冀东洒河桥构造带泥质麻粒岩变质作用及锆石年代学研究

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中图分类号：P588.3 文献标识码：A 文章编号：2097-5465（2025）03-0001-09

University，Shijiazhuang ，China

Abstract：TheeasternHebeiregionislocatedinthenorthwestoftheLonggangBlockoftheNorthhinaCraton.Previousstudies haveconducted extensiveresearchonEarlyPrecambrianrocksinthisregion，whereasresearchonthemetamorphismof pelitic granulitesfromthSaheqiaolinea-structuralbeltisrelativelylimited.Tisstudyselectsrepresentativepeliticgranulitesample （JD1416）andconductssystematicinvestigationsinpetrology，majorelementgeochemistry，zirconU-Pbgeochronology，and metamorphicphaseequilibriummodeling.Themineralassemblageofpelicgranulitesisprimarilycomposedof garet，biotite， plagioclase，K-feldsparandquartz.Biotitecommonlysuoundsorrossutsgaet，diatingtatitfoedaterthangaet. Single-mineralelectronmicroprobeanalysisrevealsthatgaretexibitszningcharacteristicswithadecreaseinpyropecontentfrom thecoretotherimandanincreaseingrossularcontent.Plagioclaseispredominantlyandesineincomposition，showing no significantcomposionalzoning.Phasequilibriummodelingresultsshowthatthesolidusassemblageofpelitc granulitescostrains

来稿日期：2025-03-18 DOI：10.13937/j.cnki.hbdzdxxb.2025.03.001

基金项目：河北省自然科学基金（D2024403070）；河北地质大学博士科研启动基金（BQ2024012）

作者简介：谢天鸽（1995一），女，河北衡水人，矿物学、岩石学、矿床学专业硕士研究生。（剩余7966字）