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Redox heterogeneity of subsurface waters in the Mesoproterozoic ocean (2014)
Journal Article
Sperling, E., Rooney, A., Hays, L., Sergeeva, V., Vorob’eva, N., Sergeeva, N., …Knoll, A. (2014). Redox heterogeneity of subsurface waters in the Mesoproterozoic ocean. Geobiology, 12(5), 373-386. https://doi.org/10.1111/gbi.12091

A substantial body of evidence suggests that subsurface water masses in mid-Proterozoic marine basins were commonly anoxic, either euxinic (sulfidic) or ferruginous (free ferrous iron). To further document redox variations during this interval, a mul... Read More about Redox heterogeneity of subsurface waters in the Mesoproterozoic ocean.

New high resolution geochemistry of Lower Jurassic marine sections in western North America: A global positive carbon isotope excursion in the Sinemurian? (2014)
Journal Article
Porter, S., Smith, P., Carruthers, A., Hou, P., Gröcke, D., & Selby, D. (2014). New high resolution geochemistry of Lower Jurassic marine sections in western North America: A global positive carbon isotope excursion in the Sinemurian?. Earth and Planetary Science Letters, 397, 19-31. https://doi.org/10.1016/j.epsl.2014.04.023

Recognising variations in the carbon isotope compositions of marine organic-rich sedimentary rocks can provide insight into changes in ocean chemistry throughout geological time. Further, identification of global excursions in the carbon isotope reco... Read More about New high resolution geochemistry of Lower Jurassic marine sections in western North America: A global positive carbon isotope excursion in the Sinemurian?.

Rhenium–osmium abundance and isotopic compositions of massive sulfides from modern deep-sea hydrothermal systems: Implications for vent associated ore forming processes (2014)
Journal Article
Zeng, Z., Chen, S., Selby, D., Yin, X., & Wang, X. (2014). Rhenium–osmium abundance and isotopic compositions of massive sulfides from modern deep-sea hydrothermal systems: Implications for vent associated ore forming processes. Earth and Planetary Science Letters, 396, 223-234. https://doi.org/10.1016/j.epsl.2014.04.017

Studies of rhenium (Re) and osmium (Os) concentrations and isotopic compositions in seafloor hydrothermal sulfides are an important tool for understanding the evolution of hydrothermal systems, allowing the determination of both metal sources and rec... Read More about Rhenium–osmium abundance and isotopic compositions of massive sulfides from modern deep-sea hydrothermal systems: Implications for vent associated ore forming processes.

Re–Os geochronology and Os isotope fingerprinting of petroleum sourced from a Type I lacustrine kerogen: Insights from the natural Green River petroleum system in the Uinta Basin and hydrous pyrolysis experiments (2014)
Journal Article
Cumming, V., Selby, D., Lillis, P., & Lewan, M. (2014). Re–Os geochronology and Os isotope fingerprinting of petroleum sourced from a Type I lacustrine kerogen: Insights from the natural Green River petroleum system in the Uinta Basin and hydrous pyrolysis experiments. Geochimica et Cosmochimica Acta, 138, 32-56. https://doi.org/10.1016/j.gca.2014.04.016

Rhenium–osmium (Re–Os) geochronology of marine petroleum systems has allowed the determination of the depositional age of source rocks as well as the timing of petroleum generation. In addition, Os isotopes have been applied as a fingerprinting tool... Read More about Re–Os geochronology and Os isotope fingerprinting of petroleum sourced from a Type I lacustrine kerogen: Insights from the natural Green River petroleum system in the Uinta Basin and hydrous pyrolysis experiments.

