GYIG OpenIR  > 矿床地球化学国家重点实验室  > 期刊论文
辽西建昌碱性粗面岩的年代学及岩石成因研究
冯光英; 刘燊; 钟宏; 冯彩霞; 齐有强; 杨毓红; 杨朝贵
2011
Source Publication矿物学报
Volume31Issue:3Pages:380-390
Other Abstract义县组火山岩在辽西分布广泛,研究区碱性粗面岩位于建昌地区义县组火山岩的顶部,详细的年代学及地球化学研究表明,锆石U-Pb年龄为(120.3±1.5)Ma,具有较高的SiO2和碱含量,w(SiO2)=63.52%~65.94%,w(Na2O+K2O)=9.63%~10.15%,w(Na2O)/w(K2O)为0.96~1.08,属于高钾碱性岩系列,同时具有较低的w(MgO)(0.75%~1.05%),稀土配分模式为轻稀土富集,重稀土亏损的右倾型模式((La/Yb)N=8.96~12.02),较弱的正Eu异常(δEu=1.07~1.16),相容元素Cr(1.46×10-6~4.15×10-6)、Co(19.8×10-6~45.9×10-6)和Ni(0.100×10-6~1.55×10-6)含量低。微量元素蛛网图显示明显的Ba和Pb正异常,以及Sr、Ti和Y负异常,此外,Zr和Hf显示一定的正异常。认为碱性岩形成于拉张的构造环境,且来源深度较大,是壳幔相互作用的结果,研究区火山岩是经过强烈橄榄石、斜方辉石和单斜辉石结晶分异的富集地幔岩浆上升底侵至下地壳,并经历同化混染和部分熔融,然后沿着深大断裂喷发至地表。
Keyword辽西建昌 义县组 碱性粗面岩 岩石成因
Subject Area矿床地球化学
Indexed ByCSCD
Language中文
CSCD IDCSCD:4327423
Citation statistics
Cited Times:6[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/352002/7073
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
Recommended Citation
GB/T 7714
冯光英,刘燊,钟宏,等. 辽西建昌碱性粗面岩的年代学及岩石成因研究[J]. 矿物学报,2011,31(3):380-390.
APA 冯光英.,刘燊.,钟宏.,冯彩霞.,齐有强.,...&杨朝贵.(2011).辽西建昌碱性粗面岩的年代学及岩石成因研究.矿物学报,31(3),380-390.
MLA 冯光英,et al."辽西建昌碱性粗面岩的年代学及岩石成因研究".矿物学报 31.3(2011):380-390.
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