摘要
对胶东崮庄岩体黑云母闪长岩进行了岩石学、岩石地球化学和年代学研究。研究表明:崮庄岩体黑云母闪长岩为钙碱性系列岩石,岩石富集大离子亲石元素(如K,Ba,Rb)、LREE和活泼的不相容元素(如Th,U),相对亏损高场强元素(如Nb,Ta,Ti,P),崮庄闪长岩属壳幔混合成因,即由交代地幔部分熔融形成的基性岩浆与地壳物质熔融形成的酸性岩浆混合形成的。构造环境判别显示崮庄闪长岩属火山弧花岗岩,暗示伟德山序列花岗岩与古太平洋板块向欧亚板块俯冲密切相关。崮庄闪长岩LA-ICP-MS锆石U-Pb年龄值为(111.7±0.6)Ma,属燕山期早白垩世。
The petrology,geochemistry and geochronology of Guzhuang diorite have been studied in this paper.It is showed that diorite is a series of calc alkaline rocks,which are enriched in LILE(such as K,Ba,Rb),LREE and more mobile incompatible elements(such as Th,U),relatively depleting in HFSE(such as Nb,Ta,Ti,P).Guzhuang diorite belongs to mixed formation of crust and mantle.It is formed by the mixture of basic magma formed by partial melting of metasomatic mantle and the mixture of acid magma formed by the melting of crustal materials.Tectonic discrimination shows that Guzhuang diorite belongs to volcanic arc granite.It is suggested Weideshan granite series and Paleo Pacific plate to the Eurasian plate is closely related.LA ICP MS zircon U[CD*2]Pb dating is(111.7±0.6)Ma,which belongs to early Cretaceous.in Yanshanian period.
作者
李杰
李世勇
宋英昕
姜梦瑶
毕明光
王珊珊
蒋雷
孙亮亮
LI Jie;LI Shiyong;SONG Yingxin;JIANG Mengyao;BI Mingguang;WANG Shanshan;JIANG Lei;SUN Liangliang(School of Resources, Hebei GEO University, Hebei Shijiazhuang 050031, China;Deep Sea Research Center of Oceanography Institute of Chinese Academy of Sciences, Shandong Qingdao 266071, China;Shandong Geophysical and Geochemical Exploration Institute, Shandong Jinan 250013, China;Shandong Institute of Geological Sciences, Shandong Jinan 250013, China;No.6 Exploration Institute of Geology and Mineral Resources, Shandong Weihai 264209, China)
出处
《山东国土资源》
2018年第4期35-42,共8页
Shandong Land and Resources
基金
河北省高等学校科学技术研究指导项目(Z2017110)
山东省泰山学者建设工程专项经费(ts201511076)
山东省重点研发计划项目(2017CXGC1604)联合资助
