http://lod.bco-dmo.org/id/dataset/763941 eng; USA utf8 dataset Highest level of data collection, from a common set of sensors or instrumentation, usually within the same research project Biological and Chemical Oceanography Data Management Office (BCO-DMO) Unavailable 508-289-2009 WHOI MS#36 Woods Hole MA 02543 USA info@bco-dmo.org http://www.bco-dmo.org Monday - Friday 8:00am - 5:00pm For questions regarding this resource, please contact BCO-DMO via the email address provided. pointOfContact 2019-03-28 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) Radiocarbon [14C] ages of sedimentary organic matter and sedimentation rates for Guaymas Basin and Sonora Margin sediments collected from R/V El Puma, leaving Guaymas on October 14, 2014 and returning to Mazatlan on October 27, 2014 2019-03-13 publication 2019-03-13 revision Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA) 2019-06-04 publication https://doi.org/10.1575/1912/bco-dmo.763941.1 Andreas Teske University of North Carolina at Chapel Hill principalInvestigator Ana Christina Ravelo University of California-Santa Cruz principalInvestigator Biological and Chemical Oceanography Data Management Office (BCO-DMO) Unavailable 508-289-2009 WHOI MS#36 Woods Hole MA 02543 USA info@bco-dmo.org http://www.bco-dmo.org Monday - Friday 8:00am - 5:00pm For questions regarding this resource, please contact BCO-DMO via the email address provided. publisher Cite this dataset as: Teske, A., Ravelo, A. C. (2019) Radiocarbon [14C] ages of sedimentary organic matter and sedimentation rates for Guaymas Basin and Sonora Margin sediments collected from R/V El Puma, leaving Guaymas on October 14, 2014 and returning to Mazatlan on October 27, 2014. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2019-03-13 [if applicable, indicate subset used]. doi:10.1575/1912/bco-dmo.763941.1 [access date] Radiocarbon [14C] ages of sedimentary organic matter and sedimentation rates for Guaymas Basin and Sonora Margin sediments Dataset Description: &lt;p&gt;Radiocarbon [14C] ages of sedimentary organic matter and sedimentation rates for Guaymas Basin and Sonora Margin sediments collected from R/V El Puma (the Pacific Coast research vessel of the Autonomous University of Mexico) from October 14, 2014 to October 27, 2014.&lt;/p&gt; Methods and Sampling: &lt;p&gt;Sediment cores were obtained by Piston coring (using commercial PVC core liners) onboard R/V El Puma. The sediment cores were recovered during the RV El Puma cruise in October 2014. Core PO3 is from the northwestern ridge flanks [27°N 37.6759/111°W 52.5740; 1611 m depth], P10 is from ca. 1 mile west of Ringvent [27°N 30.5193/111°W 42.1722 W; 1731 m depth], core P11 is from the center of Ringvent [27°N 30.5090/111°W 40.6860, 1749 m], core P12 is from the upper Sonora Margin [27°N 52.1129/111°W 41.5902, 667 m], and core P13 is from the southeastern ridge flank of Guaymas Basin [27°N 12.4470/111°W 13.7735, 1859m]. Sedimentation rates were not inferred from cores P5 and P6 due to distortions by slumping. Measurements were made on bulk sediment without authigenic carbonate phases, and thus the majority of carbon in the samples is organic carbon produced by primary producers.&lt;/p&gt; &lt;p&gt;Samples selected for radiocarbon analyses were freeze-dried, homogenized, and acidified to remove CaCO₃, allowing for the analysis of remaining organic matter, and preventing the distortion of radiocarbon ages by methane-derived carbonates. Acidification was performed on ~200 mg of sample, which was treated with ~5ml buffered pH 5 acetic acid solution for ~24 hours to dissolve the CaCO₃. Samples were then rinsed with Milli-Q water 6 to 8 times to remove the acetic acid. Acidified samples were then freeze-dried again, re-homogenized and stored for ¹⁴C and ¹³C analysis. Radiocarbon dating was performed at Lawrence Livermore National Laboratory Center for Accelerator Mass Spectrometry, and a reservoir age of 406 years was used before conversion to calendar years using CALIB REV7.1.0. (Stuiver et al. 2019). The d¹³C values of all the acidified samples used for radiocarbon analyses were approximately -20 to -22‰, as expected from marine (primary producers) derived organic matter.