ABSTRACT
The Paleo-Proterozoic (1900-1800Ma) is the first of several important transitional periods in the earth’s evolutionary history in the North China Craton. During this period, the first overlapped assemblages of volcanic-sedimentary rocks were formed in a marginal continental rift, known as the Jiliaojiao Proterozoic Rift. Among varied types of deposits, Magnesite and boron deposits of the Liaodong Peninsula are unique in both China and abroad. Magnesite and talc deposits are also very important in this Paleo-Proterozoic metallogenic belt. The proven reserve of magnesite deposits in the area ranks the first in the world. All the Pb-Zn deposits of industrial significance in the area occur in some secondary basins associated with syn-depositional faults in the marginal continental rift. The gold deposits in the belt are predominantly hosted by metamorphic detrital rocks and carbonates and are mostly controlled by ductile-brittle faults while the gold ore bodies are controlled by inter-formational and some crosscutting faults.
