Tectonically reset Rb-Sr system during Late Ordov

详细信息      p://geology.geoscienceworld.org/content/15/12/1155.full.pdf">PDF全文下载

• journal_title：Geology
• Contributor：P. S. Kennan ; F. C. Murphy
• Publisher：Geological Society of America
• Date：1987-
• Format：text/html
• Language：en
• Identifier：10.1130/0091-7613(1987)15<1155:TRRSDL>2.0.CO;2
• journal_abbrev：Geology
• issn：0091-7613
• volume：15
• issue：12
• firstpage：1155

摘要

<p id="p-1">The uncertainty of a ca. 460 Ma age of mylonitization of acid igneous rocks in the western Irish Caledonides required reevaluation of the published Rb-Sr whole-rock data. We found that the data support an alternative ca. 426 ±10 Ma age of mylonitic resetting. This time of deformation relates to the assembly of suspect terranes during Late Ordovician closure of the lapetus ocean. p>