Tectonic events reflected by palaeocurrents, zircon geochronology, and palaeobotany in the Sierra Baguales of Chilean Patagonia

详细信息    查看全文

• 关键词：Andean tectonics ; Patagonian Transgression ; Zircon provenance ; Gondwana reconstruction ; Antarctic Peninsula
• 刊名：Tectonophysics
• 出版年：2017
• 出版时间：16 January 2017
• 年：2017
• 卷：695
• 期：Complete
• 页码：76-99
• 全文大小：6498 K
• 卷排序：695

文摘

Palaeocurrents indicate sources varying from the NE to SW since the Late Cretaceous. This trend is confirmed by detrital zircon age populations. The SE provenance during the Lutetian is identified as a NE extension of the Antarctic Peninsula. The directional change coincided with uplift of the Southern Patagonian Andes. Fossil leaves confirm the creation of a rain shadow E of the Andes at ~ 34 Ma.