Abstract
The Truong son fold belt, located in the Truong son Range and in central Vietnam and eastern Laos, an elongate northwest trending belt,is dominated by a system of strikeslip faults, which forms part of the Indochina block. Rocks in the belt are metamorphosed up to the amphibolite facies grade, predominantly Early to Mid Paleozoic.The tectonic boundaries of the Truong son fold belt, Song Ma suture zone, Dien BienPhu Fault, Khorat Basin and Tamky-Phuoc Son fault lies to north, west and south of the belt respectively(Fig,1). The Truong son tectonic magmatic belt,the same position with fold belt, composed of volcanic rock and granite, which was formed in Caledonian, Variscan and Indosinian periods. Due to the particular geological background, the Truongson metallogenic belt has experienced complex diagenesis and mineralization, and rich mineral resources were formed. There are more than 70 gold, copper, iron, tin, lead and zinc deposits, including some large to super-large –scale deposits, such as Sepon copper-gold deposit, Phu Kham gold-copper deposit in Laos, and Thach Khe iron deposit in Vietnam.
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