Temperature dependence of thermal diffusivity and conductivity for sandstone and carbonate rocks
Temperature dependence of thermal diffusivity and conductivity for sandstone and carbonate rocks
复制标题
砂岩和碳酸盐岩的热扩散率和电导率的温度依赖性
DOI：
10.1007/s10973-017-6631-7
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发表时间：
2018-02
影响因子：
4.4
通讯作者：
Yongsheng Zhou
中科院分区：
文献类型：
--
作者：
Sheqiang Miao;Yongsheng Zhou
砂岩和碳酸盐岩的热扩散率和热导率是模拟沉积盆地地表热流和热状态的重要参数。利用激光闪光技术研究了白云石、石灰石、卡拉拉大理石和四种砂岩的热扩散率（D）随温度的变化关系。激光闪光技术的测量精度为±2%，并将晶格成分与直接辐射传递隔离开来，温度可达973 K。在室温下，白云石、石灰石、卡拉拉大理石和砂岩样品的D分别为2.62、1.34、1.22和1.30-2.22 mm 2 s − 1。砂岩的D与样品中石英的含量有很强的相关性，在973 K时，所有样品的D都单调下降到0.30-0.62 mm 2 s-1。结果进行了比较，从以前的研究与激光闪光分析数据。将这些结果与从模态矿物学导出的热容和测量的密度相结合，我们得到了热导率（k）。测量的k接近或低于使用结构模型从岩石的矿物成分计算的k。这表明，热传导比模型中所表示的更复杂，并且现场测量对于准确获得岩石的热导率是必不可少的。最后，计算出的温度依赖k值被用于热流计算的岩石样品。
Thermal diffusivity and conductivity of sandstone and carbonate rocks are essential parameters for modeling surface heat flow and thermal regimes in sedimentary basins. The temperature dependence of the thermal diffusivity (D) of dolomite, limestone, Carrara marble, and four types of sandstone was studied using the laser flash technique, which is accurate (±2%) and isolates the lattice component from the direct radiative transfer, at temperatures up to 973 K. At room temperature,Dwas 2.62, 1.34, 1.22, and 1.30–2.22 mm2s−1for the dolomite, limestone, Carrara marble, and sandstone samples, respectively. The sandstoneDcorrelated strongly with the quartz content of the samples.Dof all the samples decreased monotonically to 0.30–0.62 mm2s−1at 973 K. The results were compared with laser flash analysis data from previous studies. Combining these results with the heat capacity derived from modal mineralogy and the measured density, we obtained the thermal conductivity (k). The measuredkwas near or lower than that calculated from the rock’s mineral components using structural models. This suggests that thermal conduction is more complicated than that represented in the models, and that in situ measurement is essential to accurately obtain the thermal conductivity of rocks. Finally, the calculated temperature-dependentkvalue was used in the heat flow calculation for the sampled rock.
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影响因子：
1.4
作者：
A. Hofmeister
通讯作者：
A. Hofmeister
影响因子：
3.8
作者：
J. Merriman;A. Whittington;A. Hofmeister;P. Nabelek;K. Benn
通讯作者：
J. Merriman;A. Whittington;A. Hofmeister;P. Nabelek;K. Benn
DOI：
10.1130/abs/2016am-286226
发表时间：
2016
期刊：
--
影响因子：
--
作者：
J. Merriman;A. Hofmeister;A. Whittington
通讯作者：
J. Merriman;A. Hofmeister;A. Whittington
理想气体比重法测量陨石体积的新方法
影响因子：
--
作者：
Li Shijie;Wang Shijie;Li Yang;Liu Shen;Ian M. Coulson
通讯作者：
Ian M. Coulson
影响因子：
3.2
作者：
PARKER, WJ;JENKINS, RJ;BUTLER, CP
通讯作者：
BUTLER, CP