| 汉诺坝玄武岩的主要特征及其形成的T、P、fo_2条件 |
| |
| 引用本文： | 邱家骧,李昌年,李增田.汉诺坝玄武岩的主要特征及其形成的T、P、fo_2条件[J].岩石矿物学杂志,1986,5(3):193-203. |
| |
| 作者姓名： | 邱家骧 李昌年 李增田 |
| |
| 作者单位： | 武汉地质学院
(邱家骧，李昌年)，武汉地质学院(李增田) |
| |
| 摘 要： | 汉诺坝玄武岩主要为由拉斑玄武岩系列与碱性玄武岩系列岩石组成的高原玄武岩。喷发时代为晚第三纪,喷发类型为裂隙式。一、玄武岩、巨晶、包体的组成常见的玄武岩种属为石英拉斑玄武岩、橄榄拉斑玄武岩、碱性橄榄玄武岩及碧玄岩,以碱性玄武岩系列较为少见。在碱性玄武岩系列中,常见巨晶及包体。巨晶有镁铝榴石、普通
|
The Main Characteristics of Hannuoba Basalts and the T .P .fo2 Conditions in their Formation |
| |
| Abstract: | Hannuoba basalts consisted of tholeiite and alkali-basalt series. The latter
contain Iarge amount of type I and minor type II inclusions, and augite and
anorthoclase megacryst, which in the extrusive basalts display the characteristics
of gravitational and flowage differentiation.
The results evaluated from different geothermometers and geobarmeters
indicate that the pressures in formation of type I inclusion range from 1.4-
3.1GPa, augite megacryst-2 .i-3.1GPa, basanite 4 magma-3 .1GPa, alk-Ol-basalt
magma-2.7GPa, Ol-tholeiitic magma-1.05GPa and Q.-tholeiitic magma-0.45GPa.
The fo2 in formation of alk-basaltic magma series vas higher (about 1.1×
10-4-3.8×10-5 atm) than that of tholeiite magma series (about 1.8×10-6-1.6
×10-7 atm). |
| |
| Keywords: | |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《岩石矿物学杂志》浏览原始摘要信息 |
| 点击此处可从《岩石矿物学杂志》下载免费的PDF全文 |
|
