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一、问题的提出我们在青海南部高寒山区进行区域化探异常追踪评价过程中,发现不少化探异常与冰川在空间位置上都有着密切的关系.有的异常(特别是与斑岩铜矿有关的异常),由于其规模较大,往往有一部分被冰川覆盖.如纳日贡玛,它是三江成矿带东北端一个大型斑岩铜钼矿床.从该区冰碛测量结果表明,Cu、Mo异常有部分被现代冰川所覆盖,反映了冰斗南侧仍有Cu、Mo矿化体存在,但已接近边缘.外围元素Pb、Zn、Ag、Mn等已在冰川北部出现.类似的情况还有陆日格、众根涌.有的甚至异常主要部分亦被冰川覆盖,如君乃涌Ⅰ号异常带就是.该异常带是由十多个元素组成的多元素异常;从综合异常图(图件均从略-编者)可见,Cu、Mo、Sn及其他元素异常等值线都在北部向冰川开着口(未封闭),而且愈近冰川,异常强度愈高,高温成矿元素异常仅
I. PROBLEM PROBLEMS During the regional geochemical anomaly tracking and evaluation process in the alpine mountainous area of southern Qinghai, we found that many geochemical anomalies are closely related to the glacier’s spatial location. Some anomalies (especially with the porphyry copper deposit Due to its large size, there is often a part of it covered by glaciers, such as the Nagisa Gomma, which is a large porphyry copper-molybdenum deposit at the northeast end of the Sanjiang metallogenic belt. The results of moraine measurements show that Cu The Mo anomaly is partially covered by modern glaciers, reflecting the presence of Cu and Mo mineralized bodies on the south side of the ice bucket but close to the margin. The outer elements such as Pb, Zn, Ag and Mn have appeared in the northern part of the glacier. The situation is also Luge grid, Chung Chung Chung, and some even anomalous main part is also covered by glaciers, such as the Junai Chung Ⅰ anomaly is that the anomaly is a multi-element anomaly consisting of more than a dozen elements from the comprehensive anomaly As can be seen from the figure (all omitted), the anomalies of Cu, Mo, Sn and other anomalies are open to the glacier in the north (not closed), and closer to the glacier, the higher the anomaly intensity is, the higher the temperature is Abnormal elements only