New look at the Siberian connection: No SWEAT

Research Article| May 01, 2000 New look at the Siberian connection: No SWEAT James W. Sears; James W. Sears 1Department of Geology, University of Montana, Missoula, Montana 59812, USA Search for other works by this author on: GSW Google Scholar Raymond A. Price Raymond A. Price 2Department of Geological Sciences, Queen's University, Kingston, Ontario K7L 3N6, Canada Search for other works by this author on: GSW Google Scholar Author and Article Information James W. Sears 1Department of Geology, University of Montana, Missoula, Montana 59812, USA Raymond A. Price 2Department of Geological Sciences, Queen's University, Kingston, Ontario K7L 3N6, Canada Publisher: Geological Society of America Received: 19 Nov 1999 Revision Received: 07 Feb 2000 Accepted: 16 Feb 2000 First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2000) 28 (5): 423–426. https://doi.org/10.1130/0091-7613(2000)28<423:NLATSC>2.0.CO;2 Article history Received: 19 Nov 1999 Revision Received: 07 Feb 2000 Accepted: 16 Feb 2000 First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation James W. Sears, Raymond A. Price; New look at the Siberian connection: No SWEAT. Geology 2000;; 28 (5): 423–426. doi: https://doi.org/10.1130/0091-7613(2000)28<423:NLATSC>2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract The Proterozoic connection between northeastern Siberia and western Laurentia that we proposed in 1978 is strongly supported by several new lines of evidence. New age data and refined structural trends in predrift basement rocks improve the resolution of the fit between the cratons. The mouth of the large river that is inferred to have provided the point source for the lower part of the Mesoproterozoic Belt-Purcell Supergroup in western Laurentia aligns with the Mesoproterozoic Udzha trough of Siberia. The elbow bend in the Udzha trough bypasses the Archean Wyoming Province to link the Belt-Purcell basin with Paleoproterozoic regions in southwest Laurentia having appropriate Nd crustal-residence ages and zircon crystallization ages to have provided sources for much of the sediment. The Grenville and Granite-Rhyolite provinces of southwest Laurentia provide sources for detrital zircons and felsic volcanic fragments in the east-derived Mesoproterozoic Mayamkan Formation of Siberia. The ages of mafic sills in the Sette-Daban region of Siberia overlap those in southwest Laurentia. Ediacara occur in off-shelf environments on both margins. The two margins have very similar latest Neoproterozoic–earliest Cambrian rift-drift signatures, including a breakup unconformity and Tommotian shelf assemblages that record the onset of thermally driven subsidence. Two possible submarine volcanoes with archeocyathan caps may confirm the establishment of Early Cambrian seafloor spreading.The Siberian–west Laurentian connection provides better correlations among prerift terranes than does the southwest United States–East Antarctic connection (SWEAT), and is more compatible with the overall geologic history of Laurentia and Gondwana. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.