Abstract
Barite-fluorite metallogenic belt of southeast Sichuan is one of the important metallogenic belt in China. The initial ratio of 87Sr/86Sr is the good tracer in study of diagenetic mineralization process and sources of ore-forming materials. The 87Sr/86Sr ratio of fluorite and barite from barite-fluorite deposits in southeast Sichuan is 0.708800~0.712999, and it similar to The 87Sr/86Sr ratio of Cambrian carbonate rocks and ordovician limestone, but expect the lower Cambrian Niutitang group stratum, the Ba content of other layers are generally low, Therefore, the Ca source of ore-forming materials should be multisource, mainly from Cambrian-Ordovician carbonate strata , and the main Ba source of layer should be the lower Cambrian Niutitang group stratum.
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