摘要
广东信宜-罗定地区含锡花岗岩类呈复式小岩体产出,由花岗斑岩和花岗岩组成.岩石的稀土元素总量高(w(ΣREE)为236.75×10-6～383.28×10-6);从第一阶段花岗斑岩到第二阶段花岗岩的稀土总量降低;轻重稀土的比值ΣCe/ΣY(0.77～1.38)较低;具有弱的Ce负异常和强烈Eu亏损(δEu=0.015～0.119);稀土元素配分模式呈海鸥型.岩石属于大陆板内张性构造环境下高侵位形成的壳源重熔型花岗岩类.
Tin-bearing granites in Xinyi-Luoding area, Guangdong occur in small composite bodies, which consists of granitic porphyries and granites. The rocks are characterized by high total contents of rare earth elements （236.75 × 10^-6-383.28× 10^-6） ,Low ratio of ΣCe/ΣY （0. 77-1. 38） ,weak Ce negative anomaly and strong Eu depletion δEu= 0. 015- 0. 119）. The chondrite-normalized patterns of rare earth elements are in seagull forms. The rocks are crustal remelting,shall level granites formed in a within-plate tensional tectonic environment.
出处
《矿产与地质》
2005年第5期465-468,共4页
Mineral Resources and Geology
基金
广东省科技计划重点项目(2004A30308002)
