Dissolution of pyrochlore and microlite in alkaline, sub-aluminous and high-aluminous granitoid melts

V. Chevychelov, A. A. Virus, Y. Shapovalov
{"title":"Dissolution of pyrochlore and microlite in alkaline, sub-aluminous and high-aluminous granitoid melts","authors":"V. Chevychelov, A. A. Virus, Y. Shapovalov","doi":"10.31857/s0869-56524896626-630","DOIUrl":null,"url":null,"abstract":"The represented experimental data on the Ta and Nb contents in acidic magmatic melts of different compositions, when dissolving pyrochlore and microlite at T = 650850 C and P = 100400 MPa, make it possible to obtain quantitative characteristics to create physico-chemical models of the genesis of TaNb deposits. At pyrochlore dissolution in granitoid melts at P = 100 MPa, the highest Nb content (0,71,9 wt.%) is obtained in alkaline melts, it decreases to 0,060,38 wt.% in sub-aluminous melts, and then slightly increases to 0,110,41 wt.% in high-alumina melts. An increase in temperature increases the dissolution of pyrochlore, and an increase in pressure decreases its. In high-alumina granite melts the pyrochlore is unstable. At the microlite dissolves with the increase in the alumina-rich melt, the Nb/Ta ratio in the melt increases approximately doubles.","PeriodicalId":24047,"journal":{"name":"Доклады Академии наук","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2019-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Доклады Академии наук","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.31857/s0869-56524896626-630","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0

Abstract

The represented experimental data on the Ta and Nb contents in acidic magmatic melts of different compositions, when dissolving pyrochlore and microlite at T = 650850 C and P = 100400 MPa, make it possible to obtain quantitative characteristics to create physico-chemical models of the genesis of TaNb deposits. At pyrochlore dissolution in granitoid melts at P = 100 MPa, the highest Nb content (0,71,9 wt.%) is obtained in alkaline melts, it decreases to 0,060,38 wt.% in sub-aluminous melts, and then slightly increases to 0,110,41 wt.% in high-alumina melts. An increase in temperature increases the dissolution of pyrochlore, and an increase in pressure decreases its. In high-alumina granite melts the pyrochlore is unstable. At the microlite dissolves with the increase in the alumina-rich melt, the Nb/Ta ratio in the melt increases approximately doubles.
焦绿石和微石在碱性、亚铝和高铝花岗岩类熔体中的溶解
在T = 650850℃、P = 100400 MPa条件下,对不同组成的酸性岩浆熔体溶解焦绿石和微岩石时Ta和Nb含量的代表性实验数据,为建立TaNb矿床成因的物理化学模型提供了定量特征。当P = 100 MPa时,花岗岩类熔体中焦绿石的铌含量在碱性熔体中最高(0,71,9 wt.%),在亚铝熔体中铌含量下降至0,60,38 wt.%,在高铝熔体中略有增加至0,110,41 wt.%。温度升高会增加焦绿石的溶解度,压力升高会降低其溶解度。在高铝花岗岩熔体中,焦绿石是不稳定的。当微晶岩溶解时,随着富铝熔体的增加,熔体中的Nb/Ta比增加约一倍。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
自引率
0.00%
发文量
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信