岩石矿物学杂志2024，Vol.43Issue(4)：847-855,9.DOI:10.20086/j.cnki.yskw.2024.0404
江西金滩岩体花岗岩的侵位深度
The emplaced depth of the granite from Jintan pluton:Constraints from mineral chemistry of muscovite
摘要
Abstract
Muscovite is a common mineral in peraluminous granites,it could be a mineral barometer to constrain the emplacement depth of peraluminous granites.Chemical compositions of muscovite from the Jintan two-mica granite are determined using electron microprobe.According to the calculation for the crystallization pressure of the muscovite,the pressure of emplacement of the Jintan pluton is 4.9×108～6.1×108 Pa with average 5.4×108 Pa,corresponding to 16～20 km with average 18 km in depth.Combing with previous studies,we suggest that the em-place depth is 17～19 km,and we can presume that crustal thickness of South China in the Indosinian period was likely ≥50 km,but it may be denudated because of extensive weathering in the Yanshanian period,which can be a new explanation for the lacking Indosinian volcanic rocks in South China.关键词
华南/花岗岩/金滩岩体/白云母/侵位深度Key words
South China/granite/Jintan pluton/muscovite/emplace depth分类
天文与地球科学引用本文复制引用
陶继华,杨跃贵,张吉源,石争,许德如..江西金滩岩体花岗岩的侵位深度[J].岩石矿物学杂志,2024,43(4):847-855,9.基金项目
国家自然科学基金(41963002,42063001) （41963002,42063001）
江西省大气污染成因与控制重点实验室开放基金(AE2104) National Natural Science Foundation of China(41963002,42063001) （AE2104）
The Open Foundation of Jiangxi Province Key Laboratory of the Causes and Control of Atmospheric Pollution,East China University of Tech-nology(AE2104) （AE2104）
