Metadata: Identification_Information: Citation: Citation_Information: Originator: Marci E. Marot Publication_Date: 20170315 Title: Radiochemistry Data from Sediment Cores Collected in March 2012 Along the Northern Chandeleur Islands, Louisiana (U.S. Geological Survey Field Activity Numbers 12BIM01) Geospatial_Data_Presentation_Form: tabular digital data Series_Information: Series_Name: U.S. Geological Survey Data Series Issue_Identification: 1045 Larger_Work_Citation: Citation_Information: Originator: Marci E. Marot Originator: C. Scott Adams Originator: Kathyrn A. Richwine Originator: Christopher G. Smith Publication_Date: 20170315 Title: Sediment Lithology and Radiochemistry from the Back-Barrier Environments Along the Chandeleur Islands, Louisiana: March 2012 Edition: 1.0 Geospatial_Data_Presentation_Form: multimedia presentation Series_Information: Series_Name: U.S. Geological Survey Data Series Issue_Identification: 1045 Publication_Information: Publication_Place: St. Petersburg, Florida Publisher: U.S. Geological Survey St. Petersburg Coastal and Marine Science Center Online_Linkage: https://doi.org/10.3133/ds1045 Description: Abstract: Scientists from the U.S. Geological Survey (USGS), St. Petersburg Coastal and Marine Science Center collected a set of sediment cores from the back-barrier environments along the Chandeleur Islands, Louisiana, in March 2012. The sampling efforts were part of a larger USGS study to evaluate effects on the geomorphology of the Chandeleur Islands following the construction of an artificial sand berm to reduce oil transport onto federally managed lands. The objective of this study was to evaluate the response of the back-barrier tidal and wetland environments to the berm. This report serves as an archive for sedimentological and radiochemical data derived from the sediment cores. The data described in this report is available for download. Purpose: The Radiochemistry_Data.xlsx file includes all radiochemistry analysis results from back-barrier wetlands collected on the Chandeleur Islands, Louisiana from March 2012 by the USGS St. Petersburg Coastal and Marine Science Center. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20120324 Ending_Date: 20120326 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -88.835832 East_Bounding_Coordinate: -88.825012 North_Bounding_Coordinate: 29.969498 South_Bounding_Coordinate: 29.895495 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:91065f46-96d0-4eeb-9b30-6eae78229863 Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Theme_Keyword: biota Theme_Keyword: oceans Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: geology Theme_Keyword: geochemistry Theme_Keyword: unconsolidated deposits Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: back-barrier Theme_Keyword: estuaries Theme_Keyword: wetland Theme_Keyword: sediment Theme_Keyword: core Theme_Keyword: radiochemistry Theme_Keyword: gamma spectroscopy Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: U.S. Geological Survey St. Petersburg Coastal and Marine Science Center Place: Place_Keyword_Thesaurus: Geographic Names Information System (GNIS) Place_Keyword: Louisiana Place_Keyword: Gulf of Mexico Place_Keyword: Chandeleur Islands Stratum: Stratum_Keyword_Thesaurus: None Stratum_Keyword: sediment Stratum_Keyword: subsurface Temporal: Temporal_Keyword_Thesaurus: None Temporal_Keyword: March 2012 Access_Constraints: None Use_Constraints: The U.S. Geological Survey requests that it be referenced as the originator of this dataset in any future products or research derived from these data. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey St. Petersburg Coastal and Marine Science Center Contact_Person: Marci E. Marot Contact_Position: Geologist Contact_Address: Address_Type: Mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: US Contact_Voice_Telephone: (727) 502-8000 Contact_Electronic_Mail_Address: mmarot@usgs.gov Data_Set_Credit: U.S. Geological Survey Native_Data_Set_Environment: Microsoft Windows 7 Enterprise Service Pack 1; Microsoft Excel Version 2010 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: The radioisotopic activities reported in the Excel spreadsheets include the counting error for all samples. The critical level is reported for each core set. Logical_Consistency_Report: The data include sample depth interval in core (cm), date of collection, initial vs. aged count, Be-7 activity and error, Be-7 inventory and error, Cs-137 activity and error, Pb-210 activity and error, Ra-226 activity and error, Th-234 activity and error, K-40 