THE CONODONT AGES OF THE DINGJIAZHAI AND WONIUSI FORMATIONS IN THE BAOSHAN AREA, WESTERN YUNNAN
THE CONODONT AGES OF THE DINGJIAZHAI AND WONIUSI FORMATIONS IN THE BAOSHAN AREA, WESTERN YUNNAN
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发表时间：
2004
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通讯作者：
Wang Wei
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作者：
Wang Wei
本文报道了保山地区丁家寨组和卧牛寺组牙形刺动物群，其中包括两个新种：Rabeignathus ritterianus sp.nov.和Rabeignathus yunnanensis sp.nov.和其他化石种，明确表明丁家寨组上部的时代为Sakmarian晚期至Artinskian早期，卧牛寺组的时代为Artinskian晚期，可能为Kungurian早期，即早二叠世。这些牙形石动物群应属暖水相而非冷水相。丁家寨组和卧牛寺组沉积于前冈瓦纳大陆。从卧牛寺组火山喷发玄武岩中可以看出，保山地块从冈瓦纳古陆中移出的时代为阿廷斯基晚期。
Conodont faunas from the Dingjiazhai and Woniusi Formations in the Baoshan area, including two new species: Rabeignathus ritterianus sp.nov. and Rabeignathus yunnanensis sp.nov., and other species, clearly indicate that the age of the upper part of the Dingjiazhai Formation is the latest Sakmarian to early Artinskian, and the age of the Woniusi Formation is late Artinskian , possibly, to early Kungurian, Early Permian. These conodont faunas should belong to warm water facies rather than cool water facies. The Dingjiazhai and Woniusi formations were deposited on the Peri-Gondwana. The displacement age of the Baoshan block from the Peri-Gondwana was in late Artinskian indicated by the eruptive basalts of the Woniusi Formation.