摘要
鲁中地区分布着100多个碳酸岩体,微量元素含量及稀土配分等均与世界典型碳酸岩相近。而碳酸岩的碳氧及斑晶磷灰石的锶、钛同位素组成与典型地幔物质有差异,与富集地幔颇为近似,从而证实在山东地区陆壳下存在富集地幔源区。
There are over one hundred carbonatite bodies of Yenshanian age in the centTal part of Shandong Province. The contents of trace elements and REE distribution patterl1s of the rocks are similar to those of typical carbonatites in other parts of the world. Some differences are found in O and C isotopic composition between phenocryst apatite and typical mantle materials, but the apatite is similar to that from the enriched mantle. Therefore, the authors suggest that there exists an enriched mantle source region beneath the continental crust of Shandong Province.
出处
《矿物学报》
CAS
CSCD
北大核心
1997年第1期82-85,共4页
Acta Mineralogica Sinica
关键词
碳酸岩
锶
同位素
碳灰石同位素
地球化学
carbonatite
phenocryst apatite
Sr-Nd isotope
oxygen and carbon isotope
enriched mantle
central Shandong