Poul Emsbo
Poul Emsbo is a Research Geologist with the Geology, Geophysics, and Geochemistry Science Center.
Science and Products
Filter Total Items: 43
Testing the potential role of brine reflux in the formation of sedimentary exhalative (Sedex) ore deposits Testing the potential role of brine reflux in the formation of sedimentary exhalative (Sedex) ore deposits
Sedimentary exhalative (sedex) ore deposits are the world’s largest Zn-Pb deposits. While the geologic processes that formed these deposits are generally well understood, the fundamental hydrologic processes that drove these massive hydrothermal systems remain an area of debate. We use numerical modeling to test an emerging hypothesis, supported by recent ore genesis research and sedex...
Authors
Andrew H. Manning, Poul Emsbo
Chapter 5: Impact of sedimentary-exhalative hydrothermal systems on marine chemistry and mass extinctions: Applications for ore genesis research and mineral exploration Chapter 5: Impact of sedimentary-exhalative hydrothermal systems on marine chemistry and mass extinctions: Applications for ore genesis research and mineral exploration
Times of metal-rich brine discharge into ancient ocean basins, associated with the formation of sedimentary-exhalative (sedex) Zn-Pb-Ba ore deposits, coincided with short-duration positive excursions (“spikes”) in the global marine Sr isotope record. While these spikes are unexplained by conventional oceanic models, chronostratigraphic correlations, combined with mass balance evidence...
Authors
Poul Emsbo, Wayne R. Premo, Patrick I McLaughlin, Leonid A. Neymark, Thijs R Vandenbroucke, James (Jed) Day, Edward A. du Bray, Andrew H. Manning, Alyssa M Bancroft
Chapter 7: Structural configuration of the Central African Copperbelt: Roles of evaporites in structural evolution, basin hydrology, and ore location Chapter 7: Structural configuration of the Central African Copperbelt: Roles of evaporites in structural evolution, basin hydrology, and ore location
The Central African Copperbelt is the world’s premier sediment-hosted Cu province. It is contained in the Katangan basin, an intracratonic rift that records onset of growth at ~840 Ma and inversion at ~535 Ma. In the Copperbelt region, the basin has a crudely symmetrical form, with a central depocenter maximum containing ~11 km of strata positioned on the northern side of the border of...
Authors
David Selley, Robert Scott, Poul Emsbo, Lyudmyla Koziy, Murray W. Hitzman, Stuart W. Bull, Mark Duffett, Stanislas Sebagenzi, Jacqueline Halpin, David W. Broughton
Chapter 10: Regional- to deposit-scale geologic controls on copper-silver mineralization in the Kalahari Copperbelt, Botswana Chapter 10: Regional- to deposit-scale geologic controls on copper-silver mineralization in the Kalahari Copperbelt, Botswana
The Kalahari Copperbelt in northwestern Botswana is characterized by structurally controlled, stratabound, mineralogically zoned copper-silver deposits hosted along a major redox boundary within a late Mesoproterozoic rift succession. Copper-silver mineralized rocks occur on the limbs and in the hinge positions of regional-scale folds that characterize the Pan-African Ghanzi-Chobe zone...
Authors
Wesley S Hall, Catherine Knight, David J. Catterall, Clemens Augenstein, Brett M. Davies, John Deane, Batanani Muyoba, Oarabile Disang, Poul Emsbo, Yaoguo Li, Stephen Enders, Murray W. Hitzman
Mineral thermometry and fluid inclusion studies of the Pea Ridge iron oxide-apatite–rare earth element deposit, Mesoproterozoic St. Francois Mountains Terrane, southeast Missouri, USA Mineral thermometry and fluid inclusion studies of the Pea Ridge iron oxide-apatite–rare earth element deposit, Mesoproterozoic St. Francois Mountains Terrane, southeast Missouri, USA
Mineral thermometry and fluid inclusion studies were conducted on variably altered and mineralized samples from the Mesoproterozoic Pea Ridge iron oxide-apatite (IOA)-rare earth element (REE) deposit in order to constrain P-T conditions, fluid chemistry, and the source of salt and volatiles during early magnetite and later REE mineralization. Scanning electron microscopy (SEM)...
