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dc.contributor.authorBartley, Julie K.
dc.contributor.authorSemikhatov, Mikhail A.
dc.contributor.authorKaufman, Alan J.
dc.contributor.authorKnoll, Andrew Herbert
dc.contributor.authorPope, Michael C.
dc.contributor.authorJacobsen, Stein B.
dc.date.accessioned2010-02-18T19:24:57Z
dc.date.issued2001
dc.identifier.citationBartley, Julie K., Mikhail A. Semikhatov, Alan J. Kaufman, Andrew H. Knoll, Michael C. Pope, and Stein B. Jacobsen. 2001. Global events across the Mesoproterozoic-Neoproterozoic boundary: C and Sr isotopic evidence from Siberia. Precambrian Research 111, no. 1-4: 165-202.en_US
dc.identifier.issn0301-9268en_US
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:3659700
dc.description.abstractThick, unmetamorphosed successions of siliciclastic and carbonate rocks in eastern and western Siberia preserve a record of Middle Riphean to Early Upper Riphean sedimentary environments and geochemistry. Consistent with data from other continents, our studies in the Uchur-Maya region in southeastern Siberia and the Turukhansk Uplift in northwestern Siberia suggest a first-order shift in delta C-13 from values near 0 parts per thousand in the early Mesoproterozoic to values near +3.5 parts per thousand after about 1300 Ma. Over this same interval, primary Sr-87/Sr-86 values decrease from > 0.7060 to < 0.7053. Combining lithologic, biostratigraphic, and geochemical data sets with available geochronologic constraints, we present a refined correlation between these two key Proterozoic successions in Siberia and add this dataset to a growing body of C and Sr isotopic data from this time interval, Carbon isotope chemostratigraphy from these regions supports the occurrence and timing of a first-order, similar to 3.5 parts per thousand positive shift ca. 1250-1300 Ma, approximately coeval with the onset of active margin activity that predates the main phase of Rodinia assembly. Sr isotopic data may also be interpreted within the context of the evolving Mesoproterozoic tectonic regime. Available data suggest that no dramatic rise in Sr-87/Sr-86 heralds the main phase of Rodinia assembly in the terminal Mesoproterozoic, suggesting that significant juvenile crust was involved in mountain building, that relative hydrothermal flux from mid-ocean ridges remained high throughout the assembly of Rodinia and/or that increased continental runoff related to intense erosion of Grenvillian mountain belts terminated shortly after orogeny.en_US
dc.description.sponsorshipEarth and Planetary Sciencesen_US
dc.description.sponsorshipOrganismic and Evolutionary Biologyen_US
dc.language.isoen_USen_US
dc.publisherElsevieren_US
dc.relation.isversionofhttp://dx.doi.org/10.1016/S0301-9268(01)00160-7en_US
dc.relation.hasversionhttp://www.geol.umd.edu/~kaufman/pdf/Bartley_01.pdfen_US
dash.licenseMETA_ONLY
dc.subjectSr-isotopeen_US
dc.subjectC-isotopeen_US
dc.subjectSiberiaen_US
dc.subjectProterozoicen_US
dc.subjectcarbonateen_US
dc.subjectchemostratigraphyen_US
dc.titleGlobal Events Across the Mesoproterozoic-Neoproterozoic Boundary: C and Sr Isotopic Evidence from Siberiaen_US
dc.typeJournal Articleen_US
dc.description.versionVersion of Recorden_US
dc.relation.journalPrecambrian Researchen_US
dash.depositing.authorKnoll, Andrew Herbert
dash.embargo.until10000-01-01
dc.identifier.doi10.1016/S0301-9268(01)00160-7*
dash.contributor.affiliatedJacobsen, Stein
dash.contributor.affiliatedKnoll, Andrew


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