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对云南哀牢山带蛇绿岩底部及顶部两类放射虫硅质岩的地质学、微体古生物学、同位素及稀土元素地球化学研究表明：蛇绿岩底部为浊积岩建造，其放射虫种属相当于晚泥盆世；硅质岩δ~３０Ｓｉ为－０．４‰～０．５‰（平均 ０．０３‰），δＣｅ为 ０．７７～０．９７（平均 ０．８５）， Ｌａ_Ｎ／Ｙｂ_Ｎ为 ０.７７～１．０６（平均０．９６），均指示其形成于深海环境；蛇绿岩顶部的放射虫硅质岩与蛇绿岩套中玄武岩呈整合接触，属于哀牢山带蛇绿岩套组成单元，该放射虫硅质岩为含泥硅质建造，其放射虫种属相当于早石炭世，硅质岩δ~３０Ｓｉ为０．２‰～１．３‰（平均０．７‰）， δＣｅ为０．８８～０．９２（平均０．９０）， Ｌａ_Ｎ／Ｙｂ_Ｎ为０．７７～１．４５（平均１．２２），均指示其形成于半深海环境，表明当时哀牢山是一个小洋盆．
The geology, microscopic paleontology, isotope and REE geochemistry of two types of radiolammonium chert at the bottom and top of the ophiolite in the Ailaoshan belt, Yunnan Province indicate that the bottom of the ophiolite is turbidite and its radiolarian The δ ~ 30Si is -0.4 ‰ ~ 0.5 ‰ (average 0.03 ‰), δCe is 0.77 ~ 0.97 (average 0.85) La_N / Yb_N ranged from 0.77 to 1.06 (average 0.96), indicating that they were formed in the deep sea environment. The radiolarian chert on the ophiolite was integrated with the basalt in the ophiolite suite, The ophiolite suite is composed of siliceous siliceous rocks. The radiolarian species is equivalent to the Early Carboniferous, and the δ ~ 30Si of the chert is 0.2 ‰ ~ 1.3 ‰ ( Average 0.7 ‰), δCe 0.88 ~ 0.92 (average 0.90), La_N / Yb_N 0.77 ~ 1.45 (average 1.22), indicating that they are formed in the semi-deep sea environment, That time was sad Hill is a small ocean basin.