Structural characteristics and Re–Os dating of quartz-pyrite veins in the Lewisian Gneiss Complex, NW Scotland: Evidence of an Early Paleoproterozoic hydrothermal regime during terrane amalgamation (2014)
Journal Article
Vernon, R., Holdsworth, R., Selby, D., Dempsey, E., Finlay, A., & Fallick, A. (2014). Structural characteristics and Re–Os dating of quartz-pyrite veins in the Lewisian Gneiss Complex, NW Scotland: Evidence of an Early Paleoproterozoic hydrothermal regime during terrane amalgamation. Precambrian Research, 246, 256-267. https://doi.org/10.1016/j.precamres.2014.03.007

In the Archaean basement rocks of the Assynt and Gruinard terranes of the mainland Lewisian Complex in NW Scotland, a regional suite of quartz-pyrite veins cross-cut regional Palaeoproterozoic (Badcallian, ca. 2700 Ma; Inverian, ca. 2480 Ma) fabrics... Read More about Structural characteristics and Re–Os dating of quartz-pyrite veins in the Lewisian Gneiss Complex, NW Scotland: Evidence of an Early Paleoproterozoic hydrothermal regime during terrane amalgamation.

Deep-sea coral record of human impact on watershed quality in the Mississippi River Basin (2014)
Journal Article
Prouty, N., Roark, E., Koenig, A., Demopoulos, A., Batista, F., Kocar, B., …Mienis, F. (2014). Deep-sea coral record of human impact on watershed quality in the Mississippi River Basin. Global Biogeochemical Cycles, 28(1), 29-43. https://doi.org/10.1002/2013gb004754

One of the greatest drivers of historical nutrient and sediment transport into the Gulf of Mexico is the unprecedented scale and intensity of land use change in the Mississippi River Basin. These landscape changes are linked to enhanced fluxes of car... Read More about Deep-sea coral record of human impact on watershed quality in the Mississippi River Basin.

Constraints on the timing of late-Eburnean metamorphism, gold mineralisation and regional exhumation at Damang mine, Ghana (2014)
Journal Article
White, A., Burgess, R., Charnley, N., Selby, D., Whitehouse, M., Robb, L., & Waters, D. (2014). Constraints on the timing of late-Eburnean metamorphism, gold mineralisation and regional exhumation at Damang mine, Ghana. Precambrian Research, 243, 18-38. https://doi.org/10.1016/j.precamres.2013.12.024

The Damang gold deposit in southwest Ghana is unique among known deposits in Ghana, comprising gold mineralisation in two distinct styles. Early gold, hosted in a stratigraphically controlled, auriferous quartz-pebble conglomerate horizon, is overpri... Read More about Constraints on the timing of late-Eburnean metamorphism, gold mineralisation and regional exhumation at Damang mine, Ghana.

Marine 187Os/188Os isotope stratigraphy reveals the interaction of volcanism and ocean circulation during Oceanic Anoxic Event 2 (2014)
Journal Article
Du Vivier, A., Selby, D., Sageman, B., Jarvis, I., Gröcke, D., & Voigt, S. (2014). Marine 187Os/188Os isotope stratigraphy reveals the interaction of volcanism and ocean circulation during Oceanic Anoxic Event 2. Earth and Planetary Science Letters, 389(1), 23-33. https://doi.org/10.1016/j.epsl.2013.12.024

High-resolution osmium (Os) isotope stratigraphy across the Cenomanian–Turonian Boundary Interval from 6 sections for four transcontinental settings has produced a record of seawater chemistry that demonstrates regional variability as a function of t... Read More about Marine 187Os/188Os isotope stratigraphy reveals the interaction of volcanism and ocean circulation during Oceanic Anoxic Event 2.

A sequence-stratigraphic framework for the Upper Devonian Woodford Shale, Permian Basin, west Texas (2014)
Journal Article
Hemmesch, N., Harris, N., Mnich, C., & Selby, D. (2014). A sequence-stratigraphic framework for the Upper Devonian Woodford Shale, Permian Basin, west Texas. AAPG Bulletin, 98(1), 23-47. https://doi.org/10.1306/05221312077

Criteria for recognizing stratigraphic sequences are well established on continental margins but more challenging to apply in basinal settings. We report an investigation of the Upper Devonian Woodford Shale, Permian Basin, west Texas based on a set... Read More about A sequence-stratigraphic framework for the Upper Devonian Woodford Shale, Permian Basin, west Texas.

