深穿透地球化学迁移模型

Conceptual model of deep-penetrating geochemical migration.

深穿透地球化学是针对寻找隐伏矿的需求而发展起来的一门新的地球化学分支学科,其理论基础由连续的几个要素构成:元素向地表的迁移机理→迁移到地表以后的赋存介质和赋存形式→形成异常模式的特征。本文针对元素从深部隐伏矿体向地表的迁移机理,总结了传统的具有代表性的3种迁移模型,包括离子扩散迁移模型、地下水溶解迁移模型和电化学迁移模型,并根据最新的研究成果,提出了地气流迁移模型和多营力迁移模型。这些模型的系统总结和提出对深穿透地球化学理论基础的建立和研究隐伏矿体元素的三维分散模式具有重要理论意义。

Deep-penetrating geochemistry is a new branch of geochemistry initiated for looking for concealed ore deposits. Its theoretical framework consists of several consecutive elements： mechanism of migration of elements from deeply buried deposits to the surface→modes of occurrence of elements in overburden at surface→geochemical anomaly patterns. With respect to the mechanism of migration of elements from deeply buried deposits to the surface, three traditional migration models are summa- rized： they are the models of ionic diffusion, groundwater dissolution and dispersion and electrochemically-induced dispersion. Based on the latest research results, the new conceptual models of earthgas streaming and multi-agent dispersion are proposed. The systematic summary and proposition of these models have great significance for the establishment of the theoretical basis of geochemistry and study of 3D element dispersion model of concealed deposits.