Poul Emsbo
Poul Emsbo is a Research Geologist with the Geology, Geophysics, and Geochemistry Science Center.
Science and Products
Unconventional Stratabound Critical Mineral Deposits of the Midcontinent: Linkages Between Mineralization in Marine Epicontinental Sedimentary Basin Systems
This project will evaluate and characterize the critical mineral potential of midcontinent stratabound "Bathtub Rim" deposits for rare earth elements, cobalt, lithium, and associated critical mineral prospectivity and to develop and test new ore genesis models.
Domestic and international rock geochemistry of ore and host rocks generated by the Critical Minerals Mapping Initiative Domestic and international rock geochemistry of ore and host rocks generated by the Critical Minerals Mapping Initiative
Geochemical data included were generated as part of the Critical Minerals Mapping Initiative (CMMI). Individual samples are classified according to the Hofstra et al. (2021) CMMI deposit classification scheme. The goal of CMMI is to collaborate with Geoscience Australia and the Geological Survey of Canada to build a global database of critical minerals in a variety of ore deposits. The...
Global Geochemical Database for Critical Minerals in Archived Mine Samples Global Geochemical Database for Critical Minerals in Archived Mine Samples
The Critical Minerals in Archived Mine Samples Database (CMDB) contains chemistry and geologic information for historic ore and ore-related rock samples from mineral deposits in the United States. In addition, the database contains samples from archetypal deposits from 27 other countries in North America, South America, Asia, Africa and Europe. Samples were obtained from archived ore...
GIS and Data Tables for Focus Areas for Potential Domestic Nonfuel Sources of Rare Earth Elements GIS and Data Tables for Focus Areas for Potential Domestic Nonfuel Sources of Rare Earth Elements
In response to Executive Order 13817 of December 20, 2017, the U.S. Geological Survey (USGS) coordinated with the Bureau of Land Management (BLM) to identify 35 nonfuel minerals or mineral materials considered critical to the economic and national security of the United States (U.S.). Acquiring information on possible domestic sources of these critical minerals is the basis of the USGS...
Filter Total Items: 43
Re-Os dating of paleozoic organic-rich black shales by LA-ICP-MS/MS Re-Os dating of paleozoic organic-rich black shales by LA-ICP-MS/MS
We present a new in-situ method for Re-Os geochronology of black shales using LA-ICP-MS/MS that is rapid, cost-effective, and sufficiently accurate and precise to address many geological questions. The method is tested on Paleozoic organic-rich black shales with independently constrained stratigraphic or radiometric ages. Results demonstrate that LA-ICP-MS/MS analysis yields Re-Os dates...
Authors
Jay M. Thompson, Stijn Glorie, Amanda Kate Souders, Sarah E. Gilbert, Timothy Paton, Poul Emsbo
Metal induced chitinozoan malformations link the Mid-Ludfordian OAE to the venting of metalliferous hydrothermal basin brines into the Silurian Ocean Metal induced chitinozoan malformations link the Mid-Ludfordian OAE to the venting of metalliferous hydrothermal basin brines into the Silurian Ocean
The mechanisms driving Silurian Ocean Anoxic Events (OAEs) and their impact on marine biota remain poorly understood. Previous studies linked chitinozoan (fossil zooplankton) malformations to heavy metal toxicity under expanding reducing oceanic conditions during the onset of some of these events. Importantly, these malformations represent in vivo reactions to changing paleoenvironmental...
Authors
Tim De Backer, Poul Emsbo, Patrick I. McLaughlin, Iris Vancoppenolle, Carolina Klock, Axel Munnecke, Thijs R.A. Vandenbroucke
Chitinozoan biostratigraphy through the Aeronian – Telychian boundary interval on Anticosti Island, Canada Chitinozoan biostratigraphy through the Aeronian – Telychian boundary interval on Anticosti Island, Canada
The well-preserved Llandovery (lower Silurian) succession of Anticosti Island (Quebec, eastern Canada) contains an expanded Aeronian–Telychian boundary interval when compared to other coeval basins. This boundary interval on Anticosti Island also includes two of the most important Llandovery biogeochemical events, the late Aeronian and Valgu events. These two events were previously...