Re-Os geochronology and coupled Os-Sr isotope constraints on the Sturtian snowball Earth (2013)
Journal Article
Rooney, A., Macdonald, F., Strauss, J., Dudás, F., Hallmann, C., & Selby, D. (2014). Re-Os geochronology and coupled Os-Sr isotope constraints on the Sturtian snowball Earth. Proceedings of the National Academy of Sciences, 111(1), 51-56. https://doi.org/10.1073/pnas.1317266110

After nearly a billion years with no evidence for glaciation, ice advanced to equatorial latitudes at least twice between 717 and 635 Mya. Although the initiation mechanism of these Neoproterozoic Snowball Earth events has remained a mystery, the bro... Read More about Re-Os geochronology and coupled Os-Sr isotope constraints on the Sturtian snowball Earth.

Re-Os Molybdenite, Pyrite, and Chalcopyrite Geochronology, Lupa Goldfield, Southwestern Tanzania: Tracing Metallogenic Time Scales at Midcrustal Shear Zones Hosting Orogenic Au Deposits (2013)
Journal Article
Lawley, C., Selby, D., & Imber, J. (2013). Re-Os Molybdenite, Pyrite, and Chalcopyrite Geochronology, Lupa Goldfield, Southwestern Tanzania: Tracing Metallogenic Time Scales at Midcrustal Shear Zones Hosting Orogenic Au Deposits. Economic geology and the bulletin of the Society of Economic Geologists, 108(7), 1591-1613. https://doi.org/10.2113/econgeo.108.7.1591

A detailed Re-Os molybdenite, pyrite, and chalcopyrite geochronology at five shear-hosted Au occurrences (Kenge, Mbenge, Porcupine, Konokono, and Dubwana) in the Lupa goldfield, southwestern Tanzania, is reported in this paper. Au occurrences within... Read More about Re-Os Molybdenite, Pyrite, and Chalcopyrite Geochronology, Lupa Goldfield, Southwestern Tanzania: Tracing Metallogenic Time Scales at Midcrustal Shear Zones Hosting Orogenic Au Deposits.

Structural Controls on Orogenic Au Mineralization During Transpression: Lupa Goldfield, Southwestern Tanzania (2013)
Journal Article
Lawley, C., Imber, J., & Selby, D. (2013). Structural Controls on Orogenic Au Mineralization During Transpression: Lupa Goldfield, Southwestern Tanzania. Economic geology and the bulletin of the Society of Economic Geologists, 108(7), 1615-1640. https://doi.org/10.2113/econgeo.108.7.1615

Au mineralization in the western Lupa goldfield, southwestern Tanzania was associated with transpression and reverse sinistral slip along a network of steeply S dipping shear zones with non-Andersonian geometries. Slip was accommodated by: (1) fricti... Read More about Structural Controls on Orogenic Au Mineralization During Transpression: Lupa Goldfield, Southwestern Tanzania.

Palaeoproterozoic orogenic gold style mineralization at the Southwestern Archaean Tanzanian cratonic margin, Lupa Goldfield, SW Tanzania: Implications from U–Pb titanite geochronology (2013)
Journal Article
Lawley, C., Selby, D., Condon, D., & Imber, J. (2014). Palaeoproterozoic orogenic gold style mineralization at the Southwestern Archaean Tanzanian cratonic margin, Lupa Goldfield, SW Tanzania: Implications from U–Pb titanite geochronology. Gondwana Research, 26(3-4), 1141-1158. https://doi.org/10.1016/j.gr.2013.08.025

The Lupa Goldfield, situated at the southwestern Tanzanian cratonic margin, comprises a network of auriferous quartz veins and greenschist facies mylonitic shear zones cutting a suite of Archaean–Palaeoproterozoic granitic–gabbroic intrusions. The ex... Read More about Palaeoproterozoic orogenic gold style mineralization at the Southwestern Archaean Tanzanian cratonic margin, Lupa Goldfield, SW Tanzania: Implications from U–Pb titanite geochronology.

