Pikes Peak batholith (Colorado, USA) revisited: A SIMS and LA-ICP-MS study of zircon U-Pb ages combined with solution Hf isotopic compositions

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Pikes Peak batholith (Colorado, USA) revisited: A SIMS and LA-ICP-MS study of zircon U-Pb ages combined with solution Hf isotopic compositions

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作者：Martin Guitreau^a ; ^{m.guitreau@opgc.univ-bpclermont.fr" class="auth_mail" title="E-mail the corresponding author} ; Samuel B. Mukasa^a ; Janne Blichert-Toft^b ; Maria F. Fahnestock^a
关键词：Pikes Peak batholith ; Zircon ; U&ndash ; Pb ages ; Hf isotopes ; Proterozoic
刊名：Precambrian Research
出版年：2016
出版时间：July 2016
年：2016
卷：280
期：Complete
页码：179-194
全文大小：1745 K

文摘

•: We studied the Lake George ring complex which is part of the Pikes Peak batholith.
•: Our new U–Pb ages show that the Lake George ring complex started to form at 1115 Ma.
•: New U–Pb ages also indicate that the Lake George ring complex formed over ⩾27 My.
•: Our new Hf isotopic data indicate sequential tapping of mantle and crustal sources.
•: This study calls for a general reassessment of Pikes Peak batholith emplacement age.

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