Ling Zongcheng, Jolliff Bradley L, Wang Alian, Li Chunlai, Liu Jianzhong, Zhang Jiang, Li Bo, Sun Lingzhi, Chen Jian, Xiao Long, Liu Jianjun, Ren Xin, Peng Wenxi, Wang Huanyu, Cui Xingzhu, He Zhiping, Wang Jianyu
Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai 264209, China.
Department of Earth &Planetary Sciences and McDonnell Center for the Space Sciences, Washington University, St Louis, Missouri 63130, USA.
Nat Commun. 2015 Dec 22;6:8880. doi: 10.1038/ncomms9880.
The chemical compositions of relatively young mare lava flows have implications for the late volcanism on the Moon. Here we report the composition of soil along the rim of a 450-m diameter fresh crater at the Chang'e-3 (CE-3) landing site, investigated by the Yutu rover with in situ APXS (Active Particle-induced X-ray Spectrometer) and VNIS (Visible and Near-infrared Imaging Spectrometer) measurements. Results indicate that this region's composition differs from other mare sample-return sites and is a new type of mare basalt not previously sampled, but consistent with remote sensing. The CE-3 regolith derived from olivine-normative basaltic rocks with high FeO/(FeO+MgO). Deconvolution of the VNIS data indicates abundant high-Ca ferropyroxene (augite and pigeonite) plus Fe-rich olivine. We infer from the regolith composition that the basaltic source rocks formed during late-stage magma-ocean differentiation when dense ferropyroxene-ilmenite cumulates sank and mixed with deeper, relatively ferroan olivine and orthopyroxene in a hybridized mantle source.
相对年轻的月海熔岩流的化学成分对月球晚期火山活动具有重要意义。在此，我们报告了嫦娥三号（CE-3）着陆点一个直径450米的新鲜撞击坑边缘土壤的成分，该研究由玉兔号月球车通过原位主动粒子诱导X射线光谱仪（APXS）和可见近红外成像光谱仪（VNIS）测量完成。结果表明，该区域的成分与其他月海样本返回点不同，是一种此前未采样过的新型月海玄武岩，但与遥感结果一致。嫦娥三号的风化层源自具有高FeO/（FeO+MgO）的橄榄石标准玄武岩。VNIS数据的反褶积显示存在大量高钙铁辉石（普通辉石和易变辉石）以及富铁橄榄石。我们从风化层成分推断，玄武岩源岩形成于晚期岩浆海洋分异过程中，当时致密的铁辉石钛铁矿堆积物下沉，并与混合地幔源中更深层、相对富铁的橄榄石和斜方辉石混合。
Zotero 插件