R6: Plutonic rocks, volcanic rocks and subduction factory

[R6P-03] Diversity of granitic rocks in the North Patagonian Batholith

「発表賞エントリー」

*Hirokazu Miura¹, shin-ichi kagashima¹, Toshiro Takahashi², Rikako Nohara² (1. Yamagata Univ., Sci, 2. Niigata Univ., Sci)

Keywords:Patagonian Batholith, Miocene granite

The North Patagonian Batholith was formed by plutonic events that took place between the Jurassic Period and the Miocene Epoch. The Miocene granitic rocks from Puerto Cisnes distributed in north Chilean Patagonia are divided into three parts : PCG, QDT, and QDP. Initial Sr and Nd ratios of these rocks are 0.70351-0.70549 and 0.51264-0.51287, respectively. Some of the granitic rocks in this area show similar values to the SrI of the metasedimentary rock, which suggests the possibility of their assimilation with crustal materials.