Ricketts Richard D.

No Thumbnail Available
Last Name
Ricketts
First Name
Richard D.
ORCID

Filters

2017 - 2019 3 2020 - 2021 3
4 2
6
Reset filters

Settings

Search Results

Now showing 1 - 6 of 6
  • Dataset
    Underway data for Blue Heron cruise BH15-11 in the western arm of Lake Superior from August 2015 (Early Career Great Lakes research project, Novel Nutrient Paleoproxy project)
    (Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu, 2021-05-26) Horner, Tristan J. ; Pryer, Helena ; Ricketts, Richard D.
    Underway data for Blue Heron cruise BH15-11 in the western arm of Lake Superior from August 2015 (Early Career Great Lakes research project, Novel Nutrient Paleoproxy project). Underway surface sampling was collected aboard the RV Blue Heron during cruise BH15-11, which sailed from Duluth MN to Duluth MN during August 2015. For a complete list of measurements, refer to the full dataset description in the supplemental file 'Dataset_description.pdf'. The most current version of this dataset is available at: https://www.bco-dmo.org/dataset/709669
  • Dataset
    CTD and underwater mass spectrometer data acquired in 2017 aboard the RV/Endeavor (cruise EN602) in the the subtropical Atlantic using a Triaxus tow vehicle.
    (Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu, 2021-03-16) Loose, Brice ; Short, R. Timothy ; Toler, Strawn ; Agnich, Jason ; Gruebel, Erich ; Ricketts, Richard D.
    CTD and underwater mass spectrometer data acquired in 2017 aboard the RV/Endeavor (cruise EN602) in the the subtropical Atlantic using a Triaxus tow vehicle. For a complete list of measurements, refer to the full dataset description in the supplemental file 'Dataset_description.pdf'. The most current version of this dataset is available at: https://www.bco-dmo.org/dataset/828767
  • Article
    Publisher Correction : Pelagic barite precipitation at micromolar ambient sulfate
    (Nature Publishing Group, 2018-01-18) Horner, Tristan J. ; Pryer, Helena V. ; Nielsen, Sune G. ; Crockford, Peter W. ; Gauglitz, Julia M. ; Wing, Boswell A. ; Ricketts, Richard D.
    Correction to: Nature Communications https://doi.org/10.1038/s41467-017-01229-5, Article published online 07 November 2017
  • Article
    Pelagic barite precipitation at micromolar ambient sulfate
    (Nature Publishing Group, 2017-11-07) Horner, Tristan J. ; Pryer, Helena V. ; Nielsen, Sune G. ; Crockford, Peter W. ; Gauglitz, Julia M. ; Wing, Boswell A. ; Ricketts, Richard D.
    Geochemical analyses of sedimentary barites (barium sulfates) in the geological record have yielded fundamental insights into the chemistry of the Archean environment and evolutionary origin of microbial metabolisms. However, the question of how barites were able to precipitate from a contemporary ocean that contained only trace amounts of sulfate remains controversial. Here we report dissolved and particulate multi-element and barium-isotopic data from Lake Superior that evidence pelagic barite precipitation at micromolar ambient sulfate. These pelagic barites likely precipitate within particle-associated microenvironments supplied with additional barium and sulfate ions derived from heterotrophic remineralization of organic matter. If active during the Archean, pelagic precipitation and subsequent sedimentation may account for the genesis of enigmatic barite deposits. Indeed, barium-isotopic analyses of barites from the Paleoarchean Dresser Formation are consistent with a pelagic mechanism of precipitation, which altogether offers a new paradigm for interpreting the temporal occurrence of barites in the geological record.
  • Dataset
    Particulate multi-element geochemical concentrations, dissolved barium concentrations and barium-isotopic data collected during the R/V Blue Heron cruise BH15-11 in Lake Superior during August 2015
    (Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu, 2017-02-03) Horner, Tristan J. ; Ricketts, Richard D. ; Pryer, Helena V.
    Particles are important vectors of nutrients, carbon, and several trace metals within large bodies of water. Broadly speaking, particle distributions can be classified into three major groups on the basis of their multi-element geochemistry: biogenic (organic matter-associated phases and tests); lithogenic (highly refractory rock-derived materials); and authigenic (formed in situ below the euphotic zone). We collected particulate samples spanning the full water column of Lake Superior at Stations FWM (46.998528, -91.246250) and WM (47.331611, -89.821389) during the height of 2015 summer thermal stratification (cruise BH15-11). We analyzed particle leachates for their multi-element geochemistry using ICP-MS (inductively-coupled plasma mass spectrometry) at the Woods Hole Oceanographic Institution Plasma Facility. We report elemental concentrations in Lake Superior particulate matter in (nano or pico) moles per liter, defined by a 0.44 um filter cutoff. Lithogenic cycles are resolved by Al, Fe, Ti, V, and Y; biogenic phases by Ca, Cd, P, and Sr; and authigenic processes by Ba, Cd, and Mn. Several elements exhibit hybrid-type distributions depending on the depth range under investigation. Also reported are stable barium-isotopic distributions for particulate and total dissolvable Ba, measured using multiple-collector ICP-MS and reported relative to NIST SRM 3104a in permill. For a complete list of measurements, refer to the supplemental document 'Field_names.pdf', and a full dataset description is included in the supplemental file 'Dataset_description.pdf'. The most current version of this dataset is available at: http://www.bco-dmo.org/dataset/680091
  • Dataset
    CTD and underwater mass spectrometer data acquired in 2016 aboard the RV/Endeavor (cruise EN575) in the the subtropical Atlantic using a Triaxus tow vehicle.
    (Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu, 2021-03-16) Loose, Brice ; Short, R. Timothy ; Toler, Strawn ; Agnich, Jason ; Gruebel, Erich ; Ricketts, Richard D.
    CTD and underwater mass spectrometer data acquired in 2016 aboard the RV/Endeavor (cruise EN575) in the the subtropical Atlantic using a Triaxus tow vehicle. For a complete list of measurements, refer to the full dataset description in the supplemental file 'Dataset_description.pdf'. The most current version of this dataset is available at: https://www.bco-dmo.org/dataset/843222