activity and error. Completeness_Report: This is a complete processed radiochemistry data file for the USGS FAN 12BIM01. Lineage: Process_Step: Process_Description: At each of the seven sample sites, a 10.2-centimeter (cm) diameter push core was collected. Eight sediment push cores were collected, in total, with core lengths varying between 45.5 and 70 cm. Accurate position and elevation data were obtained at all sampling locations with an Ashtech Differential Global Positioning System (DGPS) receiver and antenna with occupation times of 30 minutes. The accuracy of both horizontal position and elevation were improved by post-processing the DGPS data using a local benchmark, which was occupied throughout the course of each field activity by a similar DGPS system. In the field, the cores were sectioned at 2-cm intervals to a depth of 10–16 cm, placed in individual storage bags, and stored on ice. The only exception was the back-barrier marsh cores collected in March 2012 (12BIM01-M) that were subsampled at 1 cm intervals. The section core samples were transported to the USGS SPCMSC. Process_Date: 2012 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey St. Petersburg Coastal and Marine Science Center Contact_Person: Marci E. Marot Contact_Position: Geologist Contact_Address: Address_Type: Mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: U.S. Contact_Voice_Telephone: (727) 502-8000 Contact_Electronic_Mail_Address: mmarot@usgs.gov Process_Step: Process_Description: Each subsample (approximately 80 g of wet sediment) was oven-dried at 60 degrees Celsius (°C) for 48 hours. The dried sediment was homogenized to a fine powder using a porcelain mortar and pestle. Dried ground sediments (15–30 g) were sealed in airtight polypropylene containers. The sample weights and counting container geometries were matched to pre-made calibration standards. The sealed samples were allowed to sit for a minimum of 3 weeks to allow Ra-226 to come into secular equilibrium with its daughter isotopes Pb-214 and Bi-214. The sealed samples were then counted for 48-72 hours on a planar-style, low energy, high purity germanium, gamma-ray spectrometer. Sample count rates were corrected for detector efficiency (referenced to the International Atomic Energy Agency RGU-1 standard), standard photopeak intensity, and self-absorption corrections using a U-238 sealed source. Samples collected in March and July 2012 (12BIM01, 12BIM02) were kept in their sealed counting containers for a minimum of five months following their initial count to allow for the decay of unsupported Th-234. The aged samples were recounted. Process_Date: 2012 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey St. Petersburg Coastal and Marine Science Center Contact_Person: Marci E. Marot Contact_Position: Geologist Contact_Address: Address_Type: Mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: U.S. Contact_Voice_Telephone: (727) 502-8000 Contact_Electronic_Mail_Address: mmarot@usgs.gov Process_Step: Process_Description: Added keywords section with USGS persistent identifier as theme keyword. Process_Date: 20201013 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: VeeAnn A. Cross Contact_Position: Marine Geologist Contact_Address: Address_Type: Mailing and Physical Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: 508-548-8700 x2251 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: vatnipp@usgs.gov Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: Radiochemistry_Data.xlxs Entity_Type_Definition: Gamma spectroscopy radiochemistry results of sediment push cores collected on the Chandeleur Islands, Louisiana. Entity_Type_Definition_Source: USGS Attribute: Attribute_Label: Core ID Attribute_Definition: Back-barrier or marsh sediment core site number Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: Core site identification number assigned by USGS scientist Attribute: Attribute_Label: Depth (cm) Attribute_Definition: Sample interval depth measured from top of the core (cm) Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 16 Attribute: Attribute_Label: Be-7 (pCi/g) Attribute_Definition: Beryllium-7 specific activity measured in picocuries per gram of dry sediment at the date of field collection. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: Not detected Range_Domain_Maximum: 0.67 Attribute: Attribute_Label: Be-7 Error (+/- pCi/g) Attribute_Definition: Beryllium-7 specific activity counting error measured in picocuries per gram of dry sediment at the date of field collection. