锆石多元同位素及微量元素示踪岩石成因研究的进展及应用

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Recent advances in tracing petrogenesis through Zircon multi-isotopes and trace elements

ZHU Renzhi，WANG Rongzhang，ZHANG Yu （State KeyLaboratoryofContinentalEvolutionandEarlyLife/DepartmentofGeology，NorthwestUniversity，Xi'an79，Cina） AbstractZircon is ubiquitously distributed in magmatic，metamorphic，and sedimentary rocks of the solid Earth.Owing to its exceptional stability under high temperatures and weathering conditions， zircon preserves critical information about the crystalization age，temperature，oxygen fugacity，and geochemical characteristics of its host rocks，making it a vital tool for studying petrogenesis and deep Earth processes.This paper provides a preliminary analysis of recent advances in zircon applications for petrogenetic research. Zircon contains abundant radioactive isotopes and their stable decay products. Notably，the decay of 238U to 206Pb ， 235 U to 207Pb ，and 232Th 0 208Pb enables the U-Pb isotopic decay system to serve as the most reliable method fordetermining the crystallization age of zircon-bearing rocks. Additionally， the decay of 176 Lu to 176Hf in zircon allows the Lu-Hf isotopic system to effectively trace the magma source regions of host rocks. Meanwhile，the oxygen stable isotopes （ ） in zircon faithfully record the oxygen isotopic signature of its source，providing insights into the crustal or mantle affinity of the parental material. The recently developed zircon Zr stable isotope system ofers novel perspectives for understanding magmatic processes，such as tracking felsic magma diferentiation and dynamic magma evolution.Furthermore，trace elements（e.g.，Ti，Ce，Eu） within the zircon lattice can be utilized to construct thermometers and oxygen fugacity sensors，quantitatively constraining physicochemical parameters like crystallization temperature and redox conditions.Methods based on zircon isotopic systems （U-Pb，Lu-Hf，O， Zr），thermometers，and oxygen fugacity meters have played a significant scientific role in petrogenetic studies.As a robust scientific medium，zircon remains indispensable for geoscientists and will continue to addressfundamental questions in Earth and planetary sciences，from crustal evolution to magmatic dynamics.

KeywordsZircon； multi-isotopic systems ； Zircon oxybarometer; Zircon geothermometer； petrogenesis

锆石的化学成分为 ZrSiO4 ，其颜色有玫瑰色、紫色、黄色，或近于无色，金刚光泽。（剩余27445字）