Evidence from isotopic dating suggests that the greenstone belts vary considerably in age . 來自同位素年齡鑒定的證據(jù)指出,綠巖帶在年齡上彼此變化相當(dāng)大。
There are two sets of elements geochemical anomalies : one extends nw , and is controlled by regional faults ; the other extends ne , and intersects with the former taking on " v " form , and is important to mineral exploration . 3 . almost all au deposits are situated in greenstone belt of tectonic sutures 元素地球化學(xué)場表現(xiàn)出兩個(gè)方向的特點(diǎn):一組異常呈北西向展布,受區(qū)域構(gòu)造控制;另一組異常呈北東向展布,與北西向異常交叉呈“ v ”字形,具有重要找礦意義。
The mineralization theories related to the continued resources exploration of the crisis mines include : the model of golden deposits in greenstone belts ; the superimposed model of epithermal deposits and porphyry deposits ; the prospecting model of superfine dip gold deposit in deep ; prospecting model of copper and nickel sulfides in deep ; the associated model of lead , zinc and gold 與危機(jī)礦山接替資源找礦勘查有關(guān)的成礦理論包括:綠巖帶金礦新模式,淺成熱液和斑巖銅礦的套疊模式,微細(xì)浸染型金礦深部找礦模式,銅鎳硫化物深部找礦模式,金和鉛鋅礦共伴生模式等。