USGS researcher collecting samples in Kanuti, Alaska. The samples collected in this location were more resistant to weathering than the surrounding rock indicating a change in lithology.
Erin Todd, Ph.D.
Igneous petrology and isotope geochemistry, with particular emphasis on the origin and evolution of melts associated with subduction zones.
Professional Experience
2012 - Present Research Geologist, USGS Alaska Science Center, Anchorage, Alaska
2011 - 2012 Postdoctoral Research Associate, WWU - University of Münster
2005 - 2011 Research and Teaching Assistant, University of California, Santa Cruz, CA
Education and Certifications
Ph.D. 2011 University of California, Santa Cruz, CA Earth Sciences
M.S. 2005 Northern Arizona University, Flagstaff, AZ Geology
B.S. 1999 University of Florida, Gainesville, FL Geology
Affiliations and Memberships*
American Geophysical Union
Geochemical Society
Geological Society of America
InterRIDGE
Science and Products
Understanding PGE, Cr, Ni and Cu Potential in Ophiolitic Rocks in Alaska
Metallogeny and Tectonics of the Lake Clark and Neacola Mountains Region, South-central Alaska
U-Pb Ages, Hafnium Isotope Ratios, and Trace Element Concentrations by Laser-ablation Split Stream (LASS) Analysis of Igneous and Metamorphic Zircons from the Yukon-Tanana Upland, Eastern Alaska
U-Pb Ages, Hafnium Isotope Ratios, and Trace Element Concentrations by Laser-Ablation Split Stream (LASS) Analysis of Igneous Zircons from the Western Alaska Range
Uranium-Lead Ages, Hafnium Isotope Ratios, and Trace Element Concentrations by Laser-Ablation Split Stream (LASS) Analysis of Igneous Zircons from the Darby Mountains Area, Seward Peninsula, Alaska
Whole Rock Major and Trace Element Chemistry for Igneous and Metamorphic Rocks from the Yukon-Tanana Upland, Alaska
Whole Rock Major and Trace Element Chemistry for Igneous Rocks from Tyonek, Lime Hills, Talkeetna, McGrath, and Lake Clark Quadrangles, Western Alaska Range, Alaska
Whole Rock Major and Trace Element Chemistry for Igneous and Sedimentary Rocks from the Western Alaska Range, Alaska
U-Pb Isotopic Data and Ages of Zircon and Titanite from Rocks from the Western Alaska Range, Northern Aleutian Range, Taylor Mountains, and Tikchik Mountains Regions, Alaska
USGS researcher collecting samples in Kanuti, Alaska. The samples collected in this location were more resistant to weathering than the surrounding rock indicating a change in lithology.
USGS researcher making observations and recording information on the outcrop of the Kanuti Ophiolite in Alaska. The Kanuti ophiolite is a mafic-ultramafic thrust sheet of probable Jurassic age, formerly considered to be the upper part of the Yukon-Koyukuk ophiolite (Angayucham terrane).
USGS researcher making observations and recording information on the outcrop of the Kanuti Ophiolite in Alaska. The Kanuti ophiolite is a mafic-ultramafic thrust sheet of probable Jurassic age, formerly considered to be the upper part of the Yukon-Koyukuk ophiolite (Angayucham terrane).
USGS researcher collecting one more sample while waiting for the helicopter in Kanuti, Alaska. The Kanuti ophiolite is a mafic-ultramafic thrust sheet of probable Jurassic age, formerly considered to be the upper part of the Yukon-Koyukuk ophiolite (Angayucham terrane).
USGS researcher collecting one more sample while waiting for the helicopter in Kanuti, Alaska. The Kanuti ophiolite is a mafic-ultramafic thrust sheet of probable Jurassic age, formerly considered to be the upper part of the Yukon-Koyukuk ophiolite (Angayucham terrane).
Variation of weathering and lichen growth on the rock surface reveals veins and segregated zones with different mineralogy.