Authors
Carolina Klock, André Desrochers, Patrick I. McLaughlin, Poul Emsbo, Tim De Backer, Fien M. Jonckheere, Cristiana J.P. Esteves, Thijs R.A. Vandenbroucke
Chitinozoan response to the ‘Kellwasser events’: Population dynamics and morphological deformities across the Frasnian–Famennian mass extinction Chitinozoan response to the ‘Kellwasser events’: Population dynamics and morphological deformities across the Frasnian–Famennian mass extinction
Fossil (zoo)plankton dynamics during Devonian ocean-anoxic and extinction events can shed light on the palaeoceanographic and geochemical processes that shaped the middle Palaeozoic biosphere. However, datasets on (Upper) Devonian marine palynology, illustrating such dynamics, remain underexplored. The type section of the Sweetland Creek Shale in Iowa (USA) offers a detailed conodont...
Authors
Tim De Backer, James (Jed) E. Day, Poul Emsbo, Patrick I. McLaughlin, Thijs R.A. Vandenbroucke
Data-driven prospectivity modelling of sediment-hosted Zn-Pb mineral systems and their critical raw materials Data-driven prospectivity modelling of sediment-hosted Zn-Pb mineral systems and their critical raw materials
Demand for critical raw materials is expected to accelerate over the next few decades due to continued population growth and the shifting consumption patterns of the global economy. Sedimentary basins are important sources for critical raw materials and new discoveries of sediment–hosted Mississippi Valley–type (MVT) and/or clastic–dominated (CD) Zn–Pb deposits are likely required to...
Authors
Christopher J. M. Lawley, Anne E. McCafferty, Garth E. Graham, David L. Huston, Karen D. Kelley, Karol Czarnota, Suzanne Paradis, Jan M. Peter, Nathan Hayward, Mike Barlow, Poul Emsbo, Joshua Aaron Coyan, Carma A. San Juan, Michael G. Gadd
Data-driven prospectivity modelling of sediment-hosted mineral systems Data-driven prospectivity modelling of sediment-hosted mineral systems
Mississippi Valley-type (MVT) and clastic-dominated (CD) deposits are important sources for Zn, Pb, Ag, and Cd as well as the critical elements Ga, Ge, In, and Sb. However, mapping the drivers, sources, pathways, and traps of MVT and CD deposits within the much larger and mostly unmineralized sedimentary basins remain some of the least understood aspects of these mineral systems. Herein...
Authors
Christopher J.M. Lawley, Anne E. McCafferty, Garth E. Graham, Michael G. Gadd, David L. Huston, Karen D. Kelley, Karol Czarnota, Suzanne Paradis, Jan M. Peter, Nathan Hayward, Mike Barlow, Poul Emsbo, Joshua A. Coyan, Carma A. San Juan
Deposit classification scheme for the Critical Minerals Mapping Initiative Global Geochemical Database Deposit classification scheme for the Critical Minerals Mapping Initiative Global Geochemical Database
A challenge for the global economy is to meet the growing demand for commodities used in today’s advanced technologies. Critical minerals are commodities (for example, elements, compounds, minerals) deemed vital to the economic and national security of individual countries that are vulnerable to supply disruption. The national geological agencies of Australia, Canada, and the United...
Authors
Albert H. Hofstra, Vladimir Lisitsin, Louise Corriveau, Suzanne Paradis, Jan Peter, Kathleen Lauziere, Christopher Lawley, Michael Gadd, Jean-Luc Pilote, Ian Honsberger, Evgeniy Bastrakov, David C. Champion, Karol Czarnota, Michael P. Doublier, David L. Huston, Oliver Raymond, Simon VanDerWielen, Poul Emsbo, Matthew Granitto, Douglas C. Kreiner
Sedex hydrothermal systems triggered upheavals to marine chemistry and mass extinctions: Applications for ore genesis research and mineral exploration Sedex hydrothermal systems triggered upheavals to marine chemistry and mass extinctions: Applications for ore genesis research and mineral exploration
New USGS research reveals that the discharge of metal-rich brine that formed sedex deposits on ancient seafloors had profound effects on global ocean chemistry and biologic evolution. For example, brine expulsion caused short-duration positive excursions (“spikes”) in the global marine Sr isotope record. While these spikes are unexplained by conventional oceanic models, our...
