STRUCTURAL CONTROL TO THE GOLD DEPOSITS IN TULASU AREA, WEST TIANSHAN

The Late Paleozoic epitherrnal gold deposits have been discovered in Tulasu area in west Tianshan mountains recently and were devided into two types:adularia-sericite type and silicified rock type,both are the active products of volcanic geotherml-fluid system and were controlled by three-grade structuresobviously in order:the Tulasu basin trending nearly E-W control, the regional metallogenic zone; the nearly NS structural belt crosscutting the nearly E-W one control the gold ore field; the volcanic apparatus control the distribution of gold-ore bodies. And the host structures of ore bodies are low-grade faults.