CT理论与应用研究2025，Vol.34Issue(5)：826-829,4.DOI:10.15953/j.ctta.2025.176
俯冲起始与基性岩浆侵入:重新思考中国南海与吕宋的构造联系
Subduction Initiation and Mafic Intrusions:Rethinking the South China Sea-Luzon Connection
摘要
Abstract
The conventional view suggests that the subduction of the South China Sea plate beneath Luzon occurred due to the oceanic lithosphere's high density,facilitating subduction initiation.However,before the South China Sea opened,a continental margin likely existed,meaning that Luzon was directly adjacent to the continental margin rather than the oceanic basin.This would make subduction initiation more challenging.Here,we propose a new model suggesting that during the formation of the South China Sea,extensive mafic magmatic underplating occurred along its continental margin.The high-density magmatic additions may have increased the overall density of the continental margin,potentially exceeding that of Luzon,thereby enabling subduction to proceed.关键词
马里拉海沟/基性岩侵入体/吕宋/俯冲起始Key words
Manila Trench/mafic intrusions/Luzon/subduction initiation分类
天文与地球科学引用本文复制引用
何小波,何明澧,王星月,赵明辉,董淼..俯冲起始与基性岩浆侵入:重新思考中国南海与吕宋的构造联系[J].CT理论与应用研究,2025,34(5):826-829,4.基金项目
The authors acknowledge support from the National Natural Science Foundation of China(Grant No.42276049). （Grant No.42276049）
