The Chukchudu graben and some problems of the Mesozoic geology and copper mineralization of the Udokan Ridge (Transbaikalia)

This paper presents new data on the geology, age, and structure of Mesozoic magmatites and related ore occurrences of copper and molybdenum in the cen tral part of the Udokan Ridge. It has been established that Mesozoic magmatites compose the Udokan polychr onous area of magmatism, which began to form in the Precambrian. Its format ion is associated with the existence of the long-lived center of endogenic activity beneath the Udokan Ridge. It is suggested that the Udokan basic magmas are rich in copper ores, which may be the result of enrichment of mantle substratum with copper at the de pths of magma generation.