| back | publications from the Biogeochem Lab | ||
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Research in the Biogeochemistry Lab at UMass addresses fundamental unanswered questions of carbon cycling important over large scales of time and space. On the broadest level, these questions include:
To
address these questions, the Lab employs tools and techniques from
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Research Support generously provided by:
and a growing number of private companies from the natural gas industry |
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Active Research Projects: 1. Isotopic and molecular biological signatures of gas (CH4, CO2) generation in ancient sedimentary rocks from active subsurface microbial communities. Poster from 2004 GSA meeting available as PDF.
2. Isotopic and molecular diagnostics of ancient sedimentary rocks as sources of aged organic matter in modern river systems
3. Offshore mobilization of aged organic matter in response to Hurricane Katrina
Pending Research Projects: 1. Storage, Transformation and Release of Carbon from Coastal Wetlands under Rising Sea Level. This project will investigate changes in the distribution, composition and abundance of carbon pools (sedimentary, POC and DOC) along and adjacent to coastal wetlands in response to subsidence and coastal erosion associated with rising sea level.
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2005 Martini, A.M., Nüsslein, K., and Petsch, S.T. (2005) Enhancing microbial gas from unconventional reservoirs: Geochemical and microbiological characterization of methane-rich fractured black shales. Gas Technology Institute – Research Partnership to Secure Energy for America . Report GRI-05/0023 . R. Siegfried, ed. 42 p. Martini, A.M., Nüsslein, K., Petsch, S.T. (2005) Enhancing Microbial Gas From Unconventional Reservoirs: Geochemical And Microbiological Characterization Of Methane-Rich Fractured Black Shales. Spring 2005 Gas Tips - Newsletter of the Gas Technology Institute, (invited manuscript). p. 3-7. Petsch, S.T. , Edwards, K.J., and Eglinton, T.I. (2005) Microbial degradation of sedimentary organic matter. Palaeogeography, Palaeoclimatology, Palaeoecology (special issue: Geobiology)219, 157-170. invited manuscript. 2004 Raymond, P.A., Bauer, J.E., Caraco, N.F., Cole, J.J., Longworth, B.E., and Petsch, S.T. (2004) Controls on the variability of organic matter and dissolved inorganic carbon age in northeast U.S. rivers. Marine Chemistry (special issue honoring John Hedges) 92, 353-366. invited manuscript. Wildman, R.A., Berner, R.A., Petsch, S.T., Bolton , E.W., Eckert, J.O., Mok, U. and Evans, J.B. (2004) The weathering of sedimentary organic matter as a control on atmospheric O 2: I. Analysis of a black shale. American Journal of Science 304, 234-249. 2003 Petsch, S.T. (2003) Ch. 11: The Global Oxygen Cycle. Treatise on Geochemistry (H.D. Holland and K.K. Turekian, eds.), vol. 8 Biogeochemstry (W.H. Schlesinger, ed.). Invited book chapter. p. 515-556, Elsevier Science, Amsterdam . Petsch, S.T. , Edwards, K.J., and Eglinton, T.I. (2003) Abundance, distribution and d 13C analysis of microbial phospholipid-derived fatty acids in a black shale weathering profile. Organic Geochemistry34, 731-743. 2002 Jaffe, L.A. , Peucker-Ehrenbrink, B., and Petsch, S.T. (2002) Effects of weathering of organic-rich sedimentary rocks on the mobility of rhenium, platinum-group elements and organic carbon. Earth and Planetary Science Letters. 198, 339-353. 2001 Petsch, S.T. , Eglinton, T.I., and Edwards, K.J. (2001) 14C-dead living biomass: evidence for microbial assimilation of ancient organic carbon during shale weathering. Science, 292, 1127-1131 Petsch, S.T. , Smernik, R.J., Eglinton, T.I., and Oades, J.M. (2001) A solid state 13C NMR study of kerogen degradation during black shale weathering. Geochimica et Cosmochimica Acta ,65, 1867-1882. Petsch, S.T. , (2001) The carbon cycle and atmospheric evolution. Marella, Newsletter of the Yoho-Burgess Shale Foundation. N° 14. M. Coppold, ed. 2000 Berner, R.A., Petsch, S.T., Beerling, D.J., Popp, B.N., Lane, R.S., Laws, E.A., Westley, M.B., Cassar, N. Woodward, F.I., and Quick, W.P. (2000) Isotope fractionation and atmospheric oxygen: implications for Phanerozoic O 2 Evolution. Science, 287, 1630-1633. Petsch, S.T. , Berner, R.A., and Eglinton, T.I. (2000) A field study of the chemical weathering of ancient sedimentary organic matter. Organic Geochemistry, 31,475-487. 1999 Petsch, S.T. (1999) Comment on “Carbon isotope ratios of Phanerozoic marine cements: re-evaluating global carbon and sulfur systems”. Geochimica et Cosmochimica Acta, 63, 307-310. 1998 Berner, R.A. and Petsch, S.T. (1998) The sulfur cycle and atmospheric oxygen. Science, 282, 1426-1427. Petsch, S.T. and Berner, R.A. (1998) Coupling the geochemical cycles of C, P, Fe and S: the effect on atmospheric O 2 and the isotopic records of carbon and sulfur. American Journal of Science, 298, 246-262.
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