&lt;/p&gt; Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-0939564 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=0939564 Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1449604 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1449604 completed Andreas Teske University of North Carolina at Chapel Hill 508-287-1648 Department of Marine Sciences 3117B Venable Hall, CB 3300 Chapel Hill NC 27599 USA teske@email.unc.edu pointOfContact Ana Christina Ravelo University of California-Santa Cruz 831-459-3722 Ocean Sciences Department 1156 High Street Santa Cruz CA 95064 USA acr@ucsc.edu pointOfContact asNeeded Dataset Version: 1 Unknown Core Depth_in_core C14_age C14_age_uncertainty Calendar_age Sed_Rate theme None, User defined sample identification depth core carbon-14 age dating No BCO-DMO term featureType BCO-DMO Standard Parameters Accelerator Mass Spectrometer Piston Corer instrument BCO-DMO Standard Instruments Guaymas_2014 service Deployment Activity Guaymas to Mazatlan place Locations otherRestrictions otherRestrictions Access Constraints: none. Use Constraints: Please follow guidelines at: http://www.bco-dmo.org/terms-use Distribution liability: Under no circumstances shall BCO-DMO be liable for any direct, incidental, special, consequential, indirect, or punitive damages that result from the use of, or the inability to use, the materials in this data submission. If you are dissatisfied with any materials in this data submission your sole and exclusive remedy is to discontinue use. Center for Dark Energy Biosphere Investigations http://www.darkenergybiosphere.org Center for Dark Energy Biosphere Investigations The mission of the Center for Dark Energy Biosphere Investigations (C-DEBI) is to explore life beneath the seafloor and make transformative discoveries that advance science, benefit society, and inspire people of all ages and origins. C-DEBI provides a framework for a large, multi-disciplinary group of scientists to pursue fundamental questions about life deep in the sub-surface environment of Earth. The fundamental science questions of C-DEBI involve exploration and discovery, uncovering the processes that constrain the sub-surface biosphere below the oceans, and implications to the Earth system. What type of life exists in this deep biosphere, how much, and how is it distributed and dispersed? What are the physical-chemical conditions that promote or limit life? What are the important oxidation-reduction processes and are they unique or important to humankind? How does this biosphere influence global energy and material cycles, particularly the carbon cycle? Finally, can we discern how such life evolved in geological settings beneath the ocean floor, and how this might relate to ideas about the origin of life on our planet? C-DEBI's scientific goals are pursued with a combination of approaches: (1) coordinate, integrate, support, and extend the research associated with four major programs—Juan de Fuca Ridge flank (JdF), South Pacific Gyre (SPG), North Pond (NP), and Dorado Outcrop (DO)—and other field sites; (2) make substantial investments of resources to support field, laboratory, analytical, and modeling studies of the deep subseafloor ecosystems; (3) facilitate and encourage synthesis and thematic understanding of submarine microbiological processes, through funding of scientific and technical activities, coordination and hosting of meetings and workshops, and support of (mostly junior) researchers and graduate students; and (4) entrain, educate, inspire, and mentor an interdisciplinary community of researchers and educators, with an emphasis on undergraduate and graduate students and early-career scientists. Note: Katrina Edwards was a former PI of C-DEBI; James Cowen is a former co-PI. Data Management: C-DEBI is committed to ensuring all the data generated are publically available and deposited in a data repository for long-term storage as stated in their Data Management Plan (PDF) and in compliance with the NSF Ocean Sciences Sample and Data Policy. The data types and products resulting from C-DEBI-supported research include a wide variety of geophysical, geological, geochemical, and biological information, in addition to education and outreach materials, technical documents, and samples. All data and information generated by C-DEBI-supported research projects are required to be made publically available either following publication of research results or within two (2) years of data generation. To ensure preservation and dissemination of the diverse data-types generated, C-DEBI researchers are working with BCO-DMO Data Managers make data publicly available online. The partnership with BCO-DMO helps ensure that the C-DEBI data are discoverable and available for reuse. Some C-DEBI data is better served by specialized repositories (NCBI's GenBank for sequence data, for example) and, in those cases, BCO-DMO provides dataset documentation (metadata) that includes links to those external repositories. C-DEBI largerWorkCitation program RAPID proposal: Site characterization cruise to document the active and extensive subsurface biosphere in the Guaymas Basin https://osprey.bco-dmo.org/project/626087 RAPID proposal: Site characterization cruise to document the active and extensive subsurface biosphere in the Guaymas Basin <p><em>Description from NSF project abstract:</em><br /> The Guaymas Basin in the central Gulf of California