Petrology and Geochemistry of Oldoinyo Lengai Lavas Extruded in November 1988: Magma Source, Ascent and Crystallization
Petrology and Geochemistry of Oldoinyo Lengai Lavas Extruded in November 1988: Magma Source, Ascent and Crystallization
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1988 年 11 月喷出的 Oldoinyo Lengai 熔岩的岩石学和地球化学：岩浆源头、上升和结晶
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发表时间：
1995
期刊：
影响因子：
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通讯作者：
A. Fallick
中科院分区：
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作者：
J. Dawson;H. Pinkerton;G. Norton;D. Pyle;P. Browning;D. Jackson;A. Fallick
1988年11月，奥多尼约伦盖火山喷发的熔岩携带碱性碳酸盐闪锌矿和灰晶石斑晶，包裹体为磷灰石。它们以(Mn，Fe)S、MnFe尖晶石、钠钾矿、富钠、富硅磷灰石、闪锌矿等微斑晶为基质，并与钾铁矿、萤石共生，形成类似钠铁矿的晶相。基质中还含有一种未知的复杂碳酸盐？钙、钡、锶、钾和钠的含量。所有相都代表固溶体(归因于化学复杂的以碳酸盐为主的液体的高温结晶)，这是非常罕见的或以前没有报道过的。
Lavas erupted from Oldoinyo Lengai in November, 1988, carry phenocrysts of the alkali carbonates nyerereite and gregoryite, with inclusions of apatite. They are set in a matrix of microphenocrysts of nyerereite and gregoryite wih tiny grains of (Mn, Fe)S, MnFe spinel, sodic sylvite, Na- and Si-rich apatite, spurrite, and intergrowths of sylvite, fluorite and a phase similar to nyerereite. The matrix also contains an unidentified complex carbonate? of Ca, Ba, Sr, K and Na. All phases represent solid solutions (attributed to the high-temperature crystallization of the chemically complex dominantly carbonate liquid) that are very rare or not previously reported.