毕节煤矿区晚二叠世煤层稀土元素的物质来源

Substance Sources of Rare-Easth Elements in Late Permian Coal Seams on Coal Mines in Bijie

对取自毕节地区晚二叠世11个可采煤层的13个样品的稀土元素(REE)的物质来源进行分析。发现:海洋来源对稀土元素的富集作用极其微弱;来自植物成因的物质来源小于1%;煤样中δEu负异常,而陆源岩具有Eu负异常的特点。结合晚二叠世多期喷发的峨眉山玄武岩,因此认为稀土元素的物质来源主要受陆源影响和控制。

Substance sources of rare -earth elements （REE） for studies in 13 samples collected from eleven productive coal seams of late Permian detect that the source from margin plays a extremely low role in concentration of the rare - earth elements; the sources from foliage genesis is less than 1% ; and characteristics thatδEu negative anomaly expose in the coal samples and Eu negative anomaly expose in the terrigenous rocks. In combination with Emeishan basalt erupted in late Permian epoch, it is believed that substances origin of the rare -earth elements dominantly by control of terrigenous impaction therefore.