Porphyry iron deposits are a typical deposit in the Yangtze River area. The deposits are of complicated spatial features and varied orebodies and sizes, thus resulting in some difficulties for resource reserve estimation. With focusing on resource reserve estimation of porphyry iron depsotis in the Middle and Lower Reaches of Yangtze River area, this study succefully combined 3D Surpac with tradional research method and established 3D models for orebodies, dykes and gangue minerals based on collecting and integrating a variety of geological data. Based on national standards and the traditional methods of reliability classification to indentify types of resource reserves, 3-D reserve estimation of porphyry iron deposits was conducted using a domain constrainted model. This study carried out an integrated estimation process, from the 3-D spatial interpretation, determination of ellipse parameters to probability classification and estimation of resources reserves, and compared the tradional method with the approach by Surpac and their results. The research results suggest that the latter can completely meet the requirements of related national standards for resources reserve estimation and can serve for submission of geological exploration reports. The result will have important practical significance and popularization value due to its quick and precise calculation of solid mineral resource reserves of the porphyry-type iron depsoits in the Middle and Lower Reaches of Yangtze River area and similar complicated solid deposits.%玢岩型铁矿床是长江中下游的一种典型矿床类型,矿床空间特征复杂,矿体形态多样,规模大小不一,对资源储量估算工作带来一定的难度.本文对长江中下游玢岩型铁矿床进行了资源储量估算研究,实现先进的三维矿业软件Surpac和传统地质研究方法的结合,在收集整理矿床地质综合资料的基础上,建立了矿体三维模型、脉岩三维模型、夹石三维模型等.并依照国家标准,以传统可靠性程度分类为依据划分资源储量类别,以建立块段约束体模型的方法,进行玢岩型铁矿床三维储量估算工作.实现了三维空间解译、搜索椭球参数的确定、资源储量的可靠程度分类、储量估算的全过程,并对传统可靠程度分类和Surpac软件提供的可靠程度分类的结果进行了对比分析,证明该方法完全满足我国资源储量估算工作的相关标准,可为提交地质勘探报告服务.本项成果在长江中下游玢岩型铁矿床及类似的复杂固体矿床储量快速、精确计算方面具有重要的实践意义和推广价值.
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