COMPLEX MODEL OF COPPER METALLOGENY IN MIDDLE-LOWER YANGTZE VALLEY AND ITS SIGNIFICANCE FOR ORE EXPLORATION

<正> The middle-lower Yangtze Valley is a major metallogenic province of copper deposits inChina. The major types of copper deposits in this area are: the sedimentary-reformationaltype, skarn type, porphyry type and volcanic type ore deposits. The complex model of coppermetallogeny of the area is a dialectical synthesis in space, time and composition of severaltypes of ore deposits. It is convenient for us in exploring and evaluating one type of oredeposit to consider the possibility of the presence of other types at the same time, andwhen one kind of ore is discovered, one must consider to search for another. Thus, the newapproach to exploration may be developed and the potential of the orefield be expanded.