本文選題：鎂尖晶石 + 輻射傳輸模型��； 參考：《中國(guó)科學(xué):物理學(xué) 力學(xué) 天文學(xué)》2016年02期

【摘要】：月球鎂尖晶石礦物隸屬于深成巖,可以通過撞擊作用被帶到月表,它蘊(yùn)含月殼深部甚至月幔的成分信息,對(duì)于研究月殼巖石成因與巖漿演化具有重要意義.本文分別從實(shí)驗(yàn)室和遙感研究?jī)煞矫嫦到y(tǒng)回顧月球鎂尖晶石礦物的研究進(jìn)展,以輻射傳輸模型為基礎(chǔ),作出了鎂尖晶石與輝石、橄欖石和斜長(zhǎng)石等礦物的一系列定量混合光譜.我們發(fā)現(xiàn)輝石與鎂尖晶石礦物的相對(duì)含量與光譜波段比值之間存在對(duì)數(shù)關(guān)系,由此利用二次方程來擬合這種關(guān)系,建立了鎂尖晶石礦物定量反演模型.以第谷(Tycho)撞擊坑為例,我們利用遙感成像光譜數(shù)據(jù)(M~3)發(fā)現(xiàn)其中央峰主要礦物有輝石、斜長(zhǎng)石和鎂尖晶石等,尤其是發(fā)現(xiàn)了輝石與鎂尖晶石的混合分布,但并未發(fā)現(xiàn)橄欖石礦物.利用上述礦物反演模型獲得的混合礦物中鎂尖晶石比例約為5.4vol% 6.4vol%,這與實(shí)驗(yàn)室月球樣品的研究結(jié)果相符.我們推測(cè)這種輝石與鎂尖晶石的混合礦物可能屬于深成巖,被撞擊作用抬升到月表,其中橄欖石只在坑壁附近發(fā)現(xiàn)有小范圍的分布,可能屬于淺層侵入巖.
[Abstract]:The lunar magnesite minerals belong to the deep diagenetic rocks and can be brought to the moon surface by impact, which contains the composition information of the deep lunar crust and even the lunar mantle, which is of great significance for the study of the genesis and magmatic evolution of the lunar crust rocks. In this paper, the research progress of lunar magnesium spinel minerals is reviewed systematically from laboratory and remote sensing studies. Based on the radiative transport model, a series of quantitative mixing spectra of magnesium spinel with pyroxene, olivine and plagioclase are obtained. It is found that there is a logarithmic relationship between the relative content of pyroxene and magnesium spinel mineral and the ratio of spectral band. The quantitative inversion model of magnesium spinel mineral is established by using the quadratic equation to fit the relationship. Taking Tycho impact crater as an example, we find that the main minerals of the central peak are pyroxene, plagioclase and magnesium spinel, especially the mixed distribution of pyroxene and magnesium spinel, but no olivine mineral. The proportion of magnesium spinel in the mixed minerals obtained by using the above mineral inversion model is about 5.4 voll%, which is in agreement with the experimental results of lunar samples. We conjecture that the mixed mineral of pyroxene and magnesium spinel may belong to the deep diagenetic rock and be uplifted to the moon surface by impact. The olivine is only found to be distributed in a small area near the pit wall, which may belong to the shallow intrusive rock.
【作者單位】： 山東大學(xué)空間科學(xué)研究院山東省光學(xué)天文與日地空間環(huán)境重點(diǎn)實(shí)驗(yàn)室;中國(guó)科學(xué)院月球與深空探測(cè)重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金(批準(zhǔn)號(hào):41490634,41473065,U1231103和41373068) 山東省自然科學(xué)基金(編號(hào):JQ201511,ZR2015DQ001和2015ZRE27590) 中國(guó)科學(xué)院重點(diǎn)部署項(xiàng)目(編號(hào):KGZD-EW-603) 中國(guó)科學(xué)院月球與深空探測(cè)重點(diǎn)實(shí)驗(yàn)室開放基金項(xiàng)目 山東大學(xué)(威海)青年學(xué)者未來計(jì)劃(編號(hào):2015WHWLJH14)聯(lián)合資助
【分類號(hào)】：P184.5

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