Authors
Poul Emsbo
Geological Surveys unite to improve critical mineral security Geological Surveys unite to improve critical mineral security
The global economy is unprepared to meet the exploding demand for critical minerals. These materials, many of which were of little economic interest until recently, are required to fuel a proliferation of technologies and industries that have become vital for social and economic well-being the world over. But supplies of critical minerals are at risk because of their natural scarcity and...
Authors
Poul Emsbo, Christopher Lawley, Karol Czarnota
Revised perspectives on Devonian biozonation and environmental volatility in the wake of recent time-scale revisions Revised perspectives on Devonian biozonation and environmental volatility in the wake of recent time-scale revisions
Revised time-scales for the Devonian Period have highlighted major discrepancies in the frequency of evolutionary, eustatic, carbon cycle, and biotic events. The number of conodont biozones per million years shows strong variation among stages. Using two alternative time scales, the lowest values are in the Emsian and highest in the Givetian, Frasnian, and Famennian stages. A similar...
Authors
Carlton E. Brett, James J. Zambito, Patrick I. McLaughlin, Poul Emsbo
Rare earth element mineral deposits in the United States Rare earth element mineral deposits in the United States
Because of their unique special chemical properties, many of the metals in the group of rare earth elements (REEs) have essential applications in 21st century technologies. Examples of products that use REEs are cell phones, computers, fluorescent and light-emitting-diode lights, flat-screen television and computer monitors, and in high-strength magnets used by clean energy technologies...
Authors
Bradley S. Van Gosen, Philip L. Verplanck, Poul Emsbo
The rise of pinnacle reefs: Islands of diversity in seas of despair The rise of pinnacle reefs: Islands of diversity in seas of despair
Pinnacle reef tracts are geomorphic features of carbonate systems that originated in the early Silurian and display an episodic distribution into the Cenozoic. Detailed study of Silurian pinnacle reefs of the United States midcontinent demonstrates repeated motifs, but most enigmatic is the coincidence of carbonate carbon isotope (δ13Ccarb) excursions and reef pulses. Silurian δ13Ccarb...
Authors
Patrick I McLaughlin, Alyssa M Bancroft, Carlton E. Brett, Poul Emsbo
Science and Products
Unconventional Stratabound Critical Mineral Deposits of the Midcontinent: Linkages Between Mineralization in Marine Epicontinental Sedimentary Basin Systems
This project will evaluate and characterize the critical mineral potential of midcontinent stratabound "Bathtub Rim" deposits for rare earth elements, cobalt, lithium, and associated critical mineral prospectivity and to develop and test new ore genesis models.
Domestic and international rock geochemistry of ore and host rocks generated by the Critical Minerals Mapping Initiative Domestic and international rock geochemistry of ore and host rocks generated by the Critical Minerals Mapping Initiative
Geochemical data included were generated as part of the Critical Minerals Mapping Initiative (CMMI). Individual samples are classified according to the Hofstra et al. (2021) CMMI deposit classification scheme. The goal of CMMI is to collaborate with Geoscience Australia and the Geological Survey of Canada to build a global database of critical minerals in a variety of ore deposits. The...
Global Geochemical Database for Critical Minerals in Archived Mine Samples Global Geochemical Database for Critical Minerals in Archived Mine Samples
The Critical Minerals in Archived Mine Samples Database (CMDB) contains chemistry and geologic information for historic ore and ore-related rock samples from mineral deposits in the United States. In addition, the database contains samples from archetypal deposits from 27 other countries in North America, South America, Asia, Africa and Europe. Samples were obtained from archived ore...
GIS and Data Tables for Focus Areas for Potential Domestic Nonfuel Sources of Rare Earth Elements GIS and Data Tables for Focus Areas for Potential Domestic Nonfuel Sources of Rare Earth Elements
In response to Executive Order 13817 of December 20, 2017, the U.S. Geological Survey (USGS) coordinated with the Bureau of Land Management (BLM) to identify 35 nonfuel minerals or mineral materials considered critical to the economic and national security of the United States (U.S.). Acquiring information on possible domestic sources of these critical minerals is the basis of the USGS...
