RB-SR SYSTEMATICS AND CRUSTAL CONTAMINATION MODELS FOR CALC-ALKALINE IGNEOUS ROCKS

被引：76
作者：
BRIQUEU, L
LANCELOT, JR
机构：
[1] Laboratoire de Géochimie Isotopique, Centre Géologique et Géophysique, Université des Sciences et Techniques du Languedoc, 34060 Montpellier Cedex, Place E. Bataillon
来源：
EARTH AND PLANETARY SCIENCE LETTERS | 1979年 / 43卷 / 03期
关键词：
D O I：
10.1016/0012-821X(79)90093-1
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
New strontium isotopic data of calc-alkaline Pliocene-to-Quaternary lavas (southern Peru) confirm their anomalous isotopic composition compared to those of calc-alkaline rocks from active margins where continental crust is not involved. Gradual enrichment of radiogenic Sr occurs during fractional crystallization of calc-alkaline magma. The variation of the isotopic composition of these lavas as well as 87Sr/86Sr versus 1/(86Sr) diagrams form the basis for a model involving processes of fractional crystallization combined with mixing and addition of radiogenic Sr that originated in continental crust and was transported by a fluid phase. © 1979.
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页码：385 / 396
页数：12
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