Carbon materials in Antarctic and nonAntarctic carbonaceous chondrites: high-resolution transmission electron microscopy
Carbon materials in Antarctic and nonAntarctic carbonaceous chondrites: high-resolution transmission electron microscopy
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南极和非南极碳质球粒陨石中的碳材料：高分辨率透射电子显微镜
DOI：
10.2465/jmps.070301
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发表时间：
2008
影响因子：
0.7
通讯作者：
J. Akai
中科院分区：
文献类型：
--
作者：
T. Aoki;J. Akai
使用高分辨率透射电子显微镜 (HRTEM) 研究了来自八个南极碳质球粒陨石（CM2、CO3 和 CV3 类型）和两个非南极碳质球粒陨石（CM2 和 CV3 类型）的碳材料。在七颗南极球粒陨石和一颗非南极 CM2 球粒陨石中发现了纳米金刚石和“碳质球”。这些结果表明纳米金刚石和碳质球在碳质球粒陨石中很常见。在经历水合后高温热变质作用的陨石中发现碳质球表明它们对热变质作用具有抵抗力。结晶良好的石墨主要存在于CV3型和CO3型球粒陨石中，而结晶不良的石墨主要存在于CM2型球粒陨石中。 CM2型球粒陨石还含有类似于四面体碳洋葱和多层富勒烯的特征碳结构。在这项研究中，我们讨论了这些类型的碳材料的起源。
Carbon materials from eight Antarctic carbonaceous chondrites (CM2, CO3, and CV3 types) and two nonAntarctic carbonaceous chondrites (CM2 and CV3 types) were studied using a high-resolution transmission electron microscope (HRTEM). Nanodiamonds and “carbonaceous globules” were found in seven of the Antarctic chondrites and one nonAntarctic CM2 chondrite. These results suggest that nanodiamonds and carbonaceous globules are common in carbonaceous chondrites. The finding of carbonaceous globules in the meteorites that experienced post-hydration high-temperature thermal metamorphism suggests that they are resistant to thermal metamorphism. Well-crystallized graphite was mainly found in the CV3- and CO3-type chondrites, whereas poorly crystallized graphite was mainly found in the CM2-type chondrites. The CM2-type chondrites also contain characteristic carbon structures that are similar to tetrahedral carbon onions and multilayered fullerene. In this study, we discuss the origin of these types of carbon material.
碳质球粒陨石的水化后热变质作用
影响因子：
0.7
作者：
Tomoki Nakamura
通讯作者：
Tomoki Nakamura