is an active tectonic spreading center overlain with thick, organic-rich sediments. In contrast to typical deep-water, mid-ocean ridge spreading centers that have very focused magmatism and little or no sediment, magmatism in the Guaymas Basis is more broadly distributed. This broadly-distributed magmatism significantly expands the fraction of organic-rich sediments that may be subject to alteration by the magmatic heat and thus it greatly expands the range of environments that support hydrocarbon generation and microbial populations in the sediments. Recognition that magmatism is not confined to the spreading axis, but instead is distributed throughout Guaymas Basin, suggests that models for the natural sequestration of carbon, the formation of oceanic crust, and life in the subsurface in marginal rift basins should be reconsidered as this has implications for the long-term removal of atmospheric carbon dioxide (and hence potential climatic implications). The Principal Investigator of this RAPID proposal is a lead proponent on an International Ocean Discovery Program (IODP) proposal to study this system in depth through scientific ocean drilling. To properly plan this expensive IODP expedition, additional site characterization gained from sediment sampling and seismic data is required. This proposal requests funds for the Principal Investigator to participate on an already planned site survey cruise aboard the Mexican Research Vessel (RV) El Puma. The results from this cruise will provide valuable data, at an exceptionally low investment, to guide decisions about potential future scientific drilling in the Guaymas Basin.</p> <p>This RAPID proposal requests funds for the Principal Investigator to participate on a Mexican site survey cruise in October 2014 on RV El Puma to collect five-meter gravity cores of an extensive sediment transect across the Guaymas Basin and to integrate sequencing-based microbial community analyses of subsurface bacteria and archaea with biogechemical characterizations of these subsurface sediments. Gravity coring and microbial community analysis will target cold non-hydrothermal sediments as well as off-axis hydrothermally-influenced sediments. The gravity coring campaign and the geochemistry/microbiology studies are coordinated with heatflow measurements and extensive 2D seismic analysis and high-resolution 3D seismic mapping by other planned Mexican and German cruises. This multi-pronged strategy will deliver the additional data and complete the site characterizations that are required to properly plan a potential IODP drilling expedition by the JOIDES Resolution.</p> RAPID Guaymas Basin largerWorkCitation project eng; USA oceans Guaymas to Mazatlan -111 -111 27 27 2014-10-14 2014-10-27 Guaymas Basin 0 BCO-DMO catalogue of parameters from Radiocarbon [14C] ages of sedimentary organic matter and sedimentation rates for Guaymas Basin and Sonora Margin sediments collected from R/V El Puma, leaving Guaymas on October 14, 2014 and returning to Mazatlan on October 27, 2014 Biological and Chemical Oceanography Data Management Office (BCO-DMO) Unavailable 508-289-2009 WHOI MS#36 Woods Hole MA 02543 USA info@bco-dmo.org http://www.bco-dmo.org Monday - Friday 8:00am - 5:00pm For questions regarding this resource, please contact BCO-DMO via the email address provided. pointOfContact http://lod.bco-dmo.org/id/dataset-parameter/763973.rdf Name: Core Units: unitless Description: <p>Core identification</p> http://lod.bco-dmo.org/id/dataset-parameter/763974.rdf Name: Depth_in_core Units: centimters (cm) Description: <p>Depth in core</p> http://lod.bco-dmo.org/id/dataset-parameter/763975.rdf Name: C14_age Units: years before present (ybp) Description: <p>14C age</p> http://lod.bco-dmo.org/id/dataset-parameter/763976.rdf Name: C14_age_uncertainty Units: +/- years before present (ybp) Description: <p>Inherent uncertainty in the 14C method (+/- years)</p> http://lod.bco-dmo.org/id/dataset-parameter/763977.rdf Name: Calendar_age Units: years before present (ybp) Description: <p>Calendar age</p> http://lod.bco-dmo.org/id/dataset-parameter/763978.rdf Name: Sed_Rate Units: millimeters per year (mm/year) Description: <p>Sedimentation rate; based on using the youngest and oldest samples to obtain an average for the dated part of the core.