Jiulong giant crystal calcite deposit is the largest calcite deposit in Yunnan province.Systemat-ic field investigation has been made and basic geological characteristics and ore-control factors analyzed.Calcite ore bodies occur in layered,layeroid body or big vein within limestone of Lower Permian Maokou formation(P1m)showing clear stratibound characteristics.The calcite deposit is controlled by both li-thology of the wall rock and fault with obvious hydrothermal filling feature.It is a stratibound hydrother-mal deposit.Intra-continental tectonic transformation related to Cenozoic Indo-Eurasian plate collision progeny may be the key ore-forming mechanism of the deposit.
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