Variation of weathering and lichen growth on the rock surface reveals veins and segregated zones with different mineralogy.
The photo was taken by Erin Todd during helicopter-supported geologic fieldwork in Lake Clark National Park this past summer.
The photo was taken by Erin Todd during helicopter-supported geologic fieldwork in Lake Clark National Park this past summer.
USGS research geologist Jamey Jones collects multiple samples of rocks exposed in a glacial stream valley near Lake Clark.
USGS research geologist Jamey Jones collects multiple samples of rocks exposed in a glacial stream valley near Lake Clark.
USGS research geologist Jamey Jones stands on a dike of granite intruding darker granodiorite, with helicopter in background.
USGS research geologist Jamey Jones stands on a dike of granite intruding darker granodiorite, with helicopter in background.
USGS research geologists Richard Lease (left) and Jamey Jones (right) take notes and collect samples of fine-grained metamorphic rock hosted as an inclusion in coarser-grained granodiorite.
USGS research geologists Richard Lease (left) and Jamey Jones (right) take notes and collect samples of fine-grained metamorphic rock hosted as an inclusion in coarser-grained granodiorite.
USGS research geologists Jamey Jones (left) and Richard Lease (right) make observations of rock units revealed by the glacier below.
USGS research geologists Jamey Jones (left) and Richard Lease (right) make observations of rock units revealed by the glacier below.
Molybdenite mineral coating on a fractured surface in Tertiary granite north of Lake Clark
Molybdenite mineral coating on a fractured surface in Tertiary granite north of Lake Clark
USGS research geologists Jamey Jones (left) and Erin Todd (right) discuss the "big picture" geology in their project area in and around Lake Clark National Park. Redoubt volcano in background left; baseball-sized cobbles on ground at researchers feet are pumice cobbles from the 2009(?) eruption of Redoubt volcano.
USGS research geologists Jamey Jones (left) and Erin Todd (right) discuss the "big picture" geology in their project area in and around Lake Clark National Park. Redoubt volcano in background left; baseball-sized cobbles on ground at researchers feet are pumice cobbles from the 2009(?) eruption of Redoubt volcano.
Jamey Jones collects a sample of Talkeenta Formation volcaniclastic sandstone for detrital zircon geochronology.
Jamey Jones collects a sample of Talkeenta Formation volcaniclastic sandstone for detrital zircon geochronology.
USGS researcher Jonathan Caine measures vein orientation at an outcrop of late Cretaceous pluton in Lake Clark National Park.
USGS researcher Jonathan Caine measures vein orientation at an outcrop of late Cretaceous pluton in Lake Clark National Park.
Cross-cutting relationships of at least 4 different phases of rock and high-temperature silicate fluids in a sample from the Lake Clark area.
Cross-cutting relationships of at least 4 different phases of rock and high-temperature silicate fluids in a sample from the Lake Clark area.
