验证岛弧埃达克岩的成因机制是俯冲系统物质循环的前沿科学课题之一。对岛弧埃达克岩成因机制的研究仍然存在激烈的争论。通过选择合适的研究对象，多角度综合制约埃达克岩源区属性和岩浆演化过程是验证岛弧埃达克岩成因机制的关键。吕宋弧Bataan段北部受南海黄岩岛链和南海古扩张脊俯冲影响，发育大量上新世-更新世埃达克岩，其Sr-Nd同位素组成显示埃达克岩源区含有俯冲的南海黄岩岛链海山组分，是验证岛弧埃达克岩成因机制的绝佳对象。本项目拟对Bataan北部埃达克岩开展全岩Hf-B同位素和埃达克岩中角闪石斑晶原位元素分析，通过限定其源区属性和岩浆演化过程，综合制约埃达克岩的成因。本项目的实施可以拓展岛弧埃达克岩研究的广度和深度，为验证岛弧埃达克岩的成因机制提供新的思路。

Testing the petrogenesis of the arc adakite is one of the frontier scientific issues in the materials cycling in modern subduction systems. However, hot debates remain on the petrogenesis of the arc adakite. The keys to investigating the petrogenesis of arc adakite is to choose suitable targets and to constrain the source characteristics and magmatic process of arc adakite by multiple geochemical methods. There are abundant Miocene-Pleistocene adakites distributed in the northern Bataan segment of Luzon arc. They are related to the subduction of the Huangyan Seamounts chain and the fossil spreading center of the South China Sea. The northern Bataan adakites exhibit Sr-Nd isotope composition similar to those of the South China Sea seamount basalts, suggestive of control of subducted Huangyan Seamounts chain materials in the source. This feature makes the northern Bataan adakites perfect targets to investigate the adakite petrogenesis. This proposal intends to cast constraints on source characteristics and magmatic processes of the Bataan adakites by carrying out whole rock Hf-B isotopic and amphibole in-situ element study, which in turn, would cast constraints on investigating the petrogenesis of the arc adakites. This program would deepen and widen the understanding of the study on the arc adakites and shed new lights on testing the petrogenesis of the arc adakites.