Abstract
Zircon U-Pb and Hf isotopic constraints on the magmatic evolution of the Northern Luzon Arc
Highlights
The Northern Luzon Arc (NLA) consists of the Coastal Range (CR) of Taiwan and volcanic islands between Taiwan and Luzon Island, e.g., the Lutao and Lanyu Islands (Fig. 1a)
The CR refers to the region that has collided with the Eurasian continental margin, and it consists of volcanoes with complete volcanic sequences that can be used to study the magmatic and tectonic evolution of the NLA
We report the in situ analyses of zircon U-Pb ages and Lu-Hf isotopes for volcanic rocks from individual volcanic sequences of these four major volcanoes in the CR
Summary
The Northern Luzon Arc (NLA) consists of the Coastal Range (CR) of Taiwan and volcanic islands between Taiwan and Luzon Island, e.g., the Lutao and Lanyu Islands (Fig. 1a). The closure temperature of the U-Pb isotopic system in zircon is very high; it can still yield accurate age information following hydrothermal alteration For these reasons, the zircon U-Pb dating method is suitable for the analysis of volcanic rocks in the CR. We report the in situ analyses of zircon U-Pb ages and Lu-Hf isotopes for volcanic rocks from individual volcanic sequences of these four major volcanoes in the CR. These results reflect the occurrence of several significant and different volcanic processes in each volcano. Based on the ages and isotopic compositions of these six volcanoes, the petrogenesis of the NLA can be determined
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