3D porosity structure of the earliest solar system material.
3D porosity structure of the earliest solar system material.
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DOI：
10.1038/s41598-022-11976-1
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发表时间：
2022-05-19
影响因子：
4.6
通讯作者：
中科院分区：
文献类型：
--
作者：
碳质榴辉岩（CC）含有最早保存的太阳系物质，含有这种物质的物体是许多样品返回任务的目标。实验室和遥感数据都表明，这种材料可以是高度多孔的，但这种多孔性的起源和性质目前还不清楚。由于CC内的大多数孔隙度的尺寸为亚微米至微米，因此先前的实验室工作受到有限的观测尺度的限制，该观测尺度要求使用当前可用的技术来检查该孔隙度。在这里，我们提出了一种新开发的技术，允许亚微米孔隙度进行检查，在3D内的CM Murchison的12立方毫米的体积的结果。我们使用X射线计算机断层扫描结合高衰减惰性气体氙来表征远低于数据空间分辨率（3.01 µm/体素）的孔隙度。这种方法不仅允许在比以前可能的大得多的体积内检查亚微米孔隙度，而且还揭示了完整的三维孔隙结构和孔隙连通性。我们的数据显示，一些细粒轮辋（FGRs）周围的球粒具有复杂的三维孔隙结构，这表明FGRs的形成通过尘埃聚集体或可变的二次加工后的边缘吸积。
Carbonaceous chondrites (CCs) contain the earliest preserved Solar System material, and objects containing this material are targets of numerous sample return missions. Both laboratory and remote sensing data have shown that this material can be highly porous, but the origin and nature of this porosity is currently not well understood. Because the majority of porosity within CCs is submicron to micron in size, previous lab efforts have been restricted by the limited observational scale required to examine this porosity with currently available techniques. Here we present results from a newly developed technique that allows submicron porosity to be examined in 3D within a 12 mm3 volume of CM Murchison. We use X-ray computed tomography combined with the highly attenuating noble gas xenon to characterize porosity well below the spatial resolution of the data (3.01 µm/voxel). This method not only allows examination of submicron porosity within a significantly larger volume than previously possible but also reveals the full three-dimensional porosity structure and pore connectivity. Our data reveal that some fine-grained rims (FGRs) surrounding chondrules have a complex 3D porosity structure, suggesting formation of the FGRs via dust aggregates or variable secondary processing around the rim after accretion.
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DOI：
10.1111/j.1945-5100.1989.tb00941.x
发表时间：
1989-03-01
期刊：
METEORITICS
影响因子：
--
作者：
MAKJANIC, J;TOURET, JLR;VERHEUL, H
通讯作者：
VERHEUL, H
影响因子：
7.4
作者：
Mayo, Sheridan;Josh, Matthew;Hall, Chris
通讯作者：
Hall, Chris
影响因子：
5
作者：
Lewis, Jonathan A.;Jones, Rhian H.;Garcea, Serafina C.
通讯作者：
Garcea, Serafina C.
影响因子：
13.6
作者：
Rozitis B;Ryan AJ;Emery JP;Christensen PR;Hamilton VE;Simon AA;Reuter DC;Al Asad M;Ballouz RL;Bandfield JL;Barnouin OS;Bennett CA;Bernacki M;Burke KN;Cambioni S;Clark BE;Daly MG;Delbo M;DellaGiustina DN;Elder CM;Hanna RD;Haberle CW;Howell ES;Golish DR;Jawin ER;Kaplan HH;Lim LF;Molaro JL;Munoz DP;Nolan MC;Rizk B;Siegler MA;Susorney HCM;Walsh KJ;Lauretta DS
通讯作者：
Lauretta DS
影响因子：
5
作者：
Friedrich, Jon M.;Rivers, Mark L.
通讯作者：
Rivers, Mark L.