中文摘要:科学的成矿预测实质上是在正确的成矿分析基础上的合理推断。埠上金矿是胶东招掖金矿带中部的一个中型金矿，经过多年开采之后，后备储量严重不足，急待扩大远景储量。由于有50～- 200 m标高的采矿坑道及几个钻孔资料，使得采集不同垂深之样品成为易事，为矿床 原生晕方法提供了基础和前提。研究后认为，埠上金矿原生晕为正向分带序列，在-300 m标高之下有盲矿体存在，矿体向下仍有很大延伸，深部矿体向SW方向侧伏。到1 999年底，埠上金矿床开采深度已达-320 m中段，揭露到了被预测的矿化富集带的上部，深部矿体沿SW方向向下延伸。我们认为-400~- 500 m标高之间可能为该矿体的Au富集部位。
Abstract:Scientific metallogenic prognosis means reasonable inference based on correct analysis of metallogenesis. The Bushang gold deposit is a medium -size gold deposit in the central part of the Zhaoyuan gold ore belt in east Shandong. Having been exploited for m any years, the mine is severely deficient in reserves and is hence badly in need of expanding prospective reserves.The existence of data from mining galleries at the elevation of 50~ 200 m and several drill holes make it easy to collect samples at different vertical depths and provides grounds and prerequisite for the application of the primary halo technique. In the Bushang gold deposit, the study of the structural characteristics of geochemical anomalies in various sections and the key prognostic criteria constitutes the crux of evaluating ore-hunting prospects and looking for concealed orebodies. The element association of prim aryanomalies in the Bushang gold deposit consists of Au, Ag, Cu, M o, Bi, Pb, W, Mn and As, and the vertical zoning of primary haloes is Sb-As-Ba-Cu-Pb-Zn-Ag-Au-W -M n-C o-Ni in downward succession, belonging to norm al zonal sequence. The indicator elements in the front halo of the orebody are Sb, As and Ba; the nearore indicator elements include Cu, Pb, Zn Ag and Au; the indicator elements in the rear halo are W, Mn, Co and Ni. Relative to primary haloes of gold deposits in the northwestern part of east Shandong, the primary haloes in the Bushang gold deposit are characterized by quite high Au, Ag, Cu, M o, W, Co and Ni. Based on the study of p rimary haloes of the ore deposit, it is predicted that the part between -200 m and -300 m is the weak zone of the orebody, and that there might exist a blind orebody below -300 m, which extends considerably downward, gets enriched between -400 m and -500 m, and pitches southwestward with increasingly steeper angles. By the end of 1999, the mining work in the Bushang gold deposit had reached -320 m and the upper part of the predicted enriched zone had been exposed. It is shown that the orebody extends downward in southwest direction at depth.
keywords:prognosis of concealed orebody primary halo of ore deposit, normalzoning, Bushang gold deposit in Shandong
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基金项目:国家黄金局找矿项目“山东埠上金矿体分布规律及深部预测”（编号：09208）
引用文本：
代西武，杨建民，张成玉，于跃军，徐 珏，王风海，丘志刚.2000.利用矿床原生晕进行深部隐伏矿体预测——以山东埠上金矿为例[J].矿床地质,19(3):245~256.2000.The application of primary haloes of the ore deposit to the prognosis of deep concealed orebodies——Exemplified by the Bushang gold deposit in Shandong Province[J].Mineral Deposits19(3):245~256
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