PDFs

Twentieth century d13C variability in surface water dissolved inorganic carbon recorded by coralline algae in the northern North Pacific Ocean and the Bering Sea

PDF of Williams, B, Halfar, J, Steneck, RS, Wortmann, UG, Hetzinger, S, Adey, W, Lebednik, P, and Joachimski, M (2011): Biogeosciences, 8(1):165–174. Located at portal path: http://www.geology.utoronto.ca/Members/wortmann/wortmann_bib/branwen2011

Early Aptian carbon and sulphur isotope signatures at ODP Site 765

PDF of DeBond, N, Oakes, RL, Paytan, A, and Wortmann, UG (2012): Isotopes in Environmental and Health Studies, 48(1):180-194. Located at portal path: http://www.geology.utoronto.ca/Members/wortmann/wortmann_bib/debond2012

Ammonium stability and nitrogen isotope fractionations for NH4+-NH3 (aq)-NH3 (gas) systems at 20-70 °C and pH of 2-13: Applications to habitability and nitrogen cycling in low-temperature hydrothermal systems

PDF of Li, L, Lollar, BS, Li, H, Wortmann, UG, and Lacrampe-Couloume, G (2012): Geochimica et Cosmochimica Acta, 84(0):280 - 296. Located at portal path: http://www.geology.utoronto.ca/Members/wortmann/wortmann_bib/Li2012

Paleo-redox conditions during OAE 2 reflected in Demerara Rise sediment geochemistry (ODP Leg 207)

PDF of Hetzel, A, Boettcher, ME, Wortmann, UG, and Brumsack, H (2009): Palaeogeography, Palaeoclimatology, Palaeoecology, 273(3 - 4):302 - 328. Located at portal path: http://www.geology.utoronto.ca/Members/wortmann/wortmann_bib/AlmutHetzel2009

Microbial sulfate reduction in deep sediments of the Southwest Pacific (ODP Leg 181, Sites 1119-1125): evidence from stable sulfur isotope fractionation and pore water modeling

PDF of Bottcher, ME, Khim, BK, Suzuki, A, Gehre, M, Wortmann, UG, and Brumsack, HJ (2004): MARINE GEOLOGY, 205:249–260. Located at portal path: http://www.geology.utoronto.ca/Members/wortmann/wortmann_bib/Bottcher2004

REMAP: A reaction transport model for isotope ratio calculations in porous media

PDF of Chernyavsky, BM and Wortmann, UG (2007): GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS, 8:Q02009. Located at portal path: http://www.geology.utoronto.ca/Members/wortmann/wortmann_bib/Chernyavsky2007

Gas hydrate occurrence from pore water chlorinity and downhole logs in a transect across the northern Cascadia margin (Integrated Ocean Drilling Program Expedition 311)

PDF of Malinverno, A, Kastner, M, Torres, ME, and Wortmann, UG (2008): Journal of Geophysical Research, 113. Located at portal path: http://www.geology.utoronto.ca/Members/wortmann/wortmann_bib/MalinvernoEtAl2008

Co-generation of hydrogen sulfide and methane in marine carbonate sediments

PDF of Mitterer, RM, Malone, MJ, Goodfriend, GA, Swart, PK, Wortmann, UG, Logan, GA, Feary, DA, and Hine, AC (2001): GEOPHYSICAL RESEARCH LETTERS, 28:3931–3934. Located at portal path: http://www.geology.utoronto.ca/Members/wortmann/wortmann_bib/Mitterer2001

Hydrogen sulfide-rich hydrates and saline fluids in the continental margin of South Australia

PDF of Swart, PK, Wortmann, UG, Mitterer, RM, Malone, MJ, Smart, PL, Feary, DA, and Hine, AC (2000): GEOLOGY, 28:1039–1042. Located at portal path: http://www.geology.utoronto.ca/Members/wortmann/wortmann_bib/Swart2000

Methane hydrate formation in turbidite sediments of northern Cascadia, IODP Expedition 311

PDF of Torres, ME, Trhu, AM, Cespedes, N, Kastner, M, Wortmann, UG, Kim, JH, Long, P, Malinverno, A, Pohlman, JW, Riedel, M, and Collett, T (2008): Earth and Planetary Science Letters, 271:170 - 180. Located at portal path: http://www.geology.utoronto.ca/Members/wortmann/wortmann_bib/Torres2008

Major-element analysis of cyclic black shales: Paleoceanographic implications for the Early Cretaceous deep western Tethys

PDF of Wortmann, UG, Hesse, R, and Zacher, W (1999): PALEOCEANOGRAPHY, 14:525–541. Located at portal path: http://www.geology.utoronto.ca/Members/wortmann/wortmann_bib/Wortmann1999

Hypersulfidic deep biosphere indicates extreme sulfur isotope fractionation during single-step microbial sulfate reduction

PDF of Wortmann, UG, Bernasconi, SM, and Bottcher, ME (2001): GEOLOGY, 29:647–650. Located at portal path: http://www.geology.utoronto.ca/Members/wortmann/wortmann_bib/Wortmann2001a

Alpine plate kinematics revisited: The Adria problem

PDF of Wortmann, UG, Weissert, H, Funk, H, and Hauck, J (2001): TECTONICS, 20:134–147. Located at portal path: http://www.geology.utoronto.ca/Members/wortmann/wortmann_bib/Wortmann2001b

Altered carbon cycling and coupled changes in Early Cretaceous weathering patterns: Evidence from integrated carbon isotope and sandstone records of the western Tethys

PDF of Wortmann, UG, Herrle, JO, and Weissert, H (2004): EARTH AND PLANETARY SCIENCE LETTERS, 220:69–82. Located at portal path: http://www.geology.utoronto.ca/Members/wortmann/wortmann_bib/Wortmann2004

A 300 m long depth profile of metabolic activity of sulfate-reducing bacteria in the continental margin sediments of South Australia (ODP Site 1130) derived from inverse reaction-transport modeling

PDF of Wortmann, UG (2006): GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS, 7:Q05012. Located at portal path: http://www.geology.utoronto.ca/Members/wortmann/wortmann_bib/Wortmann2006

Oxygen isotope biogeochemistry of pore water sulfate in the deep biosphere: Dominance of isotope exchange reactions with ambient water during microbial sulfate reduction (ODP Site 1130)

PDF of Wortmann, UG, Chernyavsky, B, Bernasconi, SM, Brunner, B, Boettcher, ME, and Swart, PK (2007): GEOCHIMICA ET COSMOCHIMICA ACTA, 71:4221–4232. Located at portal path: http://www.geology.utoronto.ca/Members/wortmann/wortmann_bib/Wortmann2007a

Effect of evaporite deposition on Early Cretaceous carbon and sulphur cycling

PDF of Wortmann, UG and Chernyavsky, BM (2007): NATURE, 446:654–656. Located at portal path: http://www.geology.utoronto.ca/Members/wortmann/wortmann_bib/Wortmann2007b

Zur Ursache der hemipelagischen schwarz/grün Zyklen im Apt/Alb der bayerischen Flyschzone

PDF of Wortmann, UG (1996): PhD thesis, Lehrstuhl für Allg., Ang. und Ing. Geol., TU–München, Germany. Located at portal path: http://www.geology.utoronto.ca/Members/wortmann/wortmann_bib/wortmann96