Lu-Hf isotopic systematics and their applications in petrology
Lu-Hf同位素体系及其岩石学应用

Lu-Hf is one of the isotopic dating and geochemical tracing techniques developed very rapidly during the past years.This paper presents a comprehensive review about the history,geochemical applications in petrology and remained problems surrounding the Lu-Hf isotope system.An overall introduction to the presently used sample digestion,mass spectrometric measurement and laser in-situ ablation techniques is also provided.The development of Hf isotopic systematies can be divided into 3 stages of TIMS,hot-SIMS and MC-ICP-MS,but the advent of MC-ICPMS accelerates their applications in petrology.After presenting the foundmantal geochemical behaviour and principles of the Lu-Hf isotope,this paper reviews its applications in petrology in details,including the isotopic dating of the garnet-and apatite-beraing rocks,early continental crustal formation and evolution,nature and petrogenesis of different mantle end- members,identification of various magmatic processes,regional geodynamic evolution and Hf isotopic variance during metamorphism. Finally,we discuss the uncertainties of ~(176)Lu decay constant,Hf isotopic ratios of commonly used standards of solution JMC475 and zircon/baddeleyite,and closure temperature of Hf isotopic systems.