Filter Total Items: 43
Re-Os dating of paleozoic organic-rich black shales by LA-ICP-MS/MS Re-Os dating of paleozoic organic-rich black shales by LA-ICP-MS/MS
We present a new in-situ method for Re-Os geochronology of black shales using LA-ICP-MS/MS that is rapid, cost-effective, and sufficiently accurate and precise to address many geological questions. The method is tested on Paleozoic organic-rich black shales with independently constrained stratigraphic or radiometric ages. Results demonstrate that LA-ICP-MS/MS analysis yields Re-Os dates...
Authors
Jay M. Thompson, Stijn Glorie, Amanda Kate Souders, Sarah E. Gilbert, Timothy Paton, Poul Emsbo
Metal induced chitinozoan malformations link the Mid-Ludfordian OAE to the venting of metalliferous hydrothermal basin brines into the Silurian Ocean Metal induced chitinozoan malformations link the Mid-Ludfordian OAE to the venting of metalliferous hydrothermal basin brines into the Silurian Ocean
The mechanisms driving Silurian Ocean Anoxic Events (OAEs) and their impact on marine biota remain poorly understood. Previous studies linked chitinozoan (fossil zooplankton) malformations to heavy metal toxicity under expanding reducing oceanic conditions during the onset of some of these events. Importantly, these malformations represent in vivo reactions to changing paleoenvironmental...
Authors
Tim De Backer, Poul Emsbo, Patrick I. McLaughlin, Iris Vancoppenolle, Carolina Klock, Axel Munnecke, Thijs R.A. Vandenbroucke
Chitinozoan biostratigraphy through the Aeronian – Telychian boundary interval on Anticosti Island, Canada Chitinozoan biostratigraphy through the Aeronian – Telychian boundary interval on Anticosti Island, Canada
The well-preserved Llandovery (lower Silurian) succession of Anticosti Island (Quebec, eastern Canada) contains an expanded Aeronian–Telychian boundary interval when compared to other coeval basins. This boundary interval on Anticosti Island also includes two of the most important Llandovery biogeochemical events, the late Aeronian and Valgu events. These two events were previously...
Authors
Carolina Klock, André Desrochers, Patrick I. McLaughlin, Poul Emsbo, Tim De Backer, Fien M. Jonckheere, Cristiana J.P. Esteves, Thijs R.A. Vandenbroucke
Chitinozoan response to the ‘Kellwasser events’: Population dynamics and morphological deformities across the Frasnian–Famennian mass extinction Chitinozoan response to the ‘Kellwasser events’: Population dynamics and morphological deformities across the Frasnian–Famennian mass extinction
Fossil (zoo)plankton dynamics during Devonian ocean-anoxic and extinction events can shed light on the palaeoceanographic and geochemical processes that shaped the middle Palaeozoic biosphere. However, datasets on (Upper) Devonian marine palynology, illustrating such dynamics, remain underexplored. The type section of the Sweetland Creek Shale in Iowa (USA) offers a detailed conodont...
Authors
Tim De Backer, James (Jed) E. Day, Poul Emsbo, Patrick I. McLaughlin, Thijs R.A. Vandenbroucke
Data-driven prospectivity modelling of sediment-hosted Zn-Pb mineral systems and their critical raw materials Data-driven prospectivity modelling of sediment-hosted Zn-Pb mineral systems and their critical raw materials
Demand for critical raw materials is expected to accelerate over the next few decades due to continued population growth and the shifting consumption patterns of the global economy. Sedimentary basins are important sources for critical raw materials and new discoveries of sediment–hosted Mississippi Valley–type (MVT) and/or clastic–dominated (CD) Zn–Pb deposits are likely required to...
Authors
Christopher J. M. Lawley, Anne E. McCafferty, Garth E. Graham, David L. Huston, Karen D. Kelley, Karol Czarnota, Suzanne Paradis, Jan M. Peter, Nathan Hayward, Mike Barlow, Poul Emsbo, Joshua Aaron Coyan, Carma A. San Juan, Michael G. Gadd
Data-driven prospectivity modelling of sediment-hosted mineral systems Data-driven prospectivity modelling of sediment-hosted mineral systems
Mississippi Valley-type (MVT) and clastic-dominated (CD) deposits are important sources for Zn, Pb, Ag, and Cd as well as the critical elements Ga, Ge, In, and Sb. However, mapping the drivers, sources, pathways, and traps of MVT and CD deposits within the much larger and mostly unmineralized sedimentary basins remain some of the least understood aspects of these mineral systems. Herein...