Detrital zircons and the magmatic history of Viti Levu, Fiji
Chemical geodynamics insights from a machine learning approach
Juvenile continental crust evolution in a modern oceanic arc setting: Petrogenesis of Cenozoic felsic plutons in Fiji, SW Pacific
Breaking up is hard to do: Magmatism during oceanic arc breakup, subduction reversal, and cessation
Sr, Nd, Hf and Pb isotope geochemistry of Early Miocene shoshonitic lavas from the South Fiji Basin: Note
Cretaceous to Oligocene magmatic and tectonic evolution of the western Alaska Range: Insights from U-Pb and 40Ar/39Ar geochronology
Basalt geochemistry and mantle flow during early backarc basin evolution: Havre Trough and Kermadec Arc, southwest Pacific
Links between tectonics, magmatism, and mineralization in the formation of Late Cretaceous porphyry systems in the Yukon-Tanana upland, eastern Alaska, USA
U-Pb and Lu-Hf isotope, age, and trace-element data from zircons at four sites in the western Alaska Range and Talkeetna Mountains, Alaska
Copahue volcano and its regional magmatic setting
GIS-Based Identification of Areas with Mineral Resource Potential for Six Selected Deposit Groups, Bureau of Land Management Central Yukon Planning Area, Alaska
Effects of simple acid leaching of crushed and powdered geological materials on high-precision Pb isotope analyses
Science and Products
Understanding PGE, Cr, Ni and Cu Potential in Ophiolitic Rocks in Alaska
Metallogeny and Tectonics of the Lake Clark and Neacola Mountains Region, South-central Alaska
U-Pb Ages, Hafnium Isotope Ratios, and Trace Element Concentrations by Laser-ablation Split Stream (LASS) Analysis of Igneous and Metamorphic Zircons from the Yukon-Tanana Upland, Eastern Alaska
U-Pb Ages, Hafnium Isotope Ratios, and Trace Element Concentrations by Laser-Ablation Split Stream (LASS) Analysis of Igneous Zircons from the Western Alaska Range
Uranium-Lead Ages, Hafnium Isotope Ratios, and Trace Element Concentrations by Laser-Ablation Split Stream (LASS) Analysis of Igneous Zircons from the Darby Mountains Area, Seward Peninsula, Alaska
Whole Rock Major and Trace Element Chemistry for Igneous and Metamorphic Rocks from the Yukon-Tanana Upland, Alaska
Whole Rock Major and Trace Element Chemistry for Igneous Rocks from Tyonek, Lime Hills, Talkeetna, McGrath, and Lake Clark Quadrangles, Western Alaska Range, Alaska
Whole Rock Major and Trace Element Chemistry for Igneous and Sedimentary Rocks from the Western Alaska Range, Alaska
U-Pb Isotopic Data and Ages of Zircon and Titanite from Rocks from the Western Alaska Range, Northern Aleutian Range, Taylor Mountains, and Tikchik Mountains Regions, Alaska
USGS researcher collecting samples in Kanuti, Alaska. The samples collected in this location were more resistant to weathering than the surrounding rock indicating a change in lithology.
USGS researcher collecting samples in Kanuti, Alaska. The samples collected in this location were more resistant to weathering than the surrounding rock indicating a change in lithology.
USGS researcher making observations and recording information on the outcrop of the Kanuti Ophiolite in Alaska. The Kanuti ophiolite is a mafic-ultramafic thrust sheet of probable Jurassic age, formerly considered to be the upper part of the Yukon-Koyukuk ophiolite (Angayucham terrane).
USGS researcher making observations and recording information on the outcrop of the Kanuti Ophiolite in Alaska. The Kanuti ophiolite is a mafic-ultramafic thrust sheet of probable Jurassic age, formerly considered to be the upper part of the Yukon-Koyukuk ophiolite (Angayucham terrane).
USGS researcher collecting one more sample while waiting for the helicopter in Kanuti, Alaska. The Kanuti ophiolite is a mafic-ultramafic thrust sheet of probable Jurassic age, formerly considered to be the upper part of the Yukon-Koyukuk ophiolite (Angayucham terrane).
USGS researcher collecting one more sample while waiting for the helicopter in Kanuti, Alaska. The Kanuti ophiolite is a mafic-ultramafic thrust sheet of probable Jurassic age, formerly considered to be the upper part of the Yukon-Koyukuk ophiolite (Angayucham terrane).
Variation of weathering and lichen growth on the rock surface reveals veins and segregated zones with different mineralogy.
Variation of weathering and lichen growth on the rock surface reveals veins and segregated zones with different mineralogy.
The photo was taken by Erin Todd during helicopter-supported geologic fieldwork in Lake Clark National Park this past summer.
The photo was taken by Erin Todd during helicopter-supported geologic fieldwork in Lake Clark National Park this past summer.
