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1
題名:Anhydrous Melting Experiment of a Wannienta Basalt in the Kuanyinshan Area, Northern Taiwan, at Atmospheric Pressure    
著者:Teh-Ching LiuBor-Ru ChenChen-Hong Chen
出版地區:台灣
出版城市:台北市
學科:地球科學
關鍵字:Basalt ; Kuanyinshan ; Fractional crystallization ; Magma
刊名:Terrestrial, Atmospheric and Oceanic Sciences
卷期:9卷2期(1998.6)
頁碼:165-182
語言:英語
摘要: 英文摘要PDF

A Wannienta basalt from Kuanyinshan, northern Taiwan, is studied using a high temperature furnace at atmospheric pressure. The purpose of this study is to investigate the crystallization sequence of the phenocrysts, to analyze the chemical compositions of the phenocrysts, and to estimate the evolution trend of the magma in the Kuanyinshan area. Fifteen runs are made to locate the liquidus temperature, the solidus temperature, and the melting interval of the Wannienta basaltic magma. The experimental temperatures range from 1087℃ to 1281℃. The duration is from five hours to nineteen hours. Compositions of glasses and phenocrysts are analyzed with an electron microprobe. The experimental results show that the liquidus temperature is located at 1270℃ and the solidus temperature is estimated to be dose to 1080℃. The melting interval is about 190℃. The liquidus minerals are oxides with compositions in spinel series. The following crystallized phase is olivine at about 1217℃. Plagioclase and clinopyroxene appear, respectively, at about 1178℃ and 1137℃. The evolution of the residual magma shows the chemical trend as: enrichment in silicon, aluminum, and alkalis; and depletion in calcium, iron, and magnesium with the decreasing temperature. The fractionation trend of the Kuanyinshan volcanic series is similar to the variation trend of the residual magmas. It implies that the depth for the fractional crystallization of the Wannienta basaltic magma to produce andesites could be modeled at low pressure. The fractionates to produce biotite bornblende andesitic magma could be oxides, olivine, plagioclase, and clinopyroxene.




本卷期目次
Terrestrial, Atmospheric and Oceanic Sciences 9卷2期 (1998.6)
Anhydrous Melting Experiment of a Wannienta Basalt in the Kuanyinshan Area, Northern Taiwan, at Atmospheric Pressure/ Teh-Ching LiuBor-Ru ChenChen-Hong Chen
Removing Bad Traces in Shallow Seismic Exploration/ Robert SunAmy Wang
The NTUGCM's AMIP Simulation on the East Asian Summer Monsoon/ Wen-Shung Kau
The Solar Wind Control of the Magnetopause Shape: A Comparison of A Model Magnetopause and Empirical Models/ Ching-Chang Cheng
Aerosol Optical Depth and Size Distribution Changes During the Total Solar Eclipse of 24 October 1995/ K. NiranjanS. Thulasiraman
Morphological and Seismic Characteristics of the North Mien-Hua Submarine Canyon off Northeastern Taiwan/ Ho-Shing YuMing-Lung Lee
The Possible Causes of the Crustal Low Resistive Zone for the Western Foothills, Taiwan/ Chien-Chih ChenChow-Son ChenLi-Chung Sun
Synthetic Seismogram for the Velocity and Attenuation Structure Near the Inner-Outer Core Boundary Using the Generalized Ray Method/ Bor-Shouh HuangZhen-Xing YaoYeong Tein Yeh
 
   
 
   

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