嫦娥一号干涉成像光谱仪数据再校正与全月铁钛元素反演

凌宗成; 张江; 刘建忠; 李勃; 武中臣; 倪宇恒; 孙灵芝; 陈剑

嫦娥一号干涉成像光谱仪数据再校正与全月铁钛元素反演

- 1.
  山东大学空间科学研究院, 山东省光学天文与日地空间环境重点实验室, 威海 264209;中国科学院月球与深空探测重点实验室, 北京 100012
- 2.
  山东大学空间科学研究院, 山东省光学天文与日地空间环境重点实验室, 威海 264209
- 3.
  中国科学院地球化学研究所, 贵阳 550002
基金项目:
本文受国家自然科学基金项目(41490634、41473065、U1231103、41373068)、科技部基础性工作专项(2015FY210500)、山东省自然科学基金项目(JQ201511、ZR2015DQ001)、中国科学院重点部署项目(KGZD-EW-603)、中国科学院月球与深空探测重点实验室开放基金项目和山东大学(威海)青年学者未来计划(2015WHWLJH14)联合资助.

收稿日期: 2015-06-14

修回日期: 2015-09-20

刊出日期: 2016-01-31

Lunar global FeO and TiO2 mapping based on the recalibrated Chang'E-1 IIM dataset

- 1.
  Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai 264209, China;Key Laboratory of Lunar and Deep Space Exploration, Chinese Academy of Sciences, Beijing 100012, China
- 2.
  Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai 264209, China
- 3.
  Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China

Received Date: 14 June 2015

Revised Date: 20 September 2015

Publish Date: 31 January 2016

摘要

摘要: 月球表面的元素和物质成分分布是理解月球成岩与地质演化历史的重要线索。嫦娥一号干涉成像光谱仪(IIM)是我国首台月球探测成像光谱仪器,其获得的大量月球高光谱数据已成为我国未来探测月球成分与地质演化研究的宝贵基础数据。本文利用探月工程地面应用系统发布的IIM B版本2C级数据,开发出一套数据再定标流程,获得了较为可靠的月表相对反射率数据。我们在新校正数据的基础上开展月球表面FeO、TiO2的反演建模,获得了全月FeO和TiO2分布图,这些图件是进行月球地质填图的基础。校正数据反演的FeO和TiO2分布与前人对Clementine UVVIS数据的反演结果相近,表明干涉成像光谱仪数据具有较大的应用潜力。高地的低铁岩石成分(一般小于8%)佐证了月球月壳形成的过程中的岩浆洋分异假说,而月海玄武岩的TiO2成分变化范围较大(0~13%)则表明月海玄武岩来源于不同的月幔源区。根据嫦娥一号干涉成像光谱仪全月FeO分布图,可将月球表面物质类型总体划分为高地斜长岩和月海玄武岩,而根据TiO2分布可以进一步将月海玄武岩划分为5种不同钛含量的玄武岩岩石类型。FeO和TiO2在全月范围内的分布表明Apollo和Luna返回的月球样品不能够代表全月范围内的矿物成分多样性,月球岩浆演化历史比前人认为的要复杂。未来月球样品返回任务(如嫦娥五号)如能赴这些特殊地区进行取样,将很有可能返回重要的月球科学研究发现和成果。
- 嫦娥一号 /
- 干涉成像光谱仪数据 /
- 数据再校正 /
- FeO反演 /
- TiO₂反演
Abstract: Lunar global FeO and TiO2 distributions are keys to understand the petrogenesis and geologic evolution history of the Moon. As the first Chinese lunar mission, Chang'E-1 has acquired a large amount of lunar hyperspectral dataset, i.e., Imaging Interferometer (IIM) data, for the latter on lunar surface compositional mapping and geological studies. We develop a new set of data processing pipeline and recalibrated the B version of Chang'E-1 IIM level 2C data. Then we obtain new algorithms of lunar FeO and TiO2 estimations and produce the global lunar FeO and TiO2 maps, which would be the key components for the lunar geologic mapping using Chang'E-1 data. The derived Chang'E-1 global FeO and TiO2 distributions are consistent with the previous results from Clementine UVVIS. The derived low FeO content (typically less than 8%) in the highland confirms the lunar crustal differentiation history of Magma Ocean. The wide range of TiO2 content (0~13%) and its heterogeneous distributions across the lunar surface suggest the mare basalts have very different mantle source regions. The lunar rock types can be divided into highland and mare rocks in terms of FeO distribution, moreover, the lunar mare rock can be classified as five types of mare basalts according to their TiO2 contents, indicating the different evolutions of the lunar crust and late volcanisms. More importantly, the global FeO and TiO2 maps of Chang'E-1 IIM further emphasized the concept that samples from Apollo and Luna missions could not represent the global compositional and mineral diversities, thus future lunar sample return missions (e.g., Chang'E-5) targeting for those uncommon locations are necessary and would bring in great science returns.
- Chang'E-1 /
- Imaging Interferometer (IIM) data /
- Data recalibration /
- FeO /
- TiO₂

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嫦娥一号干涉成像光谱仪数据再校正与全月铁钛元素反演

Lunar global FeO and TiO2 mapping based on the recalibrated Chang'E-1 IIM dataset

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