“协优”成矿预测方法的理论探索与实践

"Xieyou" Metallogenic Prediction Method:Theoretical Exploration and Practice

根据西藏野外地质工作难度大、工作程度极低、找矿信息少且获取极其困难这一实际,在认真学习、吸收前辈成矿预测理论精髓及大量找矿实践和理论思考的基础上,基于系统性、关联性、目标一致性、不充足判据的充足化、复杂与精确的反比性原则,提出了西部工作程度极低地区快速逼近找矿目标的"协优"成矿预测法,即只要优选出少量相互关联、目标一致、最能揭示某种类型成矿本质特征的关键信息组合,就可能导致该类型矿床被发现.强调直接信息的先导作用及少数相互关联信息的明确指示意义,突出信息与预测目标的一致性,这样可有效减少信息的不确定性和多解性,从而降低找矿风险.试图从另一个视角、另一种思路来认识和探讨西部工作程度极低地区的成矿预测问题.该方法应用于冈底斯、北喜马拉雅及念青唐古拉等成矿带的勘查实践,找矿取得了巨大突破.这对促进冈底斯相邻地区乃至整个西部地区的找矿评价、技术方法进步等具有重要的参考与借鉴意义.

Geological field work in Tibet is rather tough and some information is unavailable for metallogenic prediction. Based on the former research achievements and the principle that highlights systematic, relevant, consistent in terms of target, integrated in criteria and contrasted in complexity and high accuracy, a new location prediction theory--＂Xieyou＂ metallogenic prediction method, for areas with very bad conditions in West China is proposed, which is a ＂rapid approach to the prospecting target＂. This theory holds that only by selecting the combination of several key pieces of information which are relevant to each other, have a consistent target and reflect some characteristics of the special deposit, can we find such special deposit. The key point is that great stress should be laid on the leading function of the direct information and the implication of some relevant in- formation, so as to highlight the coincidence between information and the prediction target, with which uncertainty and multi- solutions of information can be decreased and the prospecting risks can be reduced. This theory tries to discuss the metallogenic prediction from another aspect in prospecting field, which is practised in the areas with very bad conditions in West China. Lots of ore deposits were found in Gangdese, north Himalaya and Nyainqentanglha metallogenic belts by applying this method, which may accelerate the ore prospecting process and improve prospecting method in Gangdese area, or even in all the west are- as of China.