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041			|a eng
100			|a Crockford, P W  |4 aut
245			|a Claypool continued  |b Extending the isotopic record of sedimentary sulfate
260			|b Elsevier BV  |c 2019
490			|a GEM2: Geo-mapping for Energy and Minerals
520			|a The Proterozoic Eon spans Earth's middle age during which many important transitions occurred. These transitions include the oxygenation of the atmosphere, emergence of eukaryotic organisms and growth of continents. Since the sulfur and oxygen cycles are intricately linked to most surface biogeochemical processes, these transitions should be recorded in changes to the isotopic composition of marine and terrestrial sulfate minerals. Here we present oxygen (delta-17O, delta-18O) and sulfur (delta-33S, delta-34S) isotope records of Proterozoic sulfate from currently available data together with new measurements of 313 samples from 33 different formations bearing Earth's earliest unambiguous evaporites at 2.4 Ga through to Ediacaran aged deposits. This record depicts distinct intervals with respect to the expression of sulfate isotopes that are not completely captured by established intervals in the geologic timescale. The most salient pattern is the muted delta-17O signatures across the GOE, late Proterozoic and Ediacaran with values that are only slightly more negative than modern marine sulfate, contrasting with highly negative values across the mid-Proterozoic and Cryogenian. We combine these results with estimates of atmospheric composition to produce a gross primary production (GPP) curve for the Proterozoic. Through these results we argue that changes in GPP across Earth history likely help account for many of the changes in the Proterozoic Earth surface environment such as rising atmospheric oxygen, large fluctuations in the size of the marine sulfate reservoir and variations in the isotopic composition of sedimentary sulfate.
650			|a Bedrock Geology
650			|a Lithology
650			|a Sedimentary Rocks
650			|a Evaporites
650			|a Sulphates
650			|a Carbonates
650			|a Barite
650			|a Pyrite
650			|a Sulphides
650			|a Isotopic Studies
650			|a Isotopes
650			|a Sulphur
650			|a Oxygen
650			|a Geological History
650			|a Biogeochemistry
650			|a Atmospheric Geochemistry
650			|a Paleoenvironment
650			|a Great Oxidation Event
650			|a Canada
650			|a Ontario
650			|a Northwest Territories
650			|a Nunavut
650			|a World
655			|a Zeitschrift
700			|a Kunzmann, M  |4 aut
700			|a Bekker, A  |4 aut
700			|a Hayles, J  |4 aut
700			|a Bao, H  |4 aut
700			|a Halverson, G P  |4 aut
700			|a Peng, Y  |4 aut
700			|a Bui, T H  |4 aut
700			|a Cox, G M  |4 aut
700			|a Gibson, T M  |4 aut
700			|a Wörndle, S  |4 aut
700			|a Rainbird, R  |4 aut
700			|a Lepland, A  |4 aut
700			|a Swanson-Hysell, N L  |4 aut
700			|a Master, S  |4 aut
700			|a Sreenivas, B  |4 aut
700			|a Kuznetsov, A  |4 aut
700			|a Krupenik, V  |4 aut
700			|a Wing, B A  |4 aut
773	0	8	|g Chemical Geology
856	4	0	|q text/html  |3 Link zur Ressource  |u https://geoscan.nrcan.gc.ca/starweb/geoscan/servlet.starweb?path=geoscan/fulle.web&search1=R=314640
856			|q text/html  |3 Mackenzie Corridor, Coppermine River Transect, project number: 340546 (latest publications):   |u https://geoscan.nrcan.gc.ca/starweb/geoscan/servlet.starweb?path=geoscan/shorte.web&search1=PROJECT=340546
980			|a 314640  |b 129  |c sid-129-col-geoscan

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author	Crockford, P W, Kunzmann, M, Bekker, A, Hayles, J, Bao, H, Halverson, G P, Peng, Y, Bui, T H, Cox, G M, Gibson, T M, Wörndle, S, Rainbird, R, Lepland, A, Swanson-Hysell, N L, Master, S, Sreenivas, B, Kuznetsov, A, Krupenik, V, Wing, B A
author_facet	Crockford, P W, Kunzmann, M, Bekker, A, Hayles, J, Bao, H, Halverson, G P, Peng, Y, Bui, T H, Cox, G M, Gibson, T M, Wörndle, S, Rainbird, R, Lepland, A, Swanson-Hysell, N L, Master, S, Sreenivas, B, Kuznetsov, A, Krupenik, V, Wing, B A
