摘要
CARBONATES in lamprophyres have various occurrences. The source of CO<sub>2</sub> in lamprophyres provides animportant clue for us to understand the relationship between lamprophyres and gold mineralization.Demeny et al.determined the C and O isotopic composition of various carbonates from Mesozoic lamprophyres in Transdanubian Range of Hungary, and suggested that the carbonates with different occurrences were different in origin. That is to say, the CO<sub>2</sub> in lamprophyres has various sources. TheLaowangzhai gold deposits, Yunnan Province, China, is a typical orefield where lamprophyres are temporally and spatially related to gold mineralization. The CO<sub>2</sub> contents of relatively fresh lampropyres from theorefield （the range of content is 5.10%-9.56%, averaging 7.45% ） are obviously higher than that ofprimary lamprophyres （about 0.5%）. Huang et al.considered that the CO<sub>2</sub> in relatively fresh lam-
