area at the Blake Ridge Diapir seeps. A nested survey approach was used that began with a regional or reconnaissance-style survey using sub-bottom mapping systems to locate and identify seeps and underlying conduits. This survey was followed by AUV-mounted sidescan sonar and multibeam echosounder systems mapping on a mesoscale to characterize the seabed physiography. At the most detailed survey level, digital photographic imaging was used to resolve sub-meter characteristics of the biology. Four pockmarks (25{\textendash}70~m diameter) were documented, each supporting chemosynthetic communities. Concentric zonation of mussels and clams suggests the influence of chemical gradients on megafaunal distribution. Data collection and analytical techniques used here yield high-resolution habitat maps that can serve as baselines to constrain temporal evolution of seafloor seeps, and to inform ecological niche modeling and resource management.},
	keywords = {AUV Sentry (Autonomous Underwater Vehicle)},
	doi = {10.1016/j.dsr2.2013.02.008},
	author = {Wagner, J K S and McEntee, M H and Brothers, L L and German, C R and Kaiser, C L and Yoerger, D R and Van Dover, C L}
}
@article {Brothers2013,
	title = {{Evidence for extensive methane venting on the southeastern U.S. Atlantic margin}},
	journal = {Geology},
	volume = {41},
	number = {7},
	year = {2013},
	month = {jul},
	pages = {807{\textendash}810},
	abstract = {We present the first evidence for widespread seabed methane venting along the southeastern United States Atlantic margin beyond the well-known Blake Ridge diapir seep. Recent ship- and autonomous underwater vehicle (AUV)-collected data resolve multiple water-column anomalies ({\textgreater}1000 m height) and extensive new chemosynthetic seep communities at the Blake Ridge and Cape Fear diapirs. These results indicate that multiple, highly localized fluid conduits punctuate the areally extensive Blake Ridge gas hydrate province, and enable the delivery of significant amounts of methane to the water column. Thus, there appears to be an abundance of seabed fluid flux not previously ascribed to the Atlantic margin of the United States.},
	keywords = {AUV Sentry (Autonomous Underwater Vehicle)},
	issn = {0091-7613},
	doi = {10.1130/G34217.1},
	author = {Brothers, L L and Van Dover, C L and German, C R and Kaiser, C L and Yoerger, D R and Ruppel, C D and Lobecker, E and Skarke, A D and Wagner, J K S}
}
@conference {Kaiser2012,
	title = {{Satellite based remote management and operation of a 6000m AUV}},
	booktitle = {Oceans, 2012},
	volume = {Hampton Ro},
	year = {2012},
	abstract = {During a July, 2012 expedition to the Hatteras Transverse Canyon, Blake Ridge, and Cape Fear Diapir, the AUV Sentry, aboard the NOAA Ship Okeanos, conducted experiments into remote operation of an AUV via satellite link. Remote launch, remote engineering, remote data processing and remote watch standing were all explored with varying degrees of success. Remote engineering and troubleshooting was found to be exceptionally promising and worthy of further effort. Remote data processing was a valuable addition for a telepresence enabled cruise where a substantial component of the science team was on shore. Remore watch standing and remote launch were both found to be viable though requiring improvement. Technology infrastructure is discussed along with successes, difficulties, and recommendations for future improvement.},
	keywords = {AUV Sentry (Autonomous Underwater Vehicle)},
	doi = {10.1109/OCEANS.2012.6404900},
	author = {Kaiser, C L and Kinsey, J C and Pinner, W and Yoerger, D R and German, C R and Van Dover, C L}
}
@article {Kinsey2011,
	title = {{Assessing the Deepwater Horizon oil spill with the Sentry autonomous underwater vehicle}},
	journal = {2011 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS)},
	year = {2011},
	pages = {261{\textendash}267},
	abstract = {This paper reports the Sentry autonomous underwater vehicle and its deployment on two cruises in response to the Deepwater Horizon oil spill. The first cruise, in June 2010, coupled Sentry with the TETHYS mass spectrometer to track and localize a subsea hydrocarbon plume at a depth of approximately 1100m going at least 30km from the oil spill site. In December 2010, Sentry mapped and photographed deep-sea biological communities for follow-up observations and sampling with the Alvin manned submersible. These cruises demonstrate how robots and novel sensing technologies contributed to the oil spill assessment and the broader impact of technologies developed for basic research.},
	keywords = {AUV Sentry (Autonomous Underwater Vehicle)},
	doi = {10.1109/IROS.2011.6095008},
	author = {Kinsey, J C and Yoerger, D R and Jakuba, M V and Camilli, Rich and Fisher, C R and German, C R}
}
@article {Valentine2010,
	title = {{Asphalt volcanoes as a potential source of methane to late Pleistocene coastal waters}},
	journal = {Nature Geoscience},
	volume = {3},
	number = {5},
	year = {2010},
	pages = {345{\textendash}348},
	abstract = {Every year, natural petroleum seepage emits 0.2{\textendash}2 Tg of oil to the ocean1. Significant oil seepage can build large underwater mounds, consisting of tar deposits with morphologies similar to volcanic lava flows, known as asphalt volcanoes2, 3. Such events are typically accompanied by large fluxes of the greenhouse gas methane4, 5. Marine sediments from the Santa Barbara basin, California, contain a record of elevated methane concentrations6, anoxia and tar deposition7 during the Pleistocene epoch that had been attributed to dissolution of methane hydrates. However, the region is known to have exhibited oil seepage in the past7. Here, we document the discovery of seven extinct asphalt volcanoes off the coast of southern California. The morphology of the deposits and geochemistry of samples taken from the two largest structures supports their classification as asphalt volcanoes, derived from a common source. We estimate that the two structures resulted from seepage of 0.07{\textendash}0.4 Tg of oil, accompanied by the emission of 0.35{\textendash}1.8 Tg of methane. Radiocarbon dating of carbonate deposits entrained with the asphalt indicates formation of the volcanoes between 44 and 31 kyr ago. The timing and volume of erupted hydrocarbons from the asphalt structures can explain some or all of the documented methane release and tar accumulation in the Santa Barbara basin during the Pleistocene.},
	keywords = {AUV Sentry (Autonomous Underwater Vehicle), HOV Alvin (Human Occupied Vehicle)},
	issn = {1752-0894},
	doi = {10.1038/ngeo848},
	url = {http://dx.doi.org/10.1038/ngeo848},
	author = {Valentine, D L and Reddy, C M and Farwell, C and Hill, T M and Pizarro, O and Yoerger, D R and Camilli, R and Nelson, R K and Peacock, E E and Bagby, S C and Clarke, B A and Roman, C N and Soloway, M}
}
@article {German2008,
	title = {{Hydrothermal exploration with the Autonomous Benthic Explorer}},
	journal = {Deep-Sea Research. Part I: Oceanographic Research Papers},
	volume = {55},
	number = {2},
	year = {2008},
	pages = {203{\textendash}219},
	keywords = {AUV ABE (Autonomous Benthic Explorer), AUV Sentry (Autonomous Underwater Vehicle), ROV DSL-120 (Remotely Operated Vehicle)},
	issn = {0967-0637},
	doi = {10.1016/j.dsr.2007.11.004},
	url = {http://dx.doi.org/10.1016/j.dsr.2007.11.004},
	author = {German, C R and Yoerger, D R and Jakuba, M V and Shank, T M and Langmuir, C H and Nakamura, K I}
}
