Magma Mixing, Recharge and Eruption Histories Recorded in Plagioclase Phenocrysts from El Chichón Volcano, Mexico
Magma Mixing, Recharge and Eruption Histories Recorded in Plagioclase Phenocrysts from El Chichón Volcano, Mexico
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DOI：
10.1093/petrology/41.9.1397
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发表时间：
2000-09
影响因子：
3.9
通讯作者：
F. Tepley;J. Davidson;R. Tilling;J. G. Arth
中科院分区：
文献类型：
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作者：
F. Tepley;J. Davidson;R. Tilling;J. G. Arth
在El Chichon岩浆的200 ky历史中，Sr/Sr比值和重合系统的一致的核-缘降低。从1982年和1982年前（>200 ka）El Chichon火山喷发的样品中报告了不同尺寸（>1 cm至2 mm）的斜长石斑晶中Sr浓度的增加。岩心中Sr/Sr比值最大值> 0.7054，明显高于全岩同位素比值（> 0.7040 ~ 0.7045
operative throughout the 200 ky history of the El Chichon magma Consistent core-to-rim decreases of Sr/Sr ratios and coincident system. increases in Sr concentrations in plagioclase phenocrysts of varying size (>1 cm to 2 mm) are reported from samples of the 1982 and pre-1982 (>200 ka) eruptions of El Chichon Volcano. Maximum Sr/Sr ratios of >0·7054, significantly higher than the wholerock isotopic ratios (>0·7040–0·7045), are found in the cores