Authors
Albert H. Hofstra, Corey J. Meighan, Xinyu Song, Iain Samson, Erin E. Marsh, Heather A. Lowers, Poul Emsbo, Andrew G. Hunt
Sedimentary exhalative (sedex) zinc-lead-silver deposit model Sedimentary exhalative (sedex) zinc-lead-silver deposit model
This report draws on previous syntheses and basic research studies of sedimentary exhalative (sedex) deposits to arrive at the defining criteria, both descriptive and genetic, for sedex-type deposits. Studies of the tectonic, sedimentary, and fluid evolution of modern and ancient sedimentary basins have also been used to select defining criteria. The focus here is on the geologic...
Authors
Poul Emsbo, Robert R. Seal, George N. Breit, Sharon F. Diehl, Anjana K. Shah
Rare earth elements in sedimentary phosphate deposits: Solution to the global REE crisis? Rare earth elements in sedimentary phosphate deposits: Solution to the global REE crisis?
The critical role of rare earth elements (REEs), particularly heavy REEs (HREEs), in high-tech industries has created a surge in demand that is quickly outstripping known global supply and has triggered a worldwide scramble to discover new sources. The chemical analysis of 23 sedimentary phosphate deposits (phosphorites) in the United States demonstrates that they are significantly...
Authors
Poul Emsbo, Patrick I. McLaughlin, George N. Breit, Edward A. du Bray, Alan E. Koenig
Sulfate and sulfide sulfur isotopes (δ34S and δ33S) measured by solution and laser ablation MC-ICP-MS: An enhanced approach using external correction Sulfate and sulfide sulfur isotopes (δ34S and δ33S) measured by solution and laser ablation MC-ICP-MS: An enhanced approach using external correction
Isotope ratio measurements using a multi-collector inductively coupled plasma mass spectrometer (MC-ICP-MS) commonly use standard-sample bracketing with a single isotope standard for mass bias correction for elements with narrow-range isotope systems measured by MC-ICP-MS, e.g. Cu, Fe, Zn, and Hg. However, sulfur (S) isotopic composition (δ34S) in nature can range from at least − 40 to +...
Authors
Michael J. Pribil, William I. Ridley, Poul Emsbo
Precise determination of δ88Sr in rocks, minerals, and waters by double-spike TIMS: A powerful tool in the study of chemical, geologic, hydrologic and biologic processes Precise determination of δ88Sr in rocks, minerals, and waters by double-spike TIMS: A powerful tool in the study of chemical, geologic, hydrologic and biologic processes
We present strontium isotopic (88Sr/86Sr and 87Sr/86Sr) results obtained by 87Sr–84Sr double spike thermal ionization mass-spectrometry (DS-TIMS) for several standards as well as natural water samples and mineral samples of abiogenic and biogenic origin. The detailed data reduction algorithm and a user-friendly Sr-specific stand-alone computer program used for the spike calibration and...
Authors
Leonid A. Neymark, Wayne R. Premo, Nikolay N. Mel’nikov, Poul Emsbo
In situ quantification of Br and Cl in minerals and fluid inclusions by LA-ICP-MS: a powerful tool to identify fluid sources In situ quantification of Br and Cl in minerals and fluid inclusions by LA-ICP-MS: a powerful tool to identify fluid sources
Bromine and chlorine are important halogens for fluid source identification in the Earth's crust, but until recently we lacked routine analytical techniques to determine the concentration of these elements in situ on a micrometer scale in minerals and fluid inclusions. In this study, we evaluate the potential of in situ Cl and Br measurements by LA-ICP-MS through analysis of a range of...
Authors
Johannes Hammerli, Brian Rusk, Carl Spandler, Poul Emsbo, Nicholas H.S. Oliver
Genesis of the Touissit-Bou Beker Mississippi Valley-type district (Morocco-Algeria) and its relation to the Africa-Europe collision Genesis of the Touissit-Bou Beker Mississippi Valley-type district (Morocco-Algeria) and its relation to the Africa-Europe collision
The Mississippi Valley-type deposits of the Touissit-Bou Beker district are hosted by a 25 m thick sequence of diagenetically and hydrothermally dolomitized carbonate platform rocks of Aalenian-Bajocian age. The sulfide mineralization consists principally of galena and sphalerite and occurs as open-space fillings of voids and moderate to massive replacement of the medium- to coarse...
Authors
Mohammed Bouabdellah, Donald F. Sangster, David L. Leach, Alex C. Brown, Craig A. Johnson, Poul Emsbo
Distal signatures of Late Ordovician oceanic anoxia—New data from a classic epeiric ramp transect Distal signatures of Late Ordovician oceanic anoxia—New data from a classic epeiric ramp transect
No abstract available.
