REE Tetrad Effect and Sr-Nd Isotope Systematics of A-Type Pirrit Hills Granite from West Antarctica
نویسندگان
چکیده
The Pirrit Hills are located in the Ellsworth–Whitmore Mountains of West Antarctica. granite exhibits significant negative Eu anomalies (Eu/Eu* = 0.01~0.25) and a REE tetrad effect indicating intensive magmatic differentiation. Whole-rock Rb-Sr Sm-Nd geochronologic analysis gave respective ages 172.8 ± 2.4 Ma with initial 87Sr/86Sr 0.7065 0.0087 169 12 144Nd/143Nd 0.512207 0.000017. isotopic ratio data indicate that formed by remelting Mesoproterozoic mantle-derived crustal materials. Both chondrite-normalized patterns Sr-Nd has geochemical features effects highly fractionated granites were produced from differentiation under magmatic-hydrothermal transition system.
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ژورنال
عنوان ژورنال: Minerals
سال: 2021
ISSN: ['2075-163X']
DOI: https://doi.org/10.3390/min11080792