摘要
新疆谢米斯台东段早石炭世A型花岗岩,富硅碱,A/CNK介于0.88～0.98之间,σ在2.44～5.90之间。相对富集大离子亲石元素、轻稀土元素,亏损Ba、Sr、Nb、P、Ti,稀土元素分布曲线呈明显的"海鸥"型。由早侵入次到晚侵入次,有向酸碱性增强方向演化,显示A型花岗岩特征,具造山后或后造山特征,形成于碰撞造山后的伸展构造背景。
The intrusive rock located in the eastern part of Xiemisitai,Xingjiang,was identified as A-type granites.The chemical compositions of the intrusions are characterized by high-Si,A/CNK 0.88 to 0.98 range and the Rittmann Index σ in between 2.44 to 5.90.The REE pattern is characterized by rightward declined ＂Seagull＂ shaped curves,rich in LREE and strong negative Eu anomalies.
出处
《甘肃地质》
2011年第2期29-34,共6页
Gansu Geology
基金
新疆和布克赛尔蒙古自治县谢米斯台东段一带1:5万区域地质矿产调查(项目编号:QD200610)
新疆维吾尔自治区财政预算内地质勘查专项资金项目(QD200610)
关键词
谢米斯台东段
早石炭世
A型花岗岩
Xingjian
the eastern segment of Xiemisitai
Early Carboniferous
A-type granites
