九顶山铜钼多金属矿床控矿因素及找矿标志

九顶山铜钼多金属矿床受地层岩性、岩体产状、岩石化学、岩体蚀变分带、接触带构造等控制。喜马拉雅期中期,富含钼、铜等金属及硫元素的的岩浆流体上升侵位,富成矿元素的岩浆热液,聚集于斑岩体顶部及围岩接触带,发生广泛蚀变交代作用,斑岩体内→外接触带出现浸染状辉钼矿-黄铜矿-黄铁矿化→细脉-浸染状黄铜矿-辉钼矿化。矿区北东接触带,斑岩体内部至围岩接触带蚀变发育之处,矿区褶皱核部、两翼层间滑脱带、岩体内外接触带构造等均可作为重要的找矿标志。

Ore-controllingSFactors and Prospecting Indicators of Jiudingshan Cu-Mo PolymetallicSdeposit in western Yunnan, China

The formation of the Jiudingshan porphyry molybdenum-copper deposit is controlled by lithology, occurrence, chemical feature, alteration, metamorphic, structure and so on. In the middle of Himalayan, the magmatism, with the rich of Mo, Cu and S, intruded into the earlier granite and lower Ordovician strata. The ore-forming magmatism gathered together in the top of porphyry and country rock and occurred strong metasomatic alteration and corresponding Mineralization,impregnated mineralize of molybdenite-chalcopyrite-pyrite and stringer-disseminated chalcopyrite-molybdenite from granite porphyry to the contact zones of hornstone-skarn. The results show that the northeastern contact zone of mine, alteration from porphyry to country rock contact zone, the core of fold, interlayer spondylolisthesis in fold"s limbs, and the inside and outside contact belt of rock body are the main enrichment belt.