A pulse of cryptic granulite-facies metamorphism in the Archean Wyoming Craton revealed by Sm-Nd garnet and U-Pb monazite geochronology
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- 作者：Besim Dragovica ; dragovic@vt.edu" class="auth_mail" title="E-mail the corresponding author ; Victor E. Guevaraa ; vguevara@vt.edu" class="auth_mail" title="E-mail the corresponding author ; Mark J. Caddicka ; caddick@vt.edu" class="auth_mail" title="E-mail the corresponding author ; Ethan F. Baxterb ; c ; baxteret@bc.edu" class="auth_mail" title="E-mail the corresponding author ; Andrew R.C. Kylander-Clarkd ; kylander@geol.ucsb.edu" class="auth_mail" title="E-mail the corresponding author
- 关键词：Metamorphism ; Wyoming Craton ; Garnet ; Sm&ndash ; Nd ; Monazite ; U&ndash ; Pb
- 刊名：Precambrian Research
- 出版年：2016
- 出版时间：September 2016
- 年：2016
- 卷：283
- 期：Complete
- 页码：24-49
- 全文大小：12485 K
文摘
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Sm–Nd garnet and U–Pb monazite geochronology elucidate the timing of high-temperature (HT) metamorphism.
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Granulite-facies metamorphism postdates Long Lake Magmatic Complex emplacement by at least 50 Ma.
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Adjacent, relatively anhydrous TTGs do not record wholesale (re)crystallization during HT event.
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Significant scatter in Sm–Nd garnet ages results from polymetamorphism and slow cooling.
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Diffusion modeling has shown that the HT event likely occurred for <1 Ma.