@article {Clague2014,
	title = {{Eruptive and tectonic history of the Endeavour Segment, Juan de Fuca Ridge, based on AUV mapping data and lava flow ages}},
	journal = {Geochemistry, Geophysics, Geosystems},
	volume = {15},
	number = {8},
	year = {2014},
	pages = {3364{\textendash}3391},
	abstract = {High-resolution bathymetric surveys from autonomous underwater vehicles ABE and D. Allan B. were merged to create a coregistered map of 71.7 km(2) of the Endeavour Segment of the Juan de Fuca Ridge. Radiocarbon dating of foraminifera in cores from three dives of remotely operated vehicle Doc Ricketts provide minimum eruption ages for 40 lava flows that are combined with the bathymetric data to outline the eruptive and tectonic history. The ages range from Modern to 10,700 marine-calibrated years before present (yr BP). During a robust magmatic phase from {\textgreater}10,700 yr BP to approximate to 4300 yr BP, flows erupted from an axial high and many flowed {\textgreater}5 km down the flanks; some partly buried adjacent valleys. Axial magma chambers (AMCs) may have been wider than today to supply dike intrusions over a 2 km wide axial zone. Summit Seamount formed by approximate to 4770 yr BP and was subsequently dismembered during a period of extension with little volcanism starting approximate to 4300 yr BP. This tectonic phase with only rare volcanic eruptions lasted until approximate to 2300 yr BP and may have resulted in near-solidification of the AMCs. The axial graben formed by crustal extension during this period of low magmatic activity. Infrequent eruptions occurred on the flanks between 2620-1760 yr BP and within the axial graben since approximate to 1750 yr BP. This most recent phase of limited volcanic and intense hydrothermal activity that began approximate to 2300 yr BP defines a hydrothermal phase of ridge development that coincides with the present-day 1 km wide AMCs and overlying hydrothermal vent fields.},
	keywords = {AUV ABE (Autonomous Benthic Explorer)},
	doi = {10.1002/2014GC005415},
	author = {Clague, D A and Dreyer, B M and Paduan, J B and Martin, J F and Caress, D W and Gill, J B and Kelley, D S and Thomas, H and Portner, R A and Delaney, J R and Guilderson, T P and McGann, M L}
}
@article {Lang2010,
	title = {{Elevated concentrations of formate, acetate and dissolved organic carbon found at the Lost City Hydrothermal Field}},
	journal = {Geochimica et Cosmochimica Acta},
	volume = {74},
	number = {3},
	year = {2010},
	pages = {941{\textendash}942},
	abstract = {Fluids from the ultramafic-hosted Lost City hydrothermal field were analyzed for total dissolved organic carbon and dissolved organic acids. Formate (36{\textendash}158 $μ$mol/kg) and acetate (1{\textendash}35 $μ$mol/kg) concentrations are higher than in other fluids from unsedimented hydrothermal vents, and are a higher ratio of the total dissolved organic carbon than has been found in most marine geothermal systems. Isotopic evidence is consistent with an abiotic formation mechanism for formate, perhaps during serpentinization processes in the sub-surface. Further support comes from previous studies where the abiological formation of low molecular weight organic acids has been shown to be thermodynamically favorable during hydrothermal alteration of olivine, and laboratory studies in which the reduction of carbon dioxide to formate has been confirmed. As the second most prevalent carbon species after methane, formate may be an important substrate to microbial communities in an environment where dissolved inorganic carbon is limited. Acetate is found in locations where sulfate reduction is believed to be important and is likely to be a microbial by-product, formed either directly by autotrophic metabolic activity or indirectly during the fermentative degradation of larger organic molecules. Given the common occurrence of exposed ultramafic rocks and active serpentinization within the worlds ocean basins, the abiotic formation of formate may be an important process supporting life in these high pH environments and may have critical implications to understanding the organic precursors from which life evolved.},
	keywords = {HOV Alvin (Human Occupied Vehicle)},
	issn = {0016-7037},
	doi = {10.1016/j.gca.2009.10.045},
	url = {http://dx.doi.org/10.1016/j.gca.2009.10.045},
	author = {Lang, S Q and Butterfield, D A and Schulte, M and Kelley, D S and Lilley, M D}
}