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: Null Range_Domain_Maximum: 0.45 Attribute: Attribute_Label: Cs-137 (pCi/g) Attribute_Definition: Cesium-137 specific activity measured in picocuries per gram of dry sediment at the date of field collection. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: Not detected Range_Domain_Maximum: 0.33 Attribute: Attribute_Label: Cs-137 Error (+/- pCi/g) Attribute_Definition: Cesium-137 specific activity counting error measured in picocuries per gram of dry sediment at the date of field collection. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: Null Range_Domain_Maximum: 0.05 Attribute: Attribute_Label: Pb-210 (pCi/g) Attribute_Definition: Lead-210 specific activity measured in picocuries per gram of dry sediment at the date of field collection. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.26 Range_Domain_Maximum: 1.87 Attribute: Attribute_Label: Pb-210 Error (+/- pCi/g) Attribute_Definition: Lead-210 specific activity counting error measured in picocuries per gram of dry sediment at the date of field collection. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.06 Range_Domain_Maximum: 0.25 Attribute: Attribute_Label: Ra-226 (pCi/g) Attribute_Definition: Radium-226 specific activity measured in picocuries per gram of dry sediment at the date of field collection. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.25 Range_Domain_Maximum: 0.84 Attribute: Attribute_Label: Ra-226 Error (+/- pCi/g) Attribute_Definition: Radium-226 specific activity counting error measured in picocuries per gram of dry sediment at the date of field collection. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.02 Range_Domain_Maximum: 0.09 Attribute: Attribute_Label: Th-234 (pCi/g) Attribute_Definition: Thorium-234 specific activity measured in picocuries per gram of dry sediment at the date of field collection. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.27 Range_Domain_Maximum: 3.68 Attribute: Attribute_Label: Th-234 Error (+/- pCi/g) Attribute_Definition: Thorium-234 specific activity counting error measured in picocuries per gram of dry sediment at the date of field collection. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.07 Range_Domain_Maximum: 0.34 Attribute: Attribute_Label: K-40 (pCi/g) Attribute_Definition: Potassium-40 specific activity measured in picocuries per gram of dry sediment at the date of field collection. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 7.59 Range_Domain_Maximum: 17.72 Attribute: Attribute_Label: K-40 Error (+/- pCi/g) Attribute_Definition: Potassium-40 specific activity counting error measured in picocuries per gram of dry sediment at the date of field collection. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.47 Range_Domain_Maximum: 1.94 Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey St. Petersburg Coastal and Marine Science Center Contact_Person: Marci E. Marot Contact_Address: Address_Type: Mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: U.S. Contact_Voice_Telephone: 502-8000 Contact_Electronic_Mail_Address: mmarot@usgs.gov Resource_Description: Downloadable data Distribution_Liability: Although these data have been processed successfully on a computer system at the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution imply any such warranty. The USGS or U.S. Government shall not be held liable for improper or incorrect use of the data described and (or) contained herein. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: Microsoft Excel Format_Version_Number: 2010 Transfer_Size: 0.077 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://pubs.usgs.gov/ds/1045/downloads/Radiochemistry_Data.xlsx Fees: none Technical_Prerequisites: The spreadsheets included in this workbook were created for use with Microsoft Excel 2010. It may also be viewed with the Microsoft Excel viewer or by downloading a Microsoft Compatibility Pack to view with older versions of Microsoft Excel. Metadata_Reference_Information: Metadata_Date: 20201013 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey St. Petersburg Coastal and Marine Science Center Contact_Person: Marci E. Marot Contact_Position: Geologist Contact_Address: Address_Type: Mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: U.S. Contact_Voice_Telephone: (727) 502-8000 Contact_Electronic_Mail_Address: mmarot@usgs.gov Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Access_Constraints: none Metadata_Security_Information: Metadata_Security_Classification_System: None Metadata_Security_Classification: Unclassified Metadata_Security_Handling_Description: None