Early Proterozoic activity on Archean faults in the western Superior province— Evidence from pseudotachyliteстатья из журнала
Аннотация: Research Article| December 01, 1989 Early Proterozoic activity on Archean faults in the western Superior province— Evidence from pseudotachylite Zell E. Peterman; Zell E. Peterman 1U.S. Geological Survey, M.S. 963, Federal Center, Denver, Colorado 80225 Search for other works by this author on: GSW Google Scholar Warren Day Warren Day 1U.S. Geological Survey, M.S. 963, Federal Center, Denver, Colorado 80225 Search for other works by this author on: GSW Google Scholar Geology (1989) 17 (12): 1089–1092. https://doi.org/10.1130/0091-7613(1989)017<1089:EPAOAF>2.3.CO;2 Article history first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Zell E. Peterman, Warren Day; Early Proterozoic activity on Archean faults in the western Superior province— Evidence from pseudotachylite. Geology 1989;; 17 (12): 1089–1092. doi: https://doi.org/10.1130/0091-7613(1989)017<1089:EPAOAF>2.3.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 Major transcurrent faults in the Superior province developed in the Late Archean at the close of the Kenoran orogeny. Reactivation of some of these faults late in the Early Proterozoic is indicated by Rb-Sr analyses of pseudotachylite from the Rainy Lake-Seine River and Quetico faults in the Rainy Lake region of Minnesota and Ontario. Fault veins of pseudotachylite and immediately adjacent country rock at two localities yielded subparallel isochrons that are pooled for an age of 1947 ±23 Ma. K-Ar and Rb-Sr biotite ages register earlier regional cooling of the terrane at about 2500 Ma with no evidence of younger thermal overprinting at temperatures exceeding 300 °C. Accordingly, the 1947 ±23 Ma age is interpreted as dating the formation of the pseudotachylite. Reactivation of existing faults at this time was caused by stresses transmitted from margins of the Superior province where compressional tectonic events were occurring. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
Год издания: 1989
Авторы: Zell E. Peterman, Warren C. Day
Издательство: Geological Society of America
Источник: Geology
Ключевые слова: Geological and Geochemical Analysis, earthquake and tectonic studies, Geology and Paleoclimatology Research
Открытый доступ: closed
Том: 17
Выпуск: 12
Страницы: 1089–1089