河北地质大学学报2025，Vol.48Issue(3)：10-15,21,7.DOI:10.13937/j.cnki.hbdzdxxb.2025.03.002
大兴安岭索伦地区安山岩与粗安岩的岩浆混合过程:矿物地球化学证据
Magma Mixing Processes in Andesite and Trachyandesite in Suolun Area,Great Xing'an Range:Evidence from Mineral Geochemistry
摘要
Abstract
This study aims to investigate the magma mixing process and its genesis in andesites and dacites from the Suolun area in the Great Xing'an Range.The mineralogical and geochemical characteristics of the rocks were analyzed to study the mineral composition of the andesites and dacites,and their reflection of magma evolution.The research methods include chemical composition analysis of plagioclase and pyroxene minerals,focusing on the zonal characteristics of plagioclase phenocrysts and the compositional variations in pyroxene.The results indicate that the plagioclase phenocrysts in the andesite have a content ranging from 38.71 to 59.70,with some exhibiting clear oscillatory zoning,suggesting magma mixing.The andesites and dacites from the Suolun area originate from the mixing of intermediate to acidic magma with basic magma.As the temperature decreases,plagioclase phenocrysts begin to crystallize,and during the subsequent magma ascent,the filling of basic magma with intermediate-felsic magma results in mineralogical mixing.This study provides important mineralogical evidence for understanding the magma mixing process and its geological context in this area.关键词
火山岩/斜长石/矿物化学/岩浆混合/大兴安岭Key words
volcanic rock/plagioclase/mineral chemistry/magma mixing/Great Xing'an Range分类
地质学引用本文复制引用
陈琛昌,邢天娇,唐宗源,冯钊,刘育,王金佩..大兴安岭索伦地区安山岩与粗安岩的岩浆混合过程:矿物地球化学证据[J].河北地质大学学报,2025,48(3):10-15,21,7.基金项目
河北地质大学博士科研启动基金项目(BQ2024040) （BQ2024040）
河北省战略性关键矿产资源重点实验室开放基金(HGU-SCMR2424,HGU-SCMR2425) （HGU-SCMR2424,HGU-SCMR2425）
河北省自然科学基金资助项目(D2022403039) （D2022403039）
