深部隐伏多金属矿碘的地球化学原生异常

基于碘元素的地球化学特性,本文研究了碘晕在深部隐伏多金属矿床上的发育特征.通过勘查实例,重点阐明了几种不同赋矿地质条件下碘的地球化学原生异常分布模式;统计不同矿区岩石和垂直矿体部位岩、矿石中碘元素的平均含量的变化规律,确定了碘异常的分散距离,指出它在垂宜分带序列中一直处于序列之首,是地球化学找矿中典型的远程指示元素.确认碘异常在深部隐伏矿找矿中,可以发挥独特的指示作用.

GEOCHEMICAL PRIMARY IODINE ANOMALIES AROUNDDEEP-SEATED CONCEALED POLYMETALLIC DEPOSITS

Based on geochemical characteristics of iodine, this paper has studied thedevelopment of iodine haloes around deep-seated concealed polymetallic depo-sits. With case history of exploration, it describes in detail distribution patte-rns of geochemical primary iodine anomalies under several different ore-hostinggeological conditions; through statistical study of variation regularity of ave-rage bone content in rocks from different ore districts and in rocks and/orores perpendicular to the ore body, we have determined the dispersion distan-ce of iodine anomaly, and pointed out that this element lies invariably at thehead of the vertical zonation and therefore serves as a distant indicator ele-ment. It is firmly believed that boine anomalies can play a unique indicatingrole in the prospecting for deep-seated concealed ore deposits.