Authors
Patrick I. McLaughlin, Norlene Emerson, Brian Witzke, Bryan Sell, Poul Emsbo
Science and Products
Filter Total Items: 43
Testing the potential role of brine reflux in the formation of sedimentary exhalative (Sedex) ore deposits Testing the potential role of brine reflux in the formation of sedimentary exhalative (Sedex) ore deposits
Sedimentary exhalative (sedex) ore deposits are the world’s largest Zn-Pb deposits. While the geologic processes that formed these deposits are generally well understood, the fundamental hydrologic processes that drove these massive hydrothermal systems remain an area of debate. We use numerical modeling to test an emerging hypothesis, supported by recent ore genesis research and sedex...
Authors
Andrew H. Manning, Poul Emsbo
Chapter 5: Impact of sedimentary-exhalative hydrothermal systems on marine chemistry and mass extinctions: Applications for ore genesis research and mineral exploration Chapter 5: Impact of sedimentary-exhalative hydrothermal systems on marine chemistry and mass extinctions: Applications for ore genesis research and mineral exploration
Times of metal-rich brine discharge into ancient ocean basins, associated with the formation of sedimentary-exhalative (sedex) Zn-Pb-Ba ore deposits, coincided with short-duration positive excursions (“spikes”) in the global marine Sr isotope record. While these spikes are unexplained by conventional oceanic models, chronostratigraphic correlations, combined with mass balance evidence...
Authors
Poul Emsbo, Wayne R. Premo, Patrick I McLaughlin, Leonid A. Neymark, Thijs R Vandenbroucke, James (Jed) Day, Edward A. du Bray, Andrew H. Manning, Alyssa M Bancroft
Chapter 7: Structural configuration of the Central African Copperbelt: Roles of evaporites in structural evolution, basin hydrology, and ore location Chapter 7: Structural configuration of the Central African Copperbelt: Roles of evaporites in structural evolution, basin hydrology, and ore location
The Central African Copperbelt is the world’s premier sediment-hosted Cu province. It is contained in the Katangan basin, an intracratonic rift that records onset of growth at ~840 Ma and inversion at ~535 Ma. In the Copperbelt region, the basin has a crudely symmetrical form, with a central depocenter maximum containing ~11 km of strata positioned on the northern side of the border of...
Authors
David Selley, Robert Scott, Poul Emsbo, Lyudmyla Koziy, Murray W. Hitzman, Stuart W. Bull, Mark Duffett, Stanislas Sebagenzi, Jacqueline Halpin, David W. Broughton
Chapter 10: Regional- to deposit-scale geologic controls on copper-silver mineralization in the Kalahari Copperbelt, Botswana Chapter 10: Regional- to deposit-scale geologic controls on copper-silver mineralization in the Kalahari Copperbelt, Botswana
The Kalahari Copperbelt in northwestern Botswana is characterized by structurally controlled, stratabound, mineralogically zoned copper-silver deposits hosted along a major redox boundary within a late Mesoproterozoic rift succession. Copper-silver mineralized rocks occur on the limbs and in the hinge positions of regional-scale folds that characterize the Pan-African Ghanzi-Chobe zone...
Authors
Wesley S Hall, Catherine Knight, David J. Catterall, Clemens Augenstein, Brett M. Davies, John Deane, Batanani Muyoba, Oarabile Disang, Poul Emsbo, Yaoguo Li, Stephen Enders, Murray W. Hitzman
Mineral thermometry and fluid inclusion studies of the Pea Ridge iron oxide-apatite–rare earth element deposit, Mesoproterozoic St. Francois Mountains Terrane, southeast Missouri, USA Mineral thermometry and fluid inclusion studies of the Pea Ridge iron oxide-apatite–rare earth element deposit, Mesoproterozoic St. Francois Mountains Terrane, southeast Missouri, USA
Mineral thermometry and fluid inclusion studies were conducted on variably altered and mineralized samples from the Mesoproterozoic Pea Ridge iron oxide-apatite (IOA)-rare earth element (REE) deposit in order to constrain P-T conditions, fluid chemistry, and the source of salt and volatiles during early magnetite and later REE mineralization. Scanning electron microscopy (SEM)...
Authors
Albert H. Hofstra, Corey J. Meighan, Xinyu Song, Iain Samson, Erin E. Marsh, Heather A. Lowers, Poul Emsbo, Andrew G. Hunt
Sedimentary exhalative (sedex) zinc-lead-silver deposit model Sedimentary exhalative (sedex) zinc-lead-silver deposit model
This report draws on previous syntheses and basic research studies of sedimentary exhalative (sedex) deposits to arrive at the defining criteria, both descriptive and genetic, for sedex-type deposits. Studies of the tectonic, sedimentary, and fluid evolution of modern and ancient sedimentary basins have also been used to select defining criteria. The focus here is on the geologic...
