Centimeter to decimeter hollow concretions and voids in Gale Crater sediments, Mars
Centimeter to decimeter hollow concretions and voids in Gale Crater sediments, Mars
复制标题
火星盖尔陨石坑沉积物中厘米至分米的中空结核和空隙
DOI：
10.1016/j.icarus.2017.02.003
复制
发表时间：
2017
期刊：
影响因子：
3.2
通讯作者：
Wiens [including W. Goetz]
中科院分区：
文献类型：
--
作者：
Wiens [including W. Goetz]
在火星盖尔陨石坑中，沿着Currency漫游者的横向沿着几个位置出现了直径在101厘米到23厘米之间的空洞和中空球体。这些中空的球形特征与以前着陆任务中观察到的任何东西都有很大不同。空洞出现在暗色调、粗糙纹理的露头中，最明显的是在Point Lake（溶胶302-305）和Twin凯恩斯岛（溶胶343）。Point Lake显示了非常接近的空洞和胶结球体;其他位置显示了一种或另一种形式。球状体有1-4毫米厚的壁，在所有情况下都显得相对暗色调，有些带有红色色调。只有一个空心球体（温尼珀索基，溶胶653）进行了分析的组成，出现镁铁质（富铁），相对长英质的寄主岩石。球状体的内表面似乎具有与外部相似的组成，可能的例外是更多的水合和轻微的Fe和K耗尽。球状体的起源是火星的玻璃陨石或火山弹，这似乎不太可能，因为它们的中空和相对脆弱的性质，以及没有明显的火成岩。一个更可能的解释都是空洞和空心球体的反应，还原铁与氧化地下水，然后再沉淀的化学反应前沿胶结外壳结核。虽然一些类似的陆地结核是由前体菱铁矿或黄铁矿产生的，但成岩矿物也可能是其他陆地结核的直接沉淀物。大风沉积物不同于陆地砂岩在其高的初始铁含量，也许促进了更高的发生这样的成岩反应。
Voids and hollow spheroids between ∼1 and 23 cm in diameter occur at several locations along the traverse of the Curiosity rover in Gale crater, Mars. These hollow spherical features are significantly different from anything observed in previous landed missions. The voids appear in dark-toned, rough-textured outcrops, most notably at Point Lake (sols 302–305) and Twin Cairns Island (sol 343). Point Lake displays both voids and cemented spheroids in close proximity; other locations show one or the other form. The spheroids have 1–4 mm thick walls and appear relatively dark-toned in all cases, some with a reddish hue. Only one hollow spheroid (Winnipesaukee, sol 653) was analyzed for composition, appearing mafic (Fe-rich), in contrast to the relatively felsic host rock. The interior surface of the spheroid appears to have a similar composition to the exterior with the possible exceptions of being more hydrated and slightly depleted in Fe and K. Origins of the spheroids as Martian tektites or volcanic bombs appear unlikely due to their hollow and relatively fragile nature and the absence of in-place clearly igneous rocks. A more likely explanation to both the voids and the hollow spheroids is reaction of reduced iron with oxidizing groundwater followed by some re-precipitation as cemented rind concretions at a chemical reaction front. Although some terrestrial concretion analogs are produced from a precursor siderite or pyrite, diagenetic minerals could also be direct precipitates for other terrestrial concretions. The Gale sediments differ from terrestrial sandstones in their high initial iron content, perhaps facilitating a higher occurrence of such diagenetic reactions.
登录
查看更多内容
DOI：
10.1007/bf01822152
发表时间：
1981-06
期刊：
Geologische Rundschau
影响因子：
--
作者：
R. Schmid
通讯作者：
R. Schmid
影响因子：
56.9
作者：
Rebecca M. E. Williams;J. Grotzinger;W. Dietrich;Sanjeev Gupta;D. Sumner;R. Wiens;N. Mangold;M. Malin;K. Edgett;S. Maurice;O. Forni;O. Gasnault;A. Ollila;H. Newsom;G. Dromart;M. Palucis;R. Yingst;R. Anderson;K. Herkenhoff;S. Mouélic;W. Goetz;M. Madsen;A. Koefoed;J. Jensen;J. Bridges;S. Schwenzer;K. Lewis;K. Stack;D. Rubin;Linda C. Kah;J. Bell;J. Farmer;R. Sullivan;T. V. Beek;D. Blaney;O. Pariser;R. Deen
通讯作者：
Rebecca M. E. Williams;J. Grotzinger;W. Dietrich;Sanjeev Gupta;D. Sumner;R. Wiens;N. Mangold;M. Malin;K. Edgett;S. Maurice;O. Forni;O. Gasnault;A. Ollila;H. Newsom;G. Dromart;M. Palucis;R. Yingst;R. Anderson;K. Herkenhoff;S. Mouélic;W. Goetz;M. Madsen;A. Koefoed;J. Jensen;J. Bridges;S. Schwenzer;K. Lewis;K. Stack;D. Rubin;Linda C. Kah;J. Bell;J. Farmer;R. Sullivan;T. V. Beek;D. Blaney;O. Pariser;R. Deen
盖尔陨石坑的 ChemCam 远程微型成像仪：火星第一年运行回顾
影响因子：
3.2
作者：
S. Mouélic;O. Gasnault;K. Herkenhoff;N. Bridges;Y. Langevin;N. Mangold;S. Maurice;R. Wiens;P. Pinet;H. Newsom;R. Deen;J. Bell;Jeffrey R. Johnson;W. Rapin;B. Barraclough;D. Blaney;L. Deflores;J. Maki;M. Malin;R. Perez;M. Saccoccio
通讯作者：
M. Saccoccio
好奇号火星着陆点表面材料的 ChemCam 被动反射光谱
影响因子：
3.2
作者：
Jeffrey R. Johnson;J. Bell;S. Bender;D. Blaney;E. Cloutis;L. Deflores;B. Ehlmann;O. Gasnault;B. Gondet;K. Kinch;M. Lemmon;S. Mouélic;S. Maurice;M. Rice;R. Wiens
通讯作者：
R. Wiens
影响因子：
56.9
作者：
McLennan, S. M.;Anderson, R. B.;Yingst, R. A.
通讯作者：
Yingst, R. A.