| 火山沉积岩及其矿床研究中伽马测井曲线解释的误区 |
| |
| 引用本文： | 冯宝华.火山沉积岩及其矿床研究中伽马测井曲线解释的误区[J].物探与化探,2008,32(2):171-174. |
| |
| 作者姓名： | 冯宝华 |
| |
| 作者单位： | 中国地质科学院,北京,100037 |
| |
| 摘 要： | 根据酸性凝灰岩和酸性火山事件粘土岩的自然伽马测井曲线,对当前流传的"沉积岩层的放射性强度(或放射性核素的含量)随泥质含量的增加而增高"的概念和用自然伽马值及经验公式求泥质含量提出质凝。酸性凝灰岩的自然伽马曲线有高异常响应,若解释为泥岩显然是误解,故将沉积岩伽马曲线高异常一律解释为泥岩是片面的。各类火山事件粘土岩的伽马值相差悬殊,但其泥质含量几乎相等,用它们的伽马值计算泥质含量误差甚大。最后对铝土矿层的伽马曲线稍加解释,指出核测井应用的远景。
|
| 关 键 词： | 酸性凝灰岩 火山事件粘土岩 自然伽马测井曲线 异常解释 |
| 文章编号： | 1000-8918(2008)02-0171-04 |
| 收稿时间： | 2007-06-30 |
| 修稿时间： | 2007年6月30日 |
A MISTAKE IN THE INTERPRETATION OF GAMMA LOG CURVE FOR THE STUDY OF VOLCANIC SEDIMENTARY ROCKS AND RELATED ORE DEPOSITS |
| |
| FENG Bao-hua.A MISTAKE IN THE INTERPRETATION OF GAMMA LOG CURVE FOR THE STUDY OF VOLCANIC SEDIMENTARY ROCKS AND RELATED ORE DEPOSITS[J].Geophysical and Geochemical Exploration,2008,32(2):171-174. |
| |
| Authors: | FENG Bao-hua |
| |
| Institution: | Chinese Academy of Geological Sciences, Beijing 100037, China |
| |
| Abstract: | Based on the natural gamma log curves of acid tuff and clay rocks of acid volcanic events, the author here queries the arguments that radioactive intensity of sedimentary strata will grow with the increasing argillaceous materials and that the natural gamma value and the empirical equation can be used to calculate contents of argillaceous materials. The natural gamma curve of acid tuff has high anomaly response, which can not be interpreted as the response of the mudstone. If we regard the gamma curve of high anomaly exclusively as anomaly of mudstone, the viewpoint is obviously one-sided. The gamma values of clay rocks of various volcanic events are different very considerably, and hence the utilization of the gamma values to calculate the contents of argillaceous materials is likely to result in remarkable errors. In the end of this paper, the author has explained in brief the gamma curve of the bauxite bed and discussed the prospects of the nuclear log. |
| |
| Keywords: | acid tuff clay rock of volcanic event natural gamma log curve anomaly interpretation |
| 本文献已被 维普 万方数据 等数据库收录！ |
| 点击此处可从《物探与化探》浏览原始摘要信息 |
| 点击此处可从《物探与化探》下载免费的PDF全文 |
|
