本文選題：月球 + 雨海��； 參考：《中國科學:物理學 力學 天文學》2016年02期

【摘要】：月球的巖漿活動揭示了其演化規(guī)律.月海玄武巖的規(guī)模,反映了月幔的部分熔融程度和源區(qū)的深度,對研究月球玄武巖的成因和熱演化具有重要意義.月球愛拉托遜紀的巖漿活動在雨海盆地堆積了大面積溢流、光譜獨特的高/中鈦玄武巖,他們是了解雨海晚期熱演化的鑰匙.本文基于多種遙感數(shù)據(jù),分別利用地形剖面分析法和月坑挖掘深度法,對雨海不同出露情況的各期次晚期玄武巖的厚度和體積進行研究,并簡要探討了噴發(fā)通量的變化.研究結果表明,上愛拉托遜紀地層(UEm)厚度為13 33 m,單層熔巖流的厚度為(11±4)m.下愛拉托遜紀地層(LEm)厚度為14.49 43.61 m.將UEm地層的出露體積(~539.3 km~3),LEm地層的出露體積(~5198 km~3)和UEm下伏晚期玄武巖的體積(~556.2 km~3)相加,得到雨海晚期玄武巖總體積為~6479 km~3,遠低于Schaber的估計(~4×10~4 km~3).其中,UEm玄武巖出露體積占LEm玄武巖出露體積的比例1/8,表明雨海愛拉托遜紀玄武巖噴發(fā)逐漸減少.本文還基于各UEm單元的出露面積和定年數(shù)據(jù),得到了局部雨海晚期玄武巖面積通量的變化:Em5減少了249.56 km~2/Ma,Em6減少了39.49 km~2/Ma,Em7減少了46.89 km~2/Ma,表明雨海晚期的巖漿活動逐漸減弱.
[Abstract]:The magmatic activity of the moon reveals its evolution law. The scale of the lunar basalt reflects the degree of partial melting of the lunar mantle and the depth of the source region, which is of great significance to the study of the genesis and thermal evolution of the lunar basalt. The magmatic activity of the Ailatossian period on the moon accumulates large area overflow and unique spectral high / medium titanium basalt in the Yuhai basin, which is the key to understand the thermal evolution of the late rain sea. Based on various remote sensing data, the thickness and volume of basalt in different stages of outburst in rain sea are studied by using topographic profile analysis and lunar pit excavation depth method, respectively, and the variation of eruption flux is discussed briefly. The results show that the