Authors
Christopher J.M. Lawley, Anne E. McCafferty, Garth E. Graham, Michael G. Gadd, David L. Huston, Karen D. Kelley, Karol Czarnota, Suzanne Paradis, Jan M. Peter, Nathan Hayward, Mike Barlow, Poul Emsbo, Joshua A. Coyan, Carma A. San Juan
Deposit classification scheme for the Critical Minerals Mapping Initiative Global Geochemical Database Deposit classification scheme for the Critical Minerals Mapping Initiative Global Geochemical Database
A challenge for the global economy is to meet the growing demand for commodities used in today’s advanced technologies. Critical minerals are commodities (for example, elements, compounds, minerals) deemed vital to the economic and national security of individual countries that are vulnerable to supply disruption. The national geological agencies of Australia, Canada, and the United...
Authors
Albert H. Hofstra, Vladimir Lisitsin, Louise Corriveau, Suzanne Paradis, Jan Peter, Kathleen Lauziere, Christopher Lawley, Michael Gadd, Jean-Luc Pilote, Ian Honsberger, Evgeniy Bastrakov, David C. Champion, Karol Czarnota, Michael P. Doublier, David L. Huston, Oliver Raymond, Simon VanDerWielen, Poul Emsbo, Matthew Granitto, Douglas C. Kreiner
Sedex hydrothermal systems triggered upheavals to marine chemistry and mass extinctions: Applications for ore genesis research and mineral exploration Sedex hydrothermal systems triggered upheavals to marine chemistry and mass extinctions: Applications for ore genesis research and mineral exploration
New USGS research reveals that the discharge of metal-rich brine that formed sedex deposits on ancient seafloors had profound effects on global ocean chemistry and biologic evolution. For example, brine expulsion caused short-duration positive excursions (“spikes”) in the global marine Sr isotope record. While these spikes are unexplained by conventional oceanic models, our...
Authors
Poul Emsbo
Geological Surveys unite to improve critical mineral security Geological Surveys unite to improve critical mineral security
The global economy is unprepared to meet the exploding demand for critical minerals. These materials, many of which were of little economic interest until recently, are required to fuel a proliferation of technologies and industries that have become vital for social and economic well-being the world over. But supplies of critical minerals are at risk because of their natural scarcity and...
Authors
Poul Emsbo, Christopher Lawley, Karol Czarnota
Revised perspectives on Devonian biozonation and environmental volatility in the wake of recent time-scale revisions Revised perspectives on Devonian biozonation and environmental volatility in the wake of recent time-scale revisions
Revised time-scales for the Devonian Period have highlighted major discrepancies in the frequency of evolutionary, eustatic, carbon cycle, and biotic events. The number of conodont biozones per million years shows strong variation among stages. Using two alternative time scales, the lowest values are in the Emsian and highest in the Givetian, Frasnian, and Famennian stages. A similar...
Authors
Carlton E. Brett, James J. Zambito, Patrick I. McLaughlin, Poul Emsbo
Rare earth element mineral deposits in the United States Rare earth element mineral deposits in the United States
Because of their unique special chemical properties, many of the metals in the group of rare earth elements (REEs) have essential applications in 21st century technologies. Examples of products that use REEs are cell phones, computers, fluorescent and light-emitting-diode lights, flat-screen television and computer monitors, and in high-strength magnets used by clean energy technologies...
Authors
Bradley S. Van Gosen, Philip L. Verplanck, Poul Emsbo
The rise of pinnacle reefs: Islands of diversity in seas of despair The rise of pinnacle reefs: Islands of diversity in seas of despair
Pinnacle reef tracts are geomorphic features of carbonate systems that originated in the early Silurian and display an episodic distribution into the Cenozoic. Detailed study of Silurian pinnacle reefs of the United States midcontinent demonstrates repeated motifs, but most enigmatic is the coincidence of carbonate carbon isotope (δ13Ccarb) excursions and reef pulses. Silurian δ13Ccarb...
Authors
Patrick I McLaughlin, Alyssa M Bancroft, Carlton E. Brett, Poul Emsbo