GEOCHEMISTRY OF CENOZOIC ALKALI BASALTIC LAVAS FROM SHANDONG PROVINCE, EASTERN CHINA

	GEOCHEMISTRY OF CENOZOIC ALKALI BASALTIC LAVAS FROM SHANDONG PROVINCE, EASTERN CHINA
	DOSTAL, J ; ZHI, XC ; MUEHLENBACHS, K ; DUPUY, C ; ZHAI, MZ
刊名	GEOCHEMICAL JOURNAL
	1991
卷号	25 期号:1 页码:1-16
ISSN号	0016-7002
文献子类	Article
英文摘要	Cenozoic alkali basaltic rocks from the central and eastern parts of Shandong province, eastern China include alkali basalts, basanites and olivine nephelinites, some of which contain spinel peridotite xenoliths and megacrysts predominantly of clinopyroxene and anorthoclase. The abundances and ratios of incompatible elements in the basalts are similar to those of many continental and oceanic island alkali basalts. The magmas were derived from metasomatised garnet-clinopyroxene-bearing peridotites by variable but small degrees of melting. A metasomatism which produced an enrichment of strongly incompatible elements was superimposed on a depleted source shortly prior to a melting event. The basaltic rocks from the central and eastern regions have distinct major and trace element characteristics and Sr-Nd-Pb isotopic compositions. The Eastern Shandong lavas have higher abundances of Na, P and incompatible trace elements but are lower in Mg and compatible trace elements than those from the central part. The source of the Eastern Shandong basalts was relatively homogeneous in Sr and Pb isotopic compositions and was metasomatically enriched, at least in part, by carbonate-rich fluids. Phlogopite and probably apatite remained in the residue after the extraction of Eastern Shandong nephelinites. The basaltic rocks of Central Shandong were generated from a heterogeneous multicomponent source. Delta-O-18 values negate a significant role of upper crustal contamination in the genesis of the Shandong basalts. The compositional similarities between the Shandong continental alkali basaltic lavas and continental and oceanic island alkali basalts suggest that their mantle parents were metasomatically enriched by fluids derived from the same source - rising asthenospheric plumes.
WOS关键词	SUBCONTINENTAL MANTLE ; HANNUOBA BASALTS ; VOLCANIC-ROCKS ; ORIGIN ; PETROGENESIS ; OLIVINE ; EARTH ; HETEROGENEITY ; CONSTRAINTS ; EVOLUTION
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	GEOCHEMICAL SOC JAPAN
WOS记录号	WOS:A1991GA56400001
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/71528]
专题	中国科学院地质与地球物理研究所
通讯作者	DOSTAL, J
作者单位	1.UNIV SCI & TECHNOL CHINA, DEPT EARTH & SPACE SCI, HEFEI 230026, PEOPLES R CHINA 2.UNIV ALBERTA, DEPT GEOL, EDMONTON T6G 2E3, ALBERTA, CANADA 3.UNIV MONTPELLIER 2, CTR GEOL & GEOPHYS, F-34060 MONTPELLIER, FRANCE 4.CHINESE ACAD SCI, INST GEOL, BEIJING, PEOPLES R CHINA
推荐引用方式 GB/T 7714	DOSTAL, J,ZHI, XC,MUEHLENBACHS, K,et al. GEOCHEMISTRY OF CENOZOIC ALKALI BASALTIC LAVAS FROM SHANDONG PROVINCE, EASTERN CHINA[J]. GEOCHEMICAL JOURNAL,1991,25(1):1-16.
APA	DOSTAL, J,ZHI, XC,MUEHLENBACHS, K,DUPUY, C,&ZHAI, MZ.(1991).GEOCHEMISTRY OF CENOZOIC ALKALI BASALTIC LAVAS FROM SHANDONG PROVINCE, EASTERN CHINA.GEOCHEMICAL JOURNAL,25(1),1-16.
MLA	DOSTAL, J,et al."GEOCHEMISTRY OF CENOZOIC ALKALI BASALTIC LAVAS FROM SHANDONG PROVINCE, EASTERN CHINA".GEOCHEMICAL JOURNAL 25.1(1991):1-16.