Authors
Poul Emsbo, Robert R. Seal, George N. Breit, Sharon F. Diehl, Anjana K. Shah
Rare earth elements in sedimentary phosphate deposits: Solution to the global REE crisis? Rare earth elements in sedimentary phosphate deposits: Solution to the global REE crisis?
The critical role of rare earth elements (REEs), particularly heavy REEs (HREEs), in high-tech industries has created a surge in demand that is quickly outstripping known global supply and has triggered a worldwide scramble to discover new sources. The chemical analysis of 23 sedimentary phosphate deposits (phosphorites) in the United States demonstrates that they are significantly...
Authors
Poul Emsbo, Patrick I. McLaughlin, George N. Breit, Edward A. du Bray, Alan E. Koenig
Sulfate and sulfide sulfur isotopes (δ34S and δ33S) measured by solution and laser ablation MC-ICP-MS: An enhanced approach using external correction Sulfate and sulfide sulfur isotopes (δ34S and δ33S) measured by solution and laser ablation MC-ICP-MS: An enhanced approach using external correction
Isotope ratio measurements using a multi-collector inductively coupled plasma mass spectrometer (MC-ICP-MS) commonly use standard-sample bracketing with a single isotope standard for mass bias correction for elements with narrow-range isotope systems measured by MC-ICP-MS, e.g. Cu, Fe, Zn, and Hg. However, sulfur (S) isotopic composition (δ34S) in nature can range from at least − 40 to +...
Authors
Michael J. Pribil, William I. Ridley, Poul Emsbo
Precise determination of δ88Sr in rocks, minerals, and waters by double-spike TIMS: A powerful tool in the study of chemical, geologic, hydrologic and biologic processes Precise determination of δ88Sr in rocks, minerals, and waters by double-spike TIMS: A powerful tool in the study of chemical, geologic, hydrologic and biologic processes
We present strontium isotopic (88Sr/86Sr and 87Sr/86Sr) results obtained by 87Sr–84Sr double spike thermal ionization mass-spectrometry (DS-TIMS) for several standards as well as natural water samples and mineral samples of abiogenic and biogenic origin. The detailed data reduction algorithm and a user-friendly Sr-specific stand-alone computer program used for the spike calibration and...
Authors
Leonid A. Neymark, Wayne R. Premo, Nikolay N. Mel’nikov, Poul Emsbo
In situ quantification of Br and Cl in minerals and fluid inclusions by LA-ICP-MS: a powerful tool to identify fluid sources In situ quantification of Br and Cl in minerals and fluid inclusions by LA-ICP-MS: a powerful tool to identify fluid sources
Bromine and chlorine are important halogens for fluid source identification in the Earth's crust, but until recently we lacked routine analytical techniques to determine the concentration of these elements in situ on a micrometer scale in minerals and fluid inclusions. In this study, we evaluate the potential of in situ Cl and Br measurements by LA-ICP-MS through analysis of a range of...
Authors
Johannes Hammerli, Brian Rusk, Carl Spandler, Poul Emsbo, Nicholas H.S. Oliver
Genesis of the Touissit-Bou Beker Mississippi Valley-type district (Morocco-Algeria) and its relation to the Africa-Europe collision Genesis of the Touissit-Bou Beker Mississippi Valley-type district (Morocco-Algeria) and its relation to the Africa-Europe collision
The Mississippi Valley-type deposits of the Touissit-Bou Beker district are hosted by a 25 m thick sequence of diagenetically and hydrothermally dolomitized carbonate platform rocks of Aalenian-Bajocian age. The sulfide mineralization consists principally of galena and sphalerite and occurs as open-space fillings of voids and moderate to massive replacement of the medium- to coarse...
Authors
Mohammed Bouabdellah, Donald F. Sangster, David L. Leach, Alex C. Brown, Craig A. Johnson, Poul Emsbo
Distal signatures of Late Ordovician oceanic anoxia—New data from a classic epeiric ramp transect Distal signatures of Late Ordovician oceanic anoxia—New data from a classic epeiric ramp transect
No abstract available.
Authors
Patrick I. McLaughlin, Norlene Emerson, Brian Witzke, Bryan Sell, Poul Emsbo