中子活化测井在萤石矿勘探中应用效果  

THE EFFECTIVENESS OF NEUTRON ACTIVATION LOGGING IN EXPLORING FLUORITE DEPOSITS

作　　者：师立谱 徐风曾 王世传 

机构地区：[1]山东省地质矿产局物化探大队

出　　处：《山东地质》1990年第2期84-97,共14页Geology of Shandong

摘　　要：本文简要叙述了中子活化测井原位测定萤石矿(CaF_2)含量的原理及方法技术,以及在两个萤石矿区试生产的成果实例。并着重指出: 1.该方法适用于各种不同类型的萤石矿。选择F作为CaF_2的特征指示元素,在萤石矿无其它元素干扰,方法反映单解。 2.工作证明:该方法可防止由于岩矿心破碎造成的地质取心中漏失的矿体,发现地质工作未确定的薄矿层。并能提供CaF_2含量。 3.在取心率很低的钻孔,提供了真实可靠的CaF_2含量和矿层上下顶板确切位置,避免了钻孔报废、取得了良好的经济效益。最后文章指出:该方法的精度、灵敏度和工作效率完全满足生产工作的需要。The present paper gives a brief account of the principle and techniques of neutron activation logging for in-situ determination of CaF_2 content in fluorite deposits and the results of their application in two fluorite ore districts. It is emphasized that(1)this method is applicable to various fluorite deposits. As fluorine is chosen as the indicator element of fluorite, and the fluorite ore contains no other element to interfere, the method always leads to only one solution. (2) the performance has shown that the method can prevent the possible failure to find the main ore beds due to the breaking of the drill cores during the drill core sampling, help to discover thin ore layers undetected byconventional geological means and furnish the values of CaF_2 content. (3) the method provides reliable data of CaF_2 content of the ore beds and right positions of their upper and lower boundaries in the drill holes with extremely low core recovery, thus saves the drill holes from being abandoned and yields good economic benefits.

关 键 词：中子活化 测井 萤石矿井 勘探 

分 类 号：P619.215[天文地球—矿床学]