Geochemical Characteristics of Diyanmiao Ophiolite in Xi U jimqin Banner,Inner Mongolia
Newly discovered Diyanmiao ophiolite occurs in Xinganling-Mongolian Orogenic Belt (XMOB) in the central sector of Inner Mongolia.It is mainly composed of augite peridotite, beded-massive gabbro, anorthosite, pillow basalt, keratophyre, and baschtauite.Geochemical characteristics of Diyanmiao basalt are similar to island arc tholeiite (IAT), with low Ti (TiO2=0.62% ~ 0.78%), high Mg (MgO =5.20% ~ 11.30%), and the Chondrite-normalized REE patterns of Diyanmiao basalt are of characteristics of LREE depletion, similar to N-MORB, while the spider diagram shows the enrichment of the Large Iron Lithosphile Elements and depletion of High Field Strength Elements-the unique feature of the arc volcanic rocks.According to the existence of IAT, it is concluded that the Diyanmiao ophiolite was likely formed in the island arc and its related setting.
Diyanmiao Ophiolite Geochemistry IAT Xi U jimqin Banner Inner Mongolia
LI Yingjie WANG Jinfang DONG Peipei
Shijiazhuang University of Economics,P.R.China;School of Earth Sciences and Resours,China University Shijiazhuang University of Economics,P.R.China School of Earth Sciences and Resours,China University of Geosciences,Beijing,P.R.China
国际会议
第十八届凯洛林国际地质学术研讨会(The 18th Kerulien International Conference on Geological)
石家庄
英文
11-16
2013-09-20（万方平台首次上网日期，不代表论文的发表时间）