Abstract:

Calcite is a dominant gangue mineral in the eastern ore belt of Baiyangping poly-metallic metallogenic province. Geochemical characteristics of rare earth element (REE) of calcite from different ore bodies reveal that there are two types of REE distribution patterns: light rare earth element (LREE)-enriched and flat REE. The former represents that the REE behavior of calcite is that of inherited from pre-hydrothermal ore-forming hydrothermal features and the LREE was not apparently carried out during the mineralization process. The latter indicates that LREE was apparently brought out during the mineralization process; the REE content, relevant parameters and REE distribution patterns of calcite from different types of ore bodies change significantly, but they show continuous change tendency; combined with other isotope data and geological background of the mine, it is considered that ore-forming fluids were mainly hot brines and some mantle fluid participated in the ore forming process; The ore-forming conditions change from the reducing to oxidizing ones during the metallogenic process.

Key words: rare earth elements（REE）, geochemistry, calcite, the eastern ore belt of Baiyangping poly-metallic metallogenic province, northwestern Yunnan