Metadata: Identification_Information: Citation: Citation_Information: Originator: Kira Mizell Originator: Isabelle M. Shapiro Publication_Date: 20250618 Title: X-ray diffraction data for the 0-2 cm horizons of marine sediment cores and a mineral concretion near waste barrels in the San Pedro Basin of the Southern California Borderland Geospatial_Data_Presentation_Form: comma-delimited text Series_Information: Series_Name: data release Issue_Identification: DOI: 10.5066/P1PZ48WA Publication_Information: Publication_Place: Pacific Coastal and Marine Science Center, Santa Cruz, California Publisher: U.S. Geological Survey Other_Citation_Details: Suggested Citation: Mizell, K. and Shapiro, I.M., 2025, X-ray diffraction data for the 0-2 cm horizons of marine sediment cores and a mineral concretion near waste barrels in the San Pedro Basin of the Southern California Borderland: U.S. Geological Survey data release, https://doi.org/10.5066/P1PZ48WA. Online_Linkage: https://doi.org/10.5066/P1PZ48WA Description: Abstract: Marine sediment push cores and one mineral concretion were collected near waste barrels in the San Pedro Basin of the Southern California Borderland in the Pacific Ocean using a remotely operated vehicle during the Schmidt Ocean Institute research cruise FK210726 onboard the R/V Falkor in 2021. Dried sediment samples of the 0-2 centimeter horizon of the cores and the mineral concretion were prepared at the USGS Pacific Coastal and Marine Science Center for powder x-ray diffraction analyses, and x-ray diffraction scan data are provided here. Location information (latitude, longitude, depth) for each sample are provided in each Attribute Definition of this metadata file. The x-ray diffraction work was funded by the U.S Geological Survey Pacific Coastal and Marine Science Center and ship time was funded by NOAA Office of Ocean Exploration and Research (grant number NA19OAR110305). Purpose: These data serve to expand the knowledge of seafloor sediments offshore Southern California in regions where waste dumping has occurred. Supplemental_Information: Additional information about the field activities from which these data were derived is available online at: https://cmgds.marine.usgs.gov/fan_info.php?fan=2021-637-FA Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20210726 Ending_Date: 20250215 Currentness_Reference: ground condition at the time data were collected Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -122.112342 East_Bounding_Coordinate: -117.200932 North_Bounding_Coordinate: 33.761558 South_Bounding_Coordinate: 32.248276 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: oceans Theme_Keyword: geoscientificInformation Theme: Theme_Keyword_Thesaurus: Data Categories for Marine Planning Theme_Keyword: Nonliving Resources Theme_Keyword: Physical/Chemical Features Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: X-ray diffraction Theme_Keyword: marine geology Theme_Keyword: chemical analysis Theme: Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords Theme_Keyword: basin Theme_Keyword: mineralogy Theme_Keyword: marine geology Theme_Keyword: sedimentology Theme_Keyword: coastal pollution Theme_Keyword: dump site Theme_Keyword: sedimentary waste disposal Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: Coastal and Marine Hazards and Resources Program Theme_Keyword: CMHRP Theme_Keyword: Pacific Coastal and Marine Science Center Theme_Keyword: PCMSC Theme_Keyword: Global Ocean Mineral Resources Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:6838f0c7d4be0259257472b1 Place: Place_Keyword_Thesaurus: Geographic Names Information System (GNIS) Place_Keyword: Pacific Ocean Place: Place_Keyword_Thesaurus: NGA GEOnet Names Server (GNS) Place_Keyword: Southern California Borderland Place_Keyword: San Pedro Basin Access_Constraints: No access constraints Use_Constraints: USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey as the originator of the dataset and in products derived from these data. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, Pacific Coastal and Marine Science Center Contact_Person: PCMSC Science Data Coordinator Contact_Address: Address_Type: mailing and physical Address: 2885 Mission Street City: Santa Cruz State_or_Province: CA Postal_Code: 95060 Contact_Voice_Telephone: 831-427-4747 Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov Native_Data_Set_Environment: Mac OS Ventura 13.7.4, Microsoft Excel 16.95.4 for Mac Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: X-ray diffraction data were tested for accuracy by intermittently analyzing a powdered quartz reference sample to verify the one hundred intensity peak at 26.6 degree two-theta. When the quartz peak was in the proper position, we infer that other measured peak positions in the sample are accurate. Peak intensities are considered semiquantitative since no quantitative standards were analyzed for this dataset. Logical_Consistency_Report: No formal logical accuracy tests were conducted. Completeness_Report: Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: A formal accuracy assessment of the horizontal positional information in the dataset has not been conducted. The horizontal accuracy was determined with the ship's GPS navigation, which is accurate to less than 5 m. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: A formal accuracy assessment of the vertical positional information in the dataset has not been conducted. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Levin, Lisa Publication_Date: 2021 Title: Event Logs from ROV SuBastian Dives conducted during R/V Falkor expedition FK210726 (2021) Online_Linkage: https://www.marine-geo.org/tools/files/30410#datasets Type_of_Source_Media: Marine Geoscience Data System Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20210726 Ending_Date: 20210805 Source_Currentness_Reference: ground condition at time samples were collected Source_Citation_Abbreviation: FK210726 cruise data Source_Contribution: Latitude, longitude, and depth information for FK210726 samples Process_Step: Process_Description: Push core samples and one mineral concretion sample were collected near waste barrels in San Pedro Basin of the Southern California Borderland in the Pacific Ocean onboard the R/V Falkor between July 26, 2021, and August 5, 2021, during the FK210726 research expedition. Push cores and the mineral concretion were recovered by the manipulator arm of ROV SubBastian. Process_Date: 20210805 Process_Step: Process_Description: On board ship, sediment cores were extruded and sliced into four 2 cm depth horizons. Aliquots of the 0-2 cm horizon were homogenized with alcohol-sterilized spatula and frozen at -20 degrees Celcius in Whirlpakÿbag. Process_Date: 20210805 Process_Step: Process_Description: On board ship, the mineral concretion was recovered from the ROV and stored in a plastic bag at room temperature. Process_Date: 20210805 Process_Step: Process_Description: At Scripps Institution of Oceanography, approximately 2 grams of the frozen 0-2 cm horizon sediment aliquots were thawed in a sterile petri dish and air-dried overnight in a sterile flow hood. The sediment was then homogenized with mortar and pestle and shipped to the USGS Pacific Coastal and Marine Science Center at ambient temperature. Process_Date: 20240615 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Johanna Gutleben Contact_Organization: Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California San Diego Contact_Position: postdoctoral researcher Contact_Address: Address_Type: mailing Address: Kaplan Lab, Room 201, 9500 Gilman Drive, Mail Code 0209 City: San Diego State_or_Province: CA Postal_Code: 92093-0209 Contact_Voice_Telephone: 858-534-7322 Contact_Electronic_Mail_Address: jgutleben@ucsd.edu Process_Step: Process_Description: At the USGS Marine Minerals Lab, the mineral concretion was rinsed with deionized water, air-dried overnight in a flow hood in a watch glass, and ground with a mortar and pestle to approximately 75 micrometer fineness. Process_Date: 20211010 Process_Step: Process_Description: At the USGS Pacific Coastal and Marine Science Center Marine Minerals Lab powdered sediment and mineral concretion samples were backloaded and tamped into sample holders and run in a Panalytical X Pert3 x-ray diffractometer (XRD; https://www.malvernpanalytical.com/) with Cu K-alpha radiation and graphite monochromator. XRD scans were collected using the following parameters: step size of 0.017 degrees two-theta between 5 and 70 degrees two-theta, power of 40 kilovolt and 45 milliampere, scan rate of 60 seconds per step, a sample holder rotational speed of 0.03 degrees per second, and averaged triplicate scans at three different stage wobble angles (-1, 0, and 1 degree). Process_Date: 20250319 Process_Step: Process_Description: X-ray diffraction scan data were combined into a comma-delimited text values document (FK210726_SCB_barrel_sediment_XRD_data.csv). Source_Used_Citation_Abbreviation: FK210726 cruise data Process_Date: 20250306 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Point Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Point Point_and_Vector_Object_Count: 3823 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.00000001 Longitude_Resolution: 0.0000001 Geographic_Coordinate_Units: Decimal degrees Geodetic_Model: Horizontal_Datum_Name: D_WGS_1984 Ellipsoid_Name: WGS_1984 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257222356 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: FK210726_SCB_barrel_sediment_XRD_data.csv Entity_Type_Definition: Comma-delimited file containing results from x-ray diffraction analyses of the 0-2 cm horizon of marine sediment core samples and one mineral concretion. Location information for the samples are included in each Attribute Definition of this metadata file and not the data table. The header for each column of diffraction data is a sample name. The sediment sample names follow the scheme of SCB, indicating Southern California Borderland, followed by a hyphen, followed by the push core ID and sediment horizon ID, which is represented by a combination of numbers and letters. The mineral concretion sample is simply labeled as such. Entity_Type_Definition_Source: Producer defined Attribute: Attribute_Label: Position_2theta Attribute_Definition: The two-theta angle at which the x-ray diffractometer measured the X-ray diffraction of the powdered sample Attribute_Definition_Source: instrument defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 5.0084 Range_Domain_Maximum: 69.9824 Attribute_Units_of_Measure: degrees Attribute_Measurement_Resolution: 0.0001 Attribute: Attribute_Label: SCB-274bA Attribute_Definition: X-ray diffraction intensity value at the two-theta angle listed in the corresponding row in the Position attribute. The location for sample SCB-274bA is 33.57358835, -118.4360591 and 900.61 m water depth. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 17.4747 Range_Domain_Maximum: 879.738 Attribute_Units_of_Measure: counts Attribute_Measurement_Resolution: 0.0001 Attribute: Attribute_Label: SCB-290cA Attribute_Definition: X-ray diffraction intensity value at the two-theta angle listed in the corresponding row in the Position attribute. The location for sample SCB-290cA is 33.56600101, -118.4242769 and 901.13 m water depth. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 16.5936 Range_Domain_Maximum: 922.0925 Attribute_Units_of_Measure: counts Attribute_Measurement_Resolution: 0.0001 Attribute: Attribute_Label: SCB-292bA Attribute_Definition: X-ray diffraction intensity value at the two-theta angle listed in the corresponding row in the Position attribute. The location for sample SCB-292bA is 33.56605059, -118.4242526 and 901.02 m water depth. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 19.5928 Range_Domain_Maximum: 733.6876 Attribute_Units_of_Measure: counts Attribute_Measurement_Resolution: 0.0001 Attribute: Attribute_Label: SCB-298cA Attribute_Definition: X-ray diffraction intensity value at the two-theta angle listed in the corresponding row in the Position attribute. The location for sample SCB-298cA is 33.56610603, -118.425657 and 901.29 m water depth. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 20.4561 Range_Domain_Maximum: 779.6876 Attribute_Units_of_Measure: counts Attribute_Measurement_Resolution: 0.0001 Attribute: Attribute_Label: SCB-300bA Attribute_Definition: X-ray diffraction intensity value at the two-theta angle listed in the corresponding row in the Position attribute. The location for sample SCB-300bA is 33.56610595, -118.425668 and 901.28 m water depth. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 18.8807 Range_Domain_Maximum: 736.5314 Attribute_Units_of_Measure: counts Attribute_Measurement_Resolution: 0.0001 Attribute: Attribute_Label: SCB-308cA Attribute_Definition: X-ray diffraction intensity value at the two-theta angle listed in the corresponding row in the Position attribute. The location for sample SCB-308cA is 33.56608822, -118.4269999 and 901.41 m water depth. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 15.2360 Range_Domain_Maximum: 903.9075 Attribute_Units_of_Measure: counts Attribute_Measurement_Resolution: 0.0001 Attribute: Attribute_Label: SCB-310bA Attribute_Definition: X-ray diffraction intensity value at the two-theta angle listed in the corresponding row in the Position attribute. The location for sample SCB-310bA is 33.56608617, -118.4269759 and 901.4 m water depth. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 20.6746 Range_Domain_Maximum: 746.6000 Attribute_Units_of_Measure: counts Attribute_Measurement_Resolution: 0.0001 Attribute: Attribute_Label: Barrel_3S_Mineral_Concretion Attribute_Definition: X-ray diffraction intensity value at the two-theta angle listed in the corresponding row in the Position attribute. The location for sample Barrel_3S_Mineral_Concretion is 33.56608617, -118.4269759 and 901.4 m water depth. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 21.3740 Range_Domain_Maximum: 1421.6797 Attribute_Units_of_Measure: counts Attribute_Measurement_Resolution: 0.0001 Overview_Description: Entity_and_Attribute_Overview: The first line of the csv file is a header line. Entity_and_Attribute_Detail_Citation: U.S. Geological Survey Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey - ScienceBase Contact_Address: Address_Type: mailing and physical Address: Denver Federal Center, Building 810, Mail Stop 302 City: Denver State_or_Province: CO Postal_Code: 80225 Contact_Voice_Telephone: 1-888-275-8747 Contact_Electronic_Mail_Address: sciencebase@usgs.gov Resource_Description: These data are available in .csv format contained in a single file. Distribution_Liability: Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by 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 constitute any such warranty. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: comma-delimited text Format_Version_Number: Microsoft Excel 16.16.17 for Mac Format_Information_Content: File contains table in .csv format File_Decompression_Technique: No compression applied Transfer_Size: 0.30187 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://www.sciencebase.gov/catalog/file/get/6838f0c7d4be0259257472b1 Network_Resource_Name: https://www.sciencebase.gov/catalog/item/6838f0c7d4be0259257472b1 Network_Resource_Name: https://doi.org/10.5066/P1PZ48WA Access_Instructions: Data can be downloaded using the Network_Resource_Name links. The first link is a direct link to download a zipped file of data and metadata. The second link points to a landing page with metadata and data. The third link points to the landing page for the entire data release. Fees: None. Technical_Prerequisites: These data can be viewed with Microsoft Excel or any text reader. Metadata_Reference_Information: Metadata_Date: 20250618 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, Pacific Coastal and Marine Science Center Contact_Person: PCMSC Science Data Coordinator Contact_Address: Address_Type: mailing and physical Address: 2885 Mission Street City: Santa Cruz State_or_Province: CA Postal_Code: 95060 Contact_Voice_Telephone: 831-427-4747 Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998