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contents	The Proterozoic Eon spans Earth's middle age during which many important transitions occurred. These transitions include the oxygenation of the atmosphere, emergence of eukaryotic organisms and growth of continents. Since the sulfur and oxygen cycles are intricately linked to most surface biogeochemical processes, these transitions should be recorded in changes to the isotopic composition of marine and terrestrial sulfate minerals. Here we present oxygen (delta-17O, delta-18O) and sulfur (delta-33S, delta-34S) isotope records of Proterozoic sulfate from currently available data together with new measurements of 313 samples from 33 different formations bearing Earth's earliest unambiguous evaporites at 2.4 Ga through to Ediacaran aged deposits. This record depicts distinct intervals with respect to the expression of sulfate isotopes that are not completely captured by established intervals in the geologic timescale. The most salient pattern is the muted delta-17O signatures across the GOE, late Proterozoic and Ediacaran with values that are only slightly more negative than modern marine sulfate, contrasting with highly negative values across the mid-Proterozoic and Cryogenian. We combine these results with estimates of atmospheric composition to produce a gross primary production (GPP) curve for the Proterozoic. Through these results we argue that changes in GPP across Earth history likely help account for many of the changes in the Proterozoic Earth surface environment such as rising atmospheric oxygen, large fluctuations in the size of the marine sulfate reservoir and variations in the isotopic composition of sedimentary sulfate.
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spelling	Crockford, P W aut, Claypool continued Extending the isotopic record of sedimentary sulfate, Elsevier BV 2019, GEM2: Geo-mapping for Energy and Minerals, The Proterozoic Eon spans Earth's middle age during which many important transitions occurred. These transitions include the oxygenation of the atmosphere, emergence of eukaryotic organisms and growth of continents. Since the sulfur and oxygen cycles are intricately linked to most surface biogeochemical processes, these transitions should be recorded in changes to the isotopic composition of marine and terrestrial sulfate minerals. Here we present oxygen (delta-17O, delta-18O) and sulfur (delta-33S, delta-34S) isotope records of Proterozoic sulfate from currently available data together with new measurements of 313 samples from 33 different formations bearing Earth's earliest unambiguous evaporites at 2.4 Ga through to Ediacaran aged deposits. This record depicts distinct intervals with respect to the expression of sulfate isotopes that are not completely captured by established intervals in the geologic timescale. The most salient pattern is the muted delta-17O signatures across the GOE, late Proterozoic and Ediacaran with values that are only slightly more negative than modern marine sulfate, contrasting with highly negative values across the mid-Proterozoic and Cryogenian. We combine these results with estimates of atmospheric composition to produce a gross primary production (GPP) curve for the Proterozoic. Through these results we argue that changes in GPP across Earth history likely help account for many of the changes in the Proterozoic Earth surface environment such as rising atmospheric oxygen, large fluctuations in the size of the marine sulfate reservoir and variations in the isotopic composition of sedimentary sulfate., Bedrock Geology, Lithology, Sedimentary Rocks, Evaporites, Sulphates, Carbonates, Barite, Pyrite, Sulphides, Isotopic Studies, Isotopes, Sulphur, Oxygen, Geological History, Biogeochemistry, Atmospheric Geochemistry, Paleoenvironment, Great Oxidation Event, Canada, Ontario, Northwest Territories, Nunavut, World, Zeitschrift, Kunzmann, M aut, Bekker, A aut, Hayles, J aut, Bao, H aut, Halverson, G P aut, Peng, Y aut, Bui, T H aut, Cox, G M aut, Gibson, T M aut, Wörndle, S aut, Rainbird, R aut, Lepland, A aut, Swanson-Hysell, N L aut, Master, S aut, Sreenivas, B aut, Kuznetsov, A aut, Krupenik, V aut, Wing, B A aut, Chemical Geology, text/html Link zur Ressource https://geoscan.nrcan.gc.ca/starweb/geoscan/servlet.starweb?path=geoscan/fulle.web&search1=R=314640, text/html Mackenzie Corridor, Coppermine River Transect, project number: 340546 (latest publications): https://geoscan.nrcan.gc.ca/starweb/geoscan/servlet.starweb?path=geoscan/shorte.web&search1=PROJECT=340546
