Identification_Information: Citation: Citation_Information: Originator: Marci E. Marot Originator: Christopher G. Smith Originator: U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center Publication_Date: 20131201 Title: Chandeleur Islands radiochemistry data from USGS field activities 12BIM01, 12BIM02, and 12BIM05 Geospatial_Data_Presentation_Form: tabular digital data Series_Information: Series_Name: U.S. Geological Survey Open-File Report Issue_Identification: 2014-1079 Online_Linkage: http://dx.doi.org/10.3133/ofr20141079/images/Tables/radiochemistry_data.zip Larger_Work_Citation: Citation_Information: Originator: Marci E. Marot Originator: C. Scott Adams Originator: Kathyrn A. Richwine Originator: Christopher G. Smith Originator: Lisa E. Osterman Publication_Date: 20131201 Title: Temporal Changes in Lithology and Radiochemistry from the Back-barrier Environments along the Chandeleur Islands, Louisiana: March 2012–July 2013 Edition: 1.0 Geospatial_Data_Presentation_Form: multimedia presentation Series_Information: Series_Name: U.S. Geological Survey Open-File Report Issue_Identification: 2014-1079 Publication_Information: Publication_Place: St. Petersburg, Florida Publisher: U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center Online_Linkage: http://dx.doi.org/10.3133/ofr20141079 Description: Abstract: Scientists from the U.S. Geological Survey (USGS), St. Petersburg Coastal and Marine Science Center (SPCMSC) conducted a time-series collection of shallow sediment cores from the back-barrier environments along the Chandeleur Islands, Louisiana from March 2012 through July 2013. The sampling efforts were part of a larger USGS study to evaluate the effects on the geomorphology of the Chandeleur Islands following the construction of an artificial sand berm in response to the Deep Water Horizon oil spill. 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, radiochemical, and microbiological data derived from the sediment cores. Data is available for a time-series of four sampling periods: March 2012, July 2013, September 2012, and July 2013. Data is available in downloadable spreadsheet, Joint Photographic Experts Group and Portable Document File formats. Additional files included: ArcGIS shape files of the study sites, detailed results of sediment grain size analyses, and formal Federal Geographic Data Committee (FDGC) metadata. Purpose: The Radiochemistry_Data.zip file includes all radiochemistry analysis results from back-barrier wetlands collected on or around the Chandeleur Islands, Louisiana from March 2012 to July 2013 by the U.S. Geological Survey (USGS), St. Petersburg Coastal and Marine Science Center. Supplemental_Information: This publication contains data for each of three field activities that were conducted in 2012: 12BIM01 March 24–26, 12BIM02 July 10, and 12BIM05 September 10. As part of this project, sediment cores were also collected July 15–17, 2013 (13BIM06) but radiochemical analyses were not performed on that sample set. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20120324 Ending_Date: 20120910 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: None Theme_Keyword: back-barrier 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 Temporal_Keyword: July 2012 Temporal_Keyword: September 2012 Access_Constraints: none 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) 502-8057 Contact_Electronic_Mail_Address: mmarot@usgs.gov Data_Set_Credit: U.S. Geological Survey Native_Data_Set_Environment: Microsoft Windows Server 2008 R2 Version 6.1 (Build 7601) Service Pack 1; Microsoft Excel Version 2010 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. 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 12BIM01, 12BIM02, and 12BIM05 core time series archive. Lineage: Process_Step: Process_Description: 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) 502-8057 Contact_Electronic_Mail_Address: mmarot@usgs.gov Process_Step: Process_Description: Each subsample (approximately 80 g of wet sediment) was oven-dried at 60°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 IAEA 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 5 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) 502-8057 Contact_Electronic_Mail_Address: mmarot@usgs.gov Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: 12BIM**-^^ Radiochemistry Data.xlxs (** is the field activity number during 2012, ranging from 01 to 05, and ^^ is the site location type, where B are back-barrier sites and M are tidal marsh sites) 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: Date Collected Attribute_Definition: The calendar date that the core was collected in the field. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 20120324 Range_Domain_Maximum: 20130910 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: Initial/Aged Attribute_Definition: Identifies whether the data is from the initial gamma spectroscopy analysis or whether the sample had been re-analyzed after a minimum of 5 months Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: I (Initial) Range_Domain_Maximum: A (Aged) Attribute: Attribute_Label: Be-7 Activity (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: 1.52 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: Be-7 Inventory (pCi/cm^2) Attribute_Definition: Beryllium-7 activity inventory measured in picocuries per square centimeter 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: 3.92 Attribute: Attribute_Label: Be-7 Invetory Error (+/- pCi/cm^2) Attribute_Definition: Beryllium-7 activity inventory error measured in picocuries per square centimeter 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: 0.55 Attribute: Attribute_Label: Cs-137 Activity (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: 0.20 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: 0.03 Attribute: Attribute_Label: Pb-210 Activity (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: 0.39 Range_Domain_Maximum: 2.07 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 Activity (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: 0.33 Range_Domain_Maximum: 0.90 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 Activity (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: 0.41 Range_Domain_Maximum: 1.59 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: 0.08 Range_Domain_Maximum: 0.29 Attribute: Attribute_Label: K-40 Activity (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: 10.92 Range_Domain_Maximum: 18.71 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: 2.44 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: 502-8057 Contact_Electronic_Mail_Address: mmarot@usgs.gov Distribution_Liability: This publication was prepared by an agency of the United States Government. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, nor shall the act of distribution imply any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and (or) contained herein. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Standard_Order_Process: Fees: none Digital_Form: Digital_Transfer_Information: Format_Name: Zip archive Format_Version_Number: 1 Format_Specification: .zip Transfer_Size: 131 KB Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://dx.doi.org/10.3133/ofr20141079/images/tables/Radiochemistry_Data.zip Resource_Description: Downloadable data Custom_Order_Process: none Technical_Prerequisites: These spreadsheets included in this .zip file 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: 20131215 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) 502-8057 Contact_Electronic_Mail_Address: mmarot@usgs.gov Metadata_Standard_Name: FGDC 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 Metadata_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.