Identification_Information: Citation: Citation_Information: Originator: Nye, C.J. Originator: Scott, W.E. Originator: Neill, O.K. Originator: Waythomas, C.F. Originator: Cameron, C.E. Originator: Calvert, A.T. Publication_Date: 2017 Title: Geology of Kasatochi volcano, Aleutian Islands, Alaska Geospatial_Data_Presentation_Form: digital data Series_Information: Series_Name: Professional Report Issue_Identification: PR 123 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 127 p., 1 sheet, scale 1:5000 Online_Linkage: http://doi.org/10.14509/29718 Description: Abstract: Kasatochi is a small, isolated island volcano in the center of the Aleutian Island chain. It consists of a roughly circular cone approximately 3 km in diameter with a lake-filled central crater that is 1.2 km in diameter and extends from the highest point on the island to sea level. The oldest unit recognized is a thick series of mid-Pleistocene glaciovolcanic deposits consisting of autobrecciated lava, lahars, and volumetrically minor lava masses that we believe to have been emplaced underneath a regional ice cap. This unit is unconformably overlain by several massive Holocene lavas, above which lies a thick sequence of latest-Holocene pyroclastic deposits likely deposited during the crater-forming eruption. The 2008 eruption enlarged the preexisting crater, and produced pyroclastic density currents, surges, and fall that blanketed the entire island except for the crater wall and steep, seaward-facing cliffs on the flanks. 2008 deposits initially extended the shoreline seaward by up to 500 m. A multidisciplinary effort to document recovery of the ecosystem was initiated, and this study of the geology of the island was undertaken as part of that effort. This collection of electronic data is a supplement to the Geology of Kasatochi volcano, Aleutian Islands report and geologic map. It provides spreadsheets of sample metadata and major and trace element XRF and ICP/MS data which are included in the appendices; electron microprobe mineral analyses which are discussed in the report, but not tabulated elsewhere; and high resolution versions of panoramic photographs (appendix 1) and photomicrographs (appendix 7). Purpose: Kasatochi volcano is located at the intersection of the flat, shallow Aleutian platform and the Bering slope rise, an area of high biologic productivity. As a result, the island hosts a large sea lion colony and nesting sites for hundreds of thousands of seabirds. A large eruption in 2008 blanketed the island in pyroclastic deposits, covering nesting sites and almost all existing vegetation. A multidisciplinary effort to document recovery of the ecosystem was initiated, and this study of the geology of the island was undertaken as part of that effort. This study is the first to document the geology of the entire island, and presents a snapshot of the island early in its response to the 2008 eruption. Supplemental_Information: >E1_full_resolution_panoramas: Full resolution versions of panoramic photographs in appendix 1. >E3_sample_metadata: Sample locations and descriptions. >E5_whole_rock_compositions: Major and trace element analyses of rocks and mineral separates. >E6_modal_data: Point count data for phenocrysts and groundmass. >E7_photomicrographs: Full resolution versions of photomicrographs in appendix 7. >E8_microprobe_data: Electron microprobe analyses of minerals. >E9_componentry_08j: Grain size distribution of 2008 pyroclastic deposits. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 2008 Ending_Date: 2017 Currentness_Reference: ground condition Status: Progress: complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -175.535309 East_Bounding_Coordinate: -175.488612 North_Bounding_Coordinate: 52.186087 South_Bounding_Coordinate: 52.155502 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Theme: Theme_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Theme_Keyword: Active Volcanoes Theme_Keyword: Age Dates Theme_Keyword: Aleutian Arc Theme_Keyword: Alluvial Deposits Theme_Keyword: Analyses Theme_Keyword: Analyses and Sampling Theme_Keyword: Basalt Theme_Keyword: Bedrock Theme_Keyword: Bedrock Geology Theme_Keyword: Caldera Theme_Keyword: Chemistry Theme_Keyword: Colluvium Theme_Keyword: Erosion Theme_Keyword: Fan Theme_Keyword: Geochemical Data Theme_Keyword: Geochemistry Theme_Keyword: Geochronology Theme_Keyword: Geologic Theme_Keyword: Geological Process Theme_Keyword: Geologic Hazards Theme_Keyword: Geologic Map Theme_Keyword: Geology Theme_Keyword: Geomorphology Theme_Keyword: Hazards Theme_Keyword: Historic Eruption Theme_Keyword: Igneous Theme_Keyword: Lava Flow Theme_Keyword: Mineralogy Theme_Keyword: Petrographic Theme_Keyword: Petrography Theme_Keyword: Petrology Theme_Keyword: Pumice Theme_Keyword: Pyroclastics Theme_Keyword: Rockfall Theme_Keyword: Rocks Theme_Keyword: Sample Location Theme_Keyword: Slope