| 大别超高压榴辉岩高温高压下电导率实验研究 |
| |
| 引用本文： | 朱茂旭, 谢鸿森, 赵志丹, 郭捷, 白武明. 大别超高压榴辉岩高温高压下电导率实验研究[J]. 地球物理学报, 2001, 44(01): 93-102, |
| |
| 作者姓名： | 朱茂旭 谢鸿森 赵志丹 郭捷 白武明 |
| |
| 作者单位： | 1. 中国科学院地球化学研究所,贵阳 550002; 2. 中国地质大学,北京 100083; 3. 中国科学院地质与地球物理研究所,北京 100101 |
| |
| 摘 要： | 为研究大陆中下地壳高导层成因及与物质组成之间的关系，用模拟实验的方法在不同的温度、压力条件下分别测定了干的和1mol/LNaCl溶液饱和的榴辉岩的电导率.结果表明，干榴辉岩平行线理方向的电导率比垂直于线理方向的高，但两个方向上的活化能相近.在中下地壳条件下，干榴辉岩的电导率比中下地壳高导层电导率值低几个数量级.常温下1mol/LNaCl溶液饱和的榴辉岩两个方向上的电导率对压力具有不同的依赖性；在中下地壳条件下，1mol/LNaCl溶液饱和的榴辉岩的电导率可达到一般高导层的电导率值.无论干的还是饱和的榴辉岩都不能解释大别山20—50km深处的高导层成因，因此，在该深度范围内榴辉岩不可能是主要的岩石组成.
|
| 关 键 词： | 高温高压 榴辉岩 电导率 阻抗谱 |
| 收稿时间： | 2000-04-26 |
| 修稿时间： | 2000-08-15 |
EXPERIMENTAL STUDIES ON ELECTRICAL CONDUCTIVITY OF THE DABIE ULTRAHIGH-PRESSURE ECLOGITES AT HIGH PRESSURES AND HIGH TEMPERATURES |
| |
| ZHU MAO XU, XIE HONG SEN, ZHAO ZHI DAN, GUO JIE, BAI WU MING. EXPERIMENTAL STUDIES ON ELECTRICAL CONDUCTIVITY OF THE DABIE ULTRAHIGH-PRESSURE ECLOGITES AT HIGH PRESSURES AND HIGH TEMPERATURES[J]. Chinese Journal of Geophysics (in Chinese), 2001, 44(01): 93-102, |
| |
| Authors: | ZHU MAO XU XIE HONG SEN ZHAO ZHI DAN GUO JIE BAI WU MING |
| |
| Affiliation: | 1. Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China; 2. China University of Geosciences, Beijing 100083, China; 3. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100101, China |
| |
| Abstract: | Electrical conductivity is measured for dry and saturated with 1M NaCl eclogites at various pressures and temperatures, which are prevalent in the mid and lower crust. The results show that the electrical conductivity of dry eclogites parallel to the lineation is higher than that perpendicular to the lineation, however the activation energies are similar along both directions. The conductivity of dry eclogites at conditions of the mid and lower crust is several orders of magnitude lower than that of average highly conductive layers （HCL）. At room temperature, the dependence of the conductivity of saturated eclogites on pressure is different in directions parallel and perpendicular to the lineation. The conductivity of saturated eclogites at mid and lower crust conditions is in the range of values of average HCL. However, the electrical conductivity of eclogites, regardless dry or satruated, is even much lower than that of Dabieshan HCL at the depths between 20 and 50km beneath the surface, and therefore is not used to explain the genesis of this HCL. Thus eclogites are not the main rock type at such depths in Dabieshan area. |
| |
| Keywords: | High temperatures and high pressures Eclogites Electrical conductivity Impedance spectroscopy |
|
| 点击此处可从《地球物理学报》浏览原始摘要信息 |
|
点击此处可从《地球物理学报》下载全文 |
|