spellingShingle	Crockford, P W, Kunzmann, M, Bekker, A, Hayles, J, Bao, H, Halverson, G P, Peng, Y, Bui, T H, Cox, G M, Gibson, T M, Wörndle, S, Rainbird, R, Lepland, A, Swanson-Hysell, N L, Master, S, Sreenivas, B, Kuznetsov, A, Krupenik, V, Wing, B A, Claypool continued: Extending the isotopic record of sedimentary sulfate, The Proterozoic Eon spans Earth's middle age during which many important transitions occurred. These transitions include the oxygenation of the atmosphere, emergence of eukaryotic organisms and growth of continents. Since the sulfur and oxygen cycles are intricately linked to most surface biogeochemical processes, these transitions should be recorded in changes to the isotopic composition of marine and terrestrial sulfate minerals. Here we present oxygen (delta-17O, delta-18O) and sulfur (delta-33S, delta-34S) isotope records of Proterozoic sulfate from currently available data together with new measurements of 313 samples from 33 different formations bearing Earth's earliest unambiguous evaporites at 2.4 Ga through to Ediacaran aged deposits. This record depicts distinct intervals with respect to the expression of sulfate isotopes that are not completely captured by established intervals in the geologic timescale. The most salient pattern is the muted delta-17O signatures across the GOE, late Proterozoic and Ediacaran with values that are only slightly more negative than modern marine sulfate, contrasting with highly negative values across the mid-Proterozoic and Cryogenian. We combine these results with estimates of atmospheric composition to produce a gross primary production (GPP) curve for the Proterozoic. Through these results we argue that changes in GPP across Earth history likely help account for many of the changes in the Proterozoic Earth surface environment such as rising atmospheric oxygen, large fluctuations in the size of the marine sulfate reservoir and variations in the isotopic composition of sedimentary sulfate., Bedrock Geology, Lithology, Sedimentary Rocks, Evaporites, Sulphates, Carbonates, Barite, Pyrite, Sulphides, Isotopic Studies, Isotopes, Sulphur, Oxygen, Geological History, Biogeochemistry, Atmospheric Geochemistry, Paleoenvironment, Great Oxidation Event, Canada, Ontario, Northwest Territories, Nunavut, World, Zeitschrift
title	Claypool continued: Extending the isotopic record of sedimentary sulfate
title_auth	Claypool continued Extending the isotopic record of sedimentary sulfate
title_full	Claypool continued Extending the isotopic record of sedimentary sulfate
title_fullStr	Claypool continued Extending the isotopic record of sedimentary sulfate
title_full_unstemmed	Claypool continued Extending the isotopic record of sedimentary sulfate
title_in_hierarchy
title_short	Claypool continued
title_sort	claypool continued extending the isotopic record of sedimentary sulfate
title_sub	Extending the isotopic record of sedimentary sulfate
title_unstemmed	Claypool continued: Extending the isotopic record of sedimentary sulfate
topic	Bedrock Geology, Lithology, Sedimentary Rocks, Evaporites, Sulphates, Carbonates, Barite, Pyrite, Sulphides, Isotopic Studies, Isotopes, Sulphur, Oxygen, Geological History, Biogeochemistry, Atmospheric Geochemistry, Paleoenvironment, Great Oxidation Event, Canada, Ontario, Northwest Territories, Nunavut, World, Zeitschrift
topic_facet	Bedrock Geology, Lithology, Sedimentary Rocks, Evaporites, Sulphates, Carbonates, Barite, Pyrite, Sulphides, Isotopic Studies, Isotopes, Sulphur, Oxygen, Geological History, Biogeochemistry, Atmospheric Geochemistry, Paleoenvironment, Great Oxidation Event, Canada, Ontario, Northwest Territories, Nunavut, World, Zeitschrift
url	https://geoscan.nrcan.gc.ca/starweb/geoscan/servlet.starweb?path=geoscan/fulle.web&search1=R=314640