Age and tectonic significance of Permian granites in western Zanskar, High Himalaya
| Autor: | Michael P. Searle, C. B. Walker, Steve Noble |
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| Rok vydání: | 2001 |
| Předmět: | |
| Zdroj: | JOURNAL OF GEOLOGY. 109(1) |
| ISSN: | 1537-5269 0022-1376 |
| Popis: | Field and U‐Pb geochronology data are presented for two new occurrences of Permian Himalayan granites, at Parkatchic (at ca. 270 Ma) and Sankoo (at \documentclass{aastex} \usepackage{amsbsy} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{bm} \usepackage{mathrsfs} \usepackage{pifont} \usepackage{stmaryrd} \usepackage{textcomp} \usepackage{portland,xspace} \usepackage{amsmath,amsxtra} \usepackage[OT2,OT1]{fontenc} \newcommand\cyr{ \renewcommand\rmdefault{wncyr} \renewcommand\sfdefault{wncyss} \renewcommand\encodingdefault{OT2} \normalfont \selectfont} \DeclareTextFontCommand{\textcyr}{\cyr} \pagestyle{empty} \DeclareMathSizes{10}{9}{7}{6} \begin{document} \landscape $268\pm 5$ \end{document} Ma), western Zanskar. The granites were deformed during Late Eocene–Early Miocene metamorphism, and K‐Ar and Ar‐Ar systematics of micas and amphiboles were reset, as indicated by 40Ar/39Ar mica ages of 19–13 Ma. Permian granites from the High Himalaya were previously known only from one location but are... |
| Databáze: | OpenAIRE |
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