Instability Theme_Keyword: Slump Theme_Keyword: Soils Theme_Keyword: Surface Theme_Keyword: Surficial Theme_Keyword: Talus Theme_Keyword: Tephra Theme_Keyword: Topography Theme_Keyword: Ultramafic Theme_Keyword: Uplift Theme_Keyword: Volcanic Theme_Keyword: Volcanic Ash Theme_Keyword: Volcanic Eruption Theme_Keyword: Volcaniclastics Theme_Keyword: Volcanic Rocks Theme_Keyword: Volcanoes Theme_Keyword: Volcanology Place: Place_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Place_Keyword: Aleutian Islands Place_Keyword: Kasatochi Temporal: Temporal_Keyword_Thesaurus: Walker, J.D., Geissman, J.W., Bowring, S.A, and Babcock, L.E., comp., 2012, Geologic Time Scale v. 4.0: Geological Society of America Temporal_Keyword: Cenozoic Temporal_Keyword: Holocene Temporal_Keyword: Quaternary Access_Constraints: This report, map, and/or dataset is available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below). Use_Constraints: Any hard copies or published datasets utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, the user is obligated to describe the types of modifications the user has made. The user specifically agrees not to misrepresent these datasets, nor to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. The State of Alaska makes no express or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Alaska Division of Geological & Geophysical Surveys Contact_Position: Metadata Manager Contact_Address: Address_Type: mailing and physical Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: (907)451-5039 Contact_Facsimile_Telephone: (907)451-5050 Contact_Electronic_Mail_Address: dggspubs@alaska.gov Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays Data_Set_Credit: Initial fieldwork was supported by the North Pacific Research Board (Project number: 923), the U.S. Fish and Wildlife Service, the Alaska Volcano Observatory, and the U.S. Geological Survey. Additional fieldwork was supported by AVO and the USFWS. We thank USFWS for continued encouragement and support. We especially thank Jeff Williams of the USFWS for sharing his deep knowledge of Kasatochi history, biology, and geography, and for his all-encompassing interest in Kasatochi science. Fieldwork was supported by the M/V Tiglax, under the able command of Captain Billy Pepper; we thank the captain and crew for comfortable and safe transport. We thank pilots Burke Mees, Jerry Morris, and Roger Clifford for taking and sharing oblique aerial photographs. Post-eruption scientific studies span a large range of biologic and geologic disciplines, and we thank the other scientists for rewarding and fruitful cross-fertilization. Chris Nye thanks Patricia Gallagher for help with ArcGIS during preparation of the map draft and for final cartography, and Nicole Kinsman for help with establishing the Kasatochi Mean Sea Level datum. Reviews by Brian Jicha and especially Michael Clynne substantially improved the report. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the State of Alaska or U.S. Government. Cross_Reference: Citation_Information: Originator: Nye, Chris Publication_Date: 2017 Title: Kasatochi Island 2009 topography Series_Information: Series_Name: Miscellaneous Publication Issue_Identification: MP 163 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 1 sheet Online_Linkage: http://doi.org/10.14509/29733 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: This DGGS Professional Report is a final report of scientific research. Several scientists familiar with the subject matter provided technical reviews. Uncertainties associated with the depiction or interpretation of various features are discussed in the manuscript. Logical_Consistency_Report: not applicable Completeness_Report: This data release is complete. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Locations were recorded using handheld GPS devices. Location errors reported by the GPS were not recorded. Lineage: Process_Step: Process_Description: Field data collection - Geologic field mapping and sampling were conducted during short trips on 18 days-nominally 2 to 3 days in mid-June and mid- to late-August-from 2009 through 2013. In addition to other field observations, we captured high-resolution panoramic photographs of the island flanks taken from offshore and of the crater wall taken from the rim. Process_Date: 2013 Process_Step: Process_Description: Rock sample analysis - More than 110 rock samples were collected during the course of mapping. One hundred one of these samples were analyzed for major and trace elements by the Peter Hooper GeoAnalytical Lab at Washington State University. Detailed petrographic descriptions and 1,000-point modes were made using thin sections of 67 of the samples. Electron probe microanalysis (EPMA) at the Advanced Instrumentation Laboratory at the University of Alaska Fairbanks produced 3,364 mineral analyses, including core-rim pairs from 