Progress in Subduction-Related Boninite Research
Lin Ruolan
Wu Tao
Tian Liyan
Lu Jianggu
Abstract：Boninite is a special type of magnesium-iron volcanic rock,primarily formed in unique geological environments associated with plate subduction.It serves as a direct geological record of the subduction initiation.The phenocryst are mainly olivine and pyroxene,with no plagioclase.Boninite is characterized by high Mg and Si,but lower Ti content.They are also and enriched in large ion lithophile elements(LILEs)and light rare earth elements(LREEs),but depleted in high field strength elements(HFSEs)and medium rare earth elements(MREEs).Typicalboninite exhibits a distinctive"U"-shaped rare earth element(REE)distribution pattern.The unique chemical composition of boninite reflects its uniquemantle melting conditions,such as high temperature,low pressure,and relatively high water content.Primarymagma was generated throughre-melting processes in the mantle source,which has already undergone partial melting before.This unique melting process provides crucial insights into mantle source composition,degree of melting,and the role of fluids in mantle melting and the initiation of subduction.In this review,we discuss the mineralogy,geochemical characteristics,and petrogenetic mechanisms of subduction-related boninite,emphasizing its significance in geodynamics and magma evolution processes.Finally,we also summarized the current research issuesand potential future directions in boninite studies.
Keywords：boninitegeochemistrypetrogenesismantle meltingsubduction initiationsubduction zone
Publication Date：2025-08-30
Online Publishing Date：2025-08-22(First online date of this platform, not the publication date of the document)
Pages：21( 2956-2976 )