Description: Processed results from of surface x-ray florescence (XRF) analysis of the sediment grab samples recovered as part of the Long Island Sound mapping project Phase II. Sediment grab samples have been collected in the summers of 2017 and 2018 using a modified van Veen grab sampler. A subsample of the top two centimeter was taken for further lab analysis. Dried and homogenized splits of the samples were analyzed for chemical composition using an Innov-X Alpha series 4000 XRF (Innov-X Systems, Woburn, MA). The results of the measurements are presented as ppm. The XRF analytical protocol included the following elements: P, S, Cl, K, Ca, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn As, Se, Br, Rb, Sr, Zr, Mo, Ag, Cd, Sn, Sb, I, Ba, Hg, Pb, Bi, Th, and U. However, only Cl, K, Ca, Ti, Cr, Mn, Fe, Co, Cu, Zn, As, Br, Rb, Sr, Zr and Pb were consistently present at levels above background detection in surficial sediments collected in the LIS Phase II area. The data are presented as Excel spreadsheet.Time period of content: 2017-08-01 to 2022-11-16Attribute accuracy: The attribute accuracy varies by element and is measured as +/- 1 standard variationCompleteness: The dataset is mostly complete. A few samples had too little material to perform regular and acid-treated samples.Positional accuracy: Locations are based on DGPS using the ship GPS antenna for most cores resulting +/- 5 m accuracy.Attributes: Sample_ID: Text describing the Name of the grab sample, a combination of survey ID and grab sample number.Short_name: Text describing just the grab number, but without the survey IDLatitude: Latitude of grab sample stationLongitude: Longitude of grab sample stationP: measured Phosphate content in ppmP_err: uncertainty of Phosphate measurement S: measured Sulfate content in ppmS_err: uncertainty of Sulfate measurementCl: measured Chloride content in ppmCl_err: uncertainty of Chloride measurementK: measured Potassium content in ppmK_err: uncertainty of Potassium measurementCa: measured Calcium content in ppmCa_err: uncertainty of Calcium measurementTi_Leap: measured Titanium content in ppmTi_L_err: uncertainty of Titanium measurementTi: measured Titanium content in ppmTi_err: uncertainty of Titanium measurementV: measured Phosphate content in ppmV_err: uncertainty of Phosphate measurementCr_LEAP: measured Phosphate content in ppmCr_L_err: uncertainty of Phosphate measurementCr: measured Phosphate content in ppmCr_err: uncertainty of Phosphate measurementMn_Leap: measured Phosphate content in ppmMn_L_err: uncertainty of Phosphate measurementMn: measured Phosphate content in ppmMn_err: uncertainty of Phosphate measurementFe_Leap: measured Phosphate content in ppmFe_L_err: uncertainty of Phosphate measurementFe: measured Phosphate content in ppmFe_err: uncertainty of Phosphate measurementCo: measured Phosphate content in ppmCo_err: uncertainty of Phosphate measurementNi: measured Phosphate content in ppmNi_err: uncertainty of Phosphate measurementCu: measured Phosphate content in ppmCu_err: uncertainty of Phosphate measurementZn: measured Phosphate content in ppmZn_err: uncertainty of Phosphate measurementAs: measured Phosphate content in ppmAs_err: uncertainty of Phosphate measurementSe: measured Phosphate content in ppmSe_err: uncertainty of Phosphate measurementBr: measured Phosphate content in ppmBr_err: uncertainty of Phosphate measurementRb: measured Phosphate content in ppmRb_err: uncertainty of Phosphate measurementSr: measured Phosphate content in ppmSr_err: uncertainty of Phosphate measurementZr: measured Phosphate content in ppmZr_err: uncertainty of Phosphate measurementMo: measured Phosphate content in ppmMo_err: uncertainty of Phosphate measurementAg: measured Phosphate content in ppmAg_err: uncertainty of Phosphate measurementCd: measured Phosphate content in ppmCd_err: uncertainty of Phosphate measurementSn: measured Phosphate content in ppmSn_err: uncertainty of Phosphate measurementSb: measured Phosphate content in ppmSb_err: uncertainty of Phosphate measurement I: measured Phosphate content in ppmI_err: uncertainty of Phosphate measurementBa: measured Phosphate content in ppmBa_err: uncertainty of Phosphate measurementHg: measured Phosphate content in ppmHg_err: uncertainty of Phosphate measurementPb: measured Phosphate content in ppmPb_err: uncertainty of Phosphate measurementBi: measured Phosphate content in ppmBi_err: uncertainty of Phosphate measurementTh: measured Phosphate content in ppmTh_err: uncertainty of Phosphate measurementU: measured Phosphate content in ppmU_err: uncertainty of Phosphate measurement
Copyright Text: Timothy C. Kenna, Frank O. Nitsche, Cecilia McHugh, Long Island Sound Cable Fund Steering Committee