Abstract:

In order to serve the geochemical exploration for deep ore bodies, the authors put forward a new law of anomalies related to the hydrothermal nonferrous metal mineralization, multidimensional anomaly system, on the basis of studies on over twenty deposits. The multidimensional anomaly system refers to the anomalies which are orderly coexisting spatially, of different formation mechanisms and indicative of further multilevel geochemical anomalies observed in specific geological bodies of geological periods. The new theory will play an important role in prospecting deep-seated nonferrous metal deposits related to hydrothermal activities, such as porphyry, skarn, hydrothermal and sedimentary-reformed type deposits. We take the Matou porphyry molybdenum copper mine in Anhui Province as an example to discuss this theory. The result shows that there are negative anomalies system dominated by Na₂O, mineralizer elements anomalies system dominated by S, equilibrium system among mineralizer elements, Fe and ore-forming elements, as well as ore-forming and accompanying elements anomalies system in Matou porphyry molybdenum copper mine. The ore-forming indicative significance of these systems goes forward one by one. The study verifies the existence of the multidimensional anomaly system and illuminates the application of this system to the prospecting of deep-seated ore bodies.

Key words: hydrothermal deposit, nonferrous metal deposit, anomaly related to mineralization, multidimensional anomaly system, Matou porphyry molybdenum copper mine