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胶北晚中生代煌斑岩的岩石地球化学特征及其成因研究
Alternative TitleGeochemical characteristics and petrogenetic investigation of the Late Mesozoic lamprophyres of Jiaobei, Shandong province
刘燊; 胡瑞忠; 赵军红; 冯彩霞; 钟宏; 曹建劲; 史丹妮
2005
Source Publication岩石学报 (IF:1.148[JCR-2016],1.468[5-Year])
Volume21Issue:3Pages:947-958
metadata_24其它
Abstract胶北煌斑岩分别采自龙口、烟台和威海地区,包括拉辉煌斑岩、斜闪正煌岩和角闪煌斑岩,煌斑岩K—Ar全岩年龄变化于89.3~169.5Ma,为晚中生代岩浆活动的产物。在岩石化学组成上,SiO2=42.02%~54.95%,以钙碱性系列为主.岩石以富集大离子亲石元素(LILE)(Ba,U,K,Th)和LREE,亏损高场强元素(HFSE)(Nb,Ta和Ti)为特征,Mg^#=33.9~53.9,Eu/Eu^*=0.71~0.89,^87Sr/^86Sr初始比值0.707642~0.709791,εNd(t)为-17.6~-10.4,^206Pb/^204Pb=37.588~38.431,^207Pb/^204Pb=15.423~15.531,^206Pb/^204Pb=17.204~18.179。表明煌斑岩源自俯冲陆壳(扬子下地壳)在地幔源区发生交代作用时形成的富集型地幔的部分熔融体.考虑到煌斑岩具有大陆边缘弧玄武岩的特征,我们认为煌斑岩在成因上同样与古大洋板块的俯冲作用有关,为碰撞后弧岩浆作用形成的脉岩。
Keyword煌斑岩
Subject Area中国典型特殊区带大规模成矿作用及其动力学
Funding Organization中国科学院知识创新工程重要方向项目(KZCX3-SW-125)和领域前沿项目(CJ0403,CJ0406)资助.
Indexed ByCSCD
Language中文
CSCD IDCSCD:1997912
Citation statistics
Cited Times:41[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/352002/280
Collection矿床地球化学国家重点实验室_矿床地球化学国家重点实验室_期刊论文
矿床地球化学国家重点实验室
Corresponding Author胡瑞忠
Recommended Citation
GB/T 7714
刘燊,胡瑞忠,赵军红,等. 胶北晚中生代煌斑岩的岩石地球化学特征及其成因研究[J]. 岩石学报,2005,21(3):947-958.
APA 刘燊.,胡瑞忠.,赵军红.,冯彩霞.,钟宏.,...&史丹妮.(2005).胶北晚中生代煌斑岩的岩石地球化学特征及其成因研究.岩石学报,21(3),947-958.
MLA 刘燊,et al."胶北晚中生代煌斑岩的岩石地球化学特征及其成因研究".岩石学报 21.3(2005):947-958.
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