稀土元素在韧性剪切带体积亏损研究中的应用——以胶南造山带构造岩为例  

Application of REE Anomaly in Volume Deficiency of a Ductile Shear Zone ——An Example from the Ductile Shear Zone on the Northern Margin of the Jiaonan Orogenic Belt

作　　者：周建波[1] 胡克[1] 洪景鹏 

机构地区：[1]长春科技大学地球科学学院,130061

出　　处：《地质论评》1999年第3期241-246,共6页Geological Review

基　　金：国家自然科学基金(编号49472106)

摘　　要：稀土元素在韧性剪切带中发生有规律的成分变异。随着变形程度的增强,单个稀土元素(REE)、轻稀土(LREE)、重稀土(HREE)、稀土元素的总量(ΣEREE)均明显增加,而稀土配分模式不变。通过花岗质构造岩变形前后的等比分析,稀土元素的成分变异主要是由于较大的体积亏损而引起,并根据成分变异与体积亏损之间的函数关系,进一步确定了构造岩变形前后的体积亏损率。REE change regularly in the ductile shear zone. Along with intensifying deformation, the contents of all the rare earth elements and the total contents of the LREE, HREE and REE increase, but their REE patterns remain unchanged. Isorat analysis of granitic tectonic rocks before and after deformation shows that the REE compositional variation mainly from REE relative enrichment caused by large volume deficiency. According to the functional relation between the compositional variation and the volume deficiency, the volume deficiency (14. 5%) of mylonite is obtained, and the volume deficiency factor of ultramylonite reaches 20%.

关 键 词：稀土元素 成分变异 体积亏损率 剪切带 胶南造山带 

分 类 号：P542.2[天文地球—构造地质学] P595[天文地球—地质学]