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1
題名:GEOCHEMISTRY OF LANHSU ANDESITES    
蘭嶼安山岩之地球化學研究
著者:Ju-Chin Chen(陳汝勤)
出版地區:台灣
出版城市:台北市
學科:地球科學
刊名:Science Reports of the National Taiwan University ACTA Oceanographica Taiwanica
卷期:6期(1976.12)
頁碼:77-87
語言:英語
摘要: 中文摘要PDF ; 英文摘要PDF

蘭嶼安山岩斑晶包括角閃石和斜長石、偶含輝石,但不含黑雲母。蘭嶼安山岩如同臺灣東部海岸山脈的安山岩,鈉、鎳含量與氧化鈉/全量鐵和氧化鈉/氧化鉀的比值較大屯山安山岩為高,而鈣、鐵、鉀、銣、鍶的含量則較低。蘭嶼安山岩中,氧化鎂、全量鐵、鉻、銣、和鎳的含量顯然與氧化鎂/全量鐵比值呈有系統的變化。在蘭嶼和海岸山脈安山岩中,鍶含量有向西增加之趨勢,由此推翻臺灣東部之班尼奧夫帶在中新世時,可能向大陸傾斜。由蘭嶼安山岩的化學成份看來,它不可能由菲律賓海海洋矽質玄武岩與深海沉積物混染而成。蘭嶼安山岩可能出海洋矽質玄武岩在淺於七十公里的隱沒帶上經由部份熔融而來。由於蘭嶼安山岩之主要元素和微量元素,皆呈有系統的變化顯示此等岩石在最初岩漿形成後,曾經過固一液平衡。
The Lanhsu andesites contain phenocrysts of hornblende and plagioclase only occasionally with pyroxene but without biotite. The Lanhsu andesites like the Coastal Range andesites have higher Na, Ni contents and higher MgO/Σ FeO, Na2O/K2O ratios but lower Ca, Fe, K, Rb, Sr contents than Tatun andesites. Consistent variation trends have been found in the plot of MgO, Σ FeO, K2O, Cr, Rb and Ni vs MgO/Σ FeO ratios of the Lanhsu andesites. The westward increase of Sr in andesites from Lanhsu and Coastal Range suggests that the Benioff zone in eastern Taiwan during Miocene might dip toward the continent. The chemistry of Lanhsu andesites can not be obtained by mixing of Philippine sea oceanic tholeiite with deep sea sediments. The Lanhsu andesites might have been formed by partial melting of oceanic tholeiite at the subduction zone at a depth less than 70 Km. The systematic major and trace element variations found in Lanhsu andesites indicate that the rocks might have been involved in crystal-liquid equilibrium after the formation of the initial liquid.


    

本卷期目次
Science Reports of the National Taiwan University ACTA Oceanographica Taiwanica 6期 (1976.12)
STUDY OF THE KUROSHIO CURRENT BETWEEN TAIWAN AND ISHIGAKIJIMA/ Tsu-You Chu
ELECTROPHORETIC STUDY OF THE MUSCLE EXTRACTS OF BULLET TUNA (AUXIS ROCHEI) IN WATERS AROUND TAIWAN/ Su-Zan YehRong-Tszong Yang
THE DEMERSAL FISH STOCKS OF THE WATERS OF NORTH AND NORTHWEST AUSTRALIA/ Hsi-Chiang Liu
STUDIES ON ALGIN FROM BROWN ALGAE OF TAIWAN I. ESTIMATION OF YIELD AND QUALITY OF ALGIN/ Hong-Nong ChouYoung-Meng Chiang
ECOLOGICAL AND MORPHOLOGICAL STUDY OF THE FISH-FAUNA FROM THE WATERS AROUND TAIWAN AND ITS ADJACENT ISLANDS 17. A study of sex reversal in a pomacanthid fish, Genicanthus semifasciatus (KAMOHARA)/ Shih-Chieh ShenChen-Hsiang Liu
ECOLOGICAL AND MORPHOLOGICAL STUDY OF THE FISH-FAUNA FROM THE WATERS AROUND TAIWAN AND ITS ADJACENT ISLANDS 20. Study on the goatfishes-Mullidae/ Shih-Chieh Shen
魚類族群仔稚時期餌料的消費和加入量之間的關係/ 王健雄
STRONTIUM DISTRIBUTION IN COASTAL RANGE ANDESITES, EASTERN TAIWAN/ Lu-Chin ChenTung-Wuu Huang
A NOTE ON THE SIGNIFICANT WAVE DERIVED FROM JONSWAP SPECTRUM/ Joe WangNai-Kuang Liang
COMMENT ON M. C. LIN'S PAPER ON INTERNAL WAVES IN A STRATIFIED INCOMPRESSIBLE FLUID
PROCESSES MODIFYING THE ISOTOPIC COMPOSITION OF DISSOLVED OXYGEN/ Woei-Lih Jeng
STUDY ON MERCURY IN THE WATERS, SEDIMENTS AND BENTHONIC ORGANISMS ALONG CHAI-I COASTAL AREA/ Tsu-Chang HungTsung-Tien Lin
TIDAL CURRENTS IN THE OFFSHORE AREA OF SU-AOU IN RELATION TO TIDES OF THE LAND STATION ALONG THE EAST COST OF TAIWAN/ K. ChengT. Y. Chu
ON THE STEADY STATE CURRENTS IN SHALLOW SEAS OR LAKES/ San-Lang Lien
DISTRIBUTION OF Na, Mg, Ca, K, Sr AND Li IN SEA WATERS FROM THE BASHI CHANNEL/ Hsien-Wen LiJu-Chin Chen
GEOCHEMISTRY OF LANHSU ANDESITES/ Ju-Chin Chen
NUMERICAL SIMULATION OF TURBULENT DISPERSION OF FINITE SIZE PARTICLES/ Wei-Chung Chen
ON UPWELLING ALONG THE EASTERN COAST OF TAIWAN: A REVIEW OF HYDROGRAPHIC AND CHEMICAL DATA/ Gudrun M. Bodvarsson
 
   
 
   

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