Minor and Trace Element and Re-Os Chemistry of the Upper Devonian Woodford Shale, Permian Basin, West Texas: Insights into Metal Abundance and Basin Processes (2013)
Journal Article
Harris, N., Mnich, C., Selby, D., & Korn, D. (2013). Minor and Trace Element and Re-Os Chemistry of the Upper Devonian Woodford Shale, Permian Basin, West Texas: Insights into Metal Abundance and Basin Processes. Chemical Geology, 356, 76-93. https://doi.org/10.1016/j.chemgeo.2013.07.018

The trace and minor element and Re–Os geochemistry of the Upper Devonian Woodford Shale are analyzed in order to characterize elemental abundances, to identify associations among trace elements and to constrain paleoceanographic conditions and deposi... Read More about Minor and Trace Element and Re-Os Chemistry of the Upper Devonian Woodford Shale, Permian Basin, West Texas: Insights into Metal Abundance and Basin Processes.

Evaluation of the Rhenium-Osmium geochronometer in the Phosphoria Petroleum System, Bighorn Basin of Wyoming and Montana, USA (2013)
Journal Article
Lillis, P., & Selby, D. (2013). Evaluation of the Rhenium-Osmium geochronometer in the Phosphoria Petroleum System, Bighorn Basin of Wyoming and Montana, USA. Geochimica et Cosmochimica Acta, 118, 312-330. https://doi.org/10.1016/j.gca.2013.04.021

Rhenium–osmium (Re–Os) geochronometry is applied to crude oils derived from the Permian Phosphoria Formation of the Bighorn Basin in Wyoming and Montana to determine whether the radiogenic age reflects the timing of petroleum generation, timing of mi... Read More about Evaluation of the Rhenium-Osmium geochronometer in the Phosphoria Petroleum System, Bighorn Basin of Wyoming and Montana, USA.

Lithogeochemistry, Geochronology and Geodynamic Setting of the Lupa Terrane, Tanzania: Implications for the Extent of the Archean Tanzanian Craton (2013)
Journal Article
Lawley, C., Selby, D., Condon, D., Horstwood, M., Millar, I., Crowley, Q., & Imber, J. (2013). Lithogeochemistry, Geochronology and Geodynamic Setting of the Lupa Terrane, Tanzania: Implications for the Extent of the Archean Tanzanian Craton. Precambrian Research, 231, 174-193. https://doi.org/10.1016/j.precamres.2013.02.012

Herein we provide new zircon U–Pb ID-TIMS, U–Pb LA-MC-ICP-MS and Lu–Hf LA-MC-ICP-MS results from the Lupa Terrane, SW Tanzania, and demonstrate that previously considered Paleoproterozoic granites comprising the Paleoproterozoic Ubendian Belt are in... Read More about Lithogeochemistry, Geochronology and Geodynamic Setting of the Lupa Terrane, Tanzania: Implications for the Extent of the Archean Tanzanian Craton.

Termination of a continent-margin upwelling system at the Permian-Triassic boundary (Opal Creek, Alberta, Canada) (2013)
Journal Article
Schoepfer, S., Henderson, C., Garrison, G., Foriel, J., Ward, P., Selby, D., …Sheng, Y. (2013). Termination of a continent-margin upwelling system at the Permian-Triassic boundary (Opal Creek, Alberta, Canada). Global and Planetary Change, 105, 21-35. https://doi.org/10.1016/j.gloplacha.2012.07.005

Models of mass extinctions caused by greenhouse warming depend on the ability of warming to affect the oxygenation of the ocean, either through slowing circulation or changes in biological productivity and the organic carbon budget. Opal Creek, Alber... Read More about Termination of a continent-margin upwelling system at the Permian-Triassic boundary (Opal Creek, Alberta, Canada).