Bunbury Basalt: Gondwana breakup products or earliest vestiges of the Kerguelen mantle plume?
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- 作者：Hugo K.H. Olierooka ; b ; h.olierook@liverpool.ac.uk" class="auth_mail" title="E-mail the corresponding author ; Fred Jourdana ; c ; Renaud E. Merlea ; d ; Nicholas E. Timmsa ; Nick Kusznirb ; Janet R. Muhlinga ; e
- 关键词：large igneous provinces ; Perth Basin ; continental flood basalts ; crustal basement thickness ; western Australian margin ; 40Ar/39Ar geochronology
- 刊名：Earth and Planetary Science Letters
- 出版年：2016
- 出版时间：15 April 2016
- 年：2016
- 卷：440
- 期：Complete
- 页码：20-32
- 全文大小：4511 K
文摘
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The Bunbury Basalt is a series of lava flows in southwestern Australia.
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The Bunbury Basalt erupted in three phases at ca. 137, 133 and 130.5 Ma.
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Geochemistry and geographical distances permit plume origin for Bunbury Basalt.
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The oldest Bunbury Basalt ages are synchronous with the breakup of eastern Gondwana.
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Alternatively, the basalts were generated from a patch of enriched shallow mantle.