</p> GB/NERC/BODC > British Oceanographic Data Centre, Natural Environment Research Council, United Kingdom Biological and Chemical Oceanography Data Management Office (BCO-DMO) Unavailable 508-289-2009 WHOI MS#36 Woods Hole MA 02543 USA info@bco-dmo.org http://www.bco-dmo.org Monday - Friday 8:00am - 5:00pm For questions regarding this resource, please contact BCO-DMO via the email address provided. pointOfContact 596 https://darchive.mblwhoilibrary.org/bitstream/1912/24196/1/dataset-763941_radiocarbon-ages-guaymas-basin-and-sonora-margin-sediments__v1.tsv download https://doi.org/10.1575/1912/bco-dmo.763941.1 download onLine dataset &lt;p&gt;Sediment cores were obtained by Piston coring (using commercial PVC core liners) onboard R/V El Puma. The sediment cores were recovered during the RV El Puma cruise in October 2014. Core PO3 is from the northwestern ridge flanks [27°N 37.6759/111°W 52.5740; 1611 m depth], P10 is from ca. 1 mile west of Ringvent [27°N 30.5193/111°W 42.1722 W; 1731 m depth], core P11 is from the center of Ringvent [27°N 30.5090/111°W 40.6860, 1749 m], core P12 is from the upper Sonora Margin [27°N 52.1129/111°W 41.5902, 667 m], and core P13 is from the southeastern ridge flank of Guaymas Basin [27°N 12.4470/111°W 13.7735, 1859m]. Sedimentation rates were not inferred from cores P5 and P6 due to distortions by slumping. Measurements were made on bulk sediment without authigenic carbonate phases, and thus the majority of carbon in the samples is organic carbon produced by primary producers.&lt;/p&gt; &lt;p&gt;Samples selected for radiocarbon analyses were freeze-dried, homogenized, and acidified to remove CaCO₃, allowing for the analysis of remaining organic matter, and preventing the distortion of radiocarbon ages by methane-derived carbonates. Acidification was performed on ~200 mg of sample, which was treated with ~5ml buffered pH 5 acetic acid solution for ~24 hours to dissolve the CaCO₃. Samples were then rinsed with Milli-Q water 6 to 8 times to remove the acetic acid. Acidified samples were then freeze-dried again, re-homogenized and stored for ¹⁴C and ¹³C analysis. Radiocarbon dating was performed at Lawrence Livermore National Laboratory Center for Accelerator Mass Spectrometry, and a reservoir age of 406 years was used before conversion to calendar years using CALIB REV7.1.0. (Stuiver et al. 2019). The d¹³C values of all the acidified samples used for radiocarbon analyses were approximately -20 to -22‰, as expected from marine (primary producers) derived organic matter.&lt;/p&gt; Specified by the Principal Investigator(s) &lt;p&gt;Data notes:&lt;br /&gt; The sedimentation Rate (Sed_Rate) is based on using the youngest and oldest samples to obtain an average for the dated part of the core.&lt;br /&gt; ** = outlier&lt;/p&gt; &lt;p&gt;BCO-DMO Processing:&lt;br /&gt; - copied values from merged cells into each row;&lt;br /&gt; - modified column headers (replaced spaces with underscores, renamed standard deviation columns for clarity);&lt;br /&gt; - separated original C14_age column into two: one for the value and one for the stdev.&lt;/p&gt; Specified by the Principal Investigator(s) asNeeded 7.x-1.1 Biological and Chemical Oceanography Data Management Office (BCO-DMO) Unavailable 508-289-2009 WHOI MS#36 Woods Hole MA 02543 USA info@bco-dmo.org http://www.bco-dmo.org Monday - Friday 8:00am - 5:00pm For questions regarding this resource, please contact BCO-DMO via the email address provided. pointOfContact PI Supplied Instrument Name: PI Supplied Instrument Description:Radiocarbon dating was performed at Lawrence Livermore National Laboratory Center for Accelerator Mass Spectrometry, using the 1 MV AMS system based around a NEC 3SDH-1 accelerator. Instrument Name: Accelerator Mass Spectrometer Instrument Short Name:AMS Instrument Description: An AMS measures "long-lived radionuclides that occur naturally in our environment. AMS uses a particle accelerator in conjunction with ion sources, large magnets, and detectors to separate out interferences and count single atoms in the presence of 1x1015 (a thousand million million) stable atoms, measuring the mass-to-charge ratio of the products of sample molecule disassociation, atom ionization and ion acceleration." AMS permits ultra low-level measurement of compound concentrations and isotope ratios that traditional alpha-spectrometry cannot provide. More from Purdue University: http://www.physics.purdue.edu/primelab/introduction/ams.html Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/LAB17/ PI Supplied Instrument Name: Instrument Name: Piston Corer Instrument Short Name:Piston Corer Instrument Description: The piston corer is a type of bottom sediment sampling device. A long, heavy tube is plunged into the seafloor to extract samples of mud sediment. A piston corer uses a "free fall" of the coring rig to achieve a greater initial force on impact than gravity coring. A sliding piston inside the core barrel reduces inside wall friction with the sediment and helps to evacuate displaced water from the top of the corer. A piston corer is capable of extracting core samples up to 90 feet in length. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/51/ Cruise: Guaymas_2014 Guaymas_2014 R/V El Puma vessel Guaymas_2014 Andreas Teske University of North Carolina at Chapel Hill R/V El Puma vessel