1,385 grains, from 24 representative samples, spanning all lithologic units. In addition, 40Ar/39Ar ages were obtained for three samples by the USGS, Menlo Park, California. Process_Date: 2015 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: point Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.00001 Longitude_Resolution: 0.00001 Geographic_Coordinate_Units: decimal degrees Geodetic_Model: Horizontal_Datum_Name: World Geodetic System of 1984 Ellipsoid_Name: WGS 84 Semi-major_Axis: 6378137 Denominator_of_Flattening_Ratio: 298.257223563000025 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: E1_full_resolution_panoramas Entity_Type_Label: pr123-E1_full_resolution_panoramas Entity_Type_Definition: Full resolution versions of panoramic photographs in appendix 1. Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys (DGGS) and Alaska Volcano Observatory Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: E3_sample_metadata Entity_Type_Label: pr123-E3_sample_metadata Entity_Type_Definition: Sample locations and descriptions. Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys (DGGS) and Alaska Volcano Observatory Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: E5_whole_rock_compositions Entity_Type_Label: pr123-E5_whole_rock_compositions Entity_Type_Definition: Major and trace element analyses of rocks and mineral separates. Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys (DGGS) and Alaska Volcano Observatory Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: E6_modal_data Entity_Type_Label: pr123-E6_modal_data Entity_Type_Definition: Point count data for phenocrysts and groundmass. Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys (DGGS) and Alaska Volcano Observatory Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: E7_photomicrographs Entity_Type_Label: pr123-E7_photomicrographs Entity_Type_Definition: Full resolution versions of photomicrographs in appendix 7. Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys (DGGS) and Alaska Volcano Observatory Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: E8_microprobe_data Entity_Type_Label: pr123-E8_microprobe_data Entity_Type_Definition: Electron microprobe analyses of minerals. Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys (DGGS) and Alaska Volcano Observatory Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: E9_componentry_08j Entity_Type_Label: pr123-E9_componentry_08j Entity_Type_Definition: Grain size distribution of 2008 pyroclastic deposits. Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys (DGGS) and Alaska Volcano Observatory Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: Alaska Division of Geological & Geophysical Surveys Contact_Position: Metadata Manager Contact_Address: Address_Type: mailing and physical Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: (907)451-5039 Contact_Facsimile_Telephone: (907)451-5050 Contact_Electronic_Mail_Address: dggspubs@alaska.gov Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays Resource_Description: PR 123 Distribution_Liability: The State of Alaska makes no expressed or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product. Standard_Order_Process: Non-digital_Form: DGGS publications are available as free online downloads or you may purchase paper hard-copies or digital files on CD/DVD or other digital storage media by mail, phone, fax, or email from the DGGS Fairbanks office. To purchase this or other printed reports and maps, contact DGGS by phone (907-451-5020), e-mail (dggspubs@alaska.gov), or fax (907-451-5050). Payment accepted: Cash, check, money order, VISA, or MasterCard. Turnaround time is 1-2 weeks unless special arrangements are made and an express fee is paid. 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Fees: Contact DGGS for current pricing Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: digital data Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://doi.org/10.14509/29718 Fees: Free download Metadata_Reference_Information: Metadata_Date: 20170808 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Alaska Division of Geological & Geophysical Surveys Contact_Position: Metadata Manager Contact_Address: Address_Type: mailing and physical Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: (907)451-5039 Contact_Facsimile_Telephone: (907)451-5050 Contact_Electronic_Mail_Address: dggspubs@alaska.gov Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Use_Constraints: If the user has modified the data in any way they are obligated to describe the types of modifications they have performed in the supporting metadata file. User specifically agrees not to imply that changes they made were approved by the Alaska Department of Natural Resources or Division of Geological & Geophysical Surveys. Metadata_Extensions: Online_Linkage: http://www.dggs.alaska.gov/metadata/dggs.ext Profile_Name: dggs metadata extensions