CE-ANOMALOUS LAVAS FROM RABAUL CALDERA, PAPUA-NEW-GUINEA

被引：32

作者：

HEMING, RF ^{[1
]}

RANKIN, PC ^{[1
]}

机构：

[1] DSIR,BUR SOIL,LOWER HUTT,NEW ZEALAND

来源：

GEOCHIMICA ET COSMOCHIMICA ACTA | 1979年 / 43卷 / 08期

关键词：

D O I：

10.1016/0016-7037(79)90125-X

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：

REE abundances for a suite of Rabaul caldera lavas ranging from basalt to dacite are reported. Three of the lavas contain negative Ce anomalies. These 'anomalous' lavas are older and have a geochemistry different from the younger lavas which form the main Rabaul caldera. The consistent geochemical differences between the two groups of lavas suggest that the Ce anomaly is inherited from the source material from which the magmas were derived and is not due to differences in crystallization or fractionation paths. Ocean floor lavas containing zeolite assemblages have been shown to possess a Ce anomaly and it is concluded that those lavas having a Ce anomaly were derived from lithosphere which had been depleted in Ce during weathering and hydrothermal processes. © 1979.

引用

页码：1351 / 1355

页数：5

共 29 条

[1] PARTITION OF SR, BA, CA, Y, EU2+, EU3+, AND OTHER REE BETWEEN PLAGIOCLASE FELDSPAR AND MAGMATIC LIQUID - EXPERIMENTAL STUDY [J].