USGS research geologist Jamey Jones collects multiple samples of rocks exposed in a glacial stream valley near Lake Clark.
USGS research geologist Jamey Jones collects multiple samples of rocks exposed in a glacial stream valley near Lake Clark.
USGS research geologist Jamey Jones stands on a dike of granite intruding darker granodiorite, with helicopter in background.
USGS research geologist Jamey Jones stands on a dike of granite intruding darker granodiorite, with helicopter in background.
USGS research geologists Richard Lease (left) and Jamey Jones (right) take notes and collect samples of fine-grained metamorphic rock hosted as an inclusion in coarser-grained granodiorite.
USGS research geologists Richard Lease (left) and Jamey Jones (right) take notes and collect samples of fine-grained metamorphic rock hosted as an inclusion in coarser-grained granodiorite.
USGS research geologists Jamey Jones (left) and Richard Lease (right) make observations of rock units revealed by the glacier below.
USGS research geologists Jamey Jones (left) and Richard Lease (right) make observations of rock units revealed by the glacier below.
Molybdenite mineral coating on a fractured surface in Tertiary granite north of Lake Clark
Molybdenite mineral coating on a fractured surface in Tertiary granite north of Lake Clark
USGS research geologists Jamey Jones (left) and Erin Todd (right) discuss the "big picture" geology in their project area in and around Lake Clark National Park. Redoubt volcano in background left; baseball-sized cobbles on ground at researchers feet are pumice cobbles from the 2009(?) eruption of Redoubt volcano.
USGS research geologists Jamey Jones (left) and Erin Todd (right) discuss the "big picture" geology in their project area in and around Lake Clark National Park. Redoubt volcano in background left; baseball-sized cobbles on ground at researchers feet are pumice cobbles from the 2009(?) eruption of Redoubt volcano.
Jamey Jones collects a sample of Talkeenta Formation volcaniclastic sandstone for detrital zircon geochronology.
Jamey Jones collects a sample of Talkeenta Formation volcaniclastic sandstone for detrital zircon geochronology.
USGS researcher Jonathan Caine measures vein orientation at an outcrop of late Cretaceous pluton in Lake Clark National Park.
USGS researcher Jonathan Caine measures vein orientation at an outcrop of late Cretaceous pluton in Lake Clark National Park.
Cross-cutting relationships of at least 4 different phases of rock and high-temperature silicate fluids in a sample from the Lake Clark area.
Cross-cutting relationships of at least 4 different phases of rock and high-temperature silicate fluids in a sample from the Lake Clark area.
Detrital zircons and the magmatic history of Viti Levu, Fiji
Chemical geodynamics insights from a machine learning approach
Juvenile continental crust evolution in a modern oceanic arc setting: Petrogenesis of Cenozoic felsic plutons in Fiji, SW Pacific
Breaking up is hard to do: Magmatism during oceanic arc breakup, subduction reversal, and cessation
Sr, Nd, Hf and Pb isotope geochemistry of Early Miocene shoshonitic lavas from the South Fiji Basin: Note
Cretaceous to Oligocene magmatic and tectonic evolution of the western Alaska Range: Insights from U-Pb and 40Ar/39Ar geochronology
Basalt geochemistry and mantle flow during early backarc basin evolution: Havre Trough and Kermadec Arc, southwest Pacific
Links between tectonics, magmatism, and mineralization in the formation of Late Cretaceous porphyry systems in the Yukon-Tanana upland, eastern Alaska, USA
U-Pb and Lu-Hf isotope, age, and trace-element data from zircons at four sites in the western Alaska Range and Talkeetna Mountains, Alaska
Copahue volcano and its regional magmatic setting
GIS-Based Identification of Areas with Mineral Resource Potential for Six Selected Deposit Groups, Bureau of Land Management Central Yukon Planning Area, Alaska
Effects of simple acid leaching of crushed and powdered geological materials on high-precision Pb isotope analyses
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government