Density, porosity, and magnetic susceptibility of carbonaceous chondrites
Density, porosity, and magnetic susceptibility of carbonaceous chondrites
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DOI：
10.1111/j.1945-5100.2011.01298.x
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发表时间：
2011-12-01
影响因子：
2.2
通讯作者：
Britt, Daniel T.
中科院分区：
文献类型：
--
作者：
Macke, Robert J.;Consolmagno, Guy J.;Britt, Daniel T.
我们报告的物理性能（体积和颗粒密度，磁化率和孔隙度）测量使用无损和非污染的方法从63碳质方解石195石头。整个群体的平均粒密度为3.44 g cm-3，范围从2.42 g cm-3（CI 1 Orgueil）到5.66 g cm-3（CB本库宾）。磁化率（在10-9立方米公斤-1的日志单位）平均日志？= 4.22，范围从3.23（CV 3 Axtell）到5.79（CB本库宾）。孔隙率平均为17%，范围从0（对于一些陨石）到41%（对于一颗CO奥尔南斯）。值得注意的是，我们发现氧化和还原CV亚组之间的孔隙率存在显著差异，CVo的孔隙率平均约为20%，CVr孔隙率约为4%。总的来说，碳质球粒陨石的孔隙度福尔斯趋势与岩相类型，从类型1（CI）接近35%，类型2（CM，CR）平均23%，类型3（CV，CO）21%，类型4（CK和一些CO）平均15%。也有一个显着的减少之间的孔隙度陨石的冲击阶段S1和那些S2，表明冲击压缩。
We report physical properties (bulk and grain density, magnetic susceptibility, and porosity) measured using nondestructive and noncontaminating methods for 195 stones from 63 carbonaceous chondrites. Grain densities over the whole population average 3.44 g cm-3, ranging from 2.42 g cm-3 (CI1 Orgueil) to 5.66 g cm-3 (CB Bencubbin). Magnetic susceptibilities (in log units of 10-9 m3 kg-1) averaged log ? = 4.22, ranging from 3.23 (CV3 Axtell) to 5.79 (CB Bencubbin). Porosities averaged 17%, ranging from 0 (for a number of meteorites) to 41% (for one stone of the CO Ornans). Notably, we found significant differences in porosity between the oxidized and reduced CV subgroups, with the porosities of CVo averaging approximately 20% and CVr porosities approximately 4%. Overall, porosities of carbonaceous chondrite falls trend with petrographic type, from type 1 (CI) near 35%, type 2 (CM, CR) averaging 23%, type 3 (CV, CO) 21%, to type 4 (CK and some CO) averaging 15%. There is also a significant decrease in porosity between meteorites of shock stage S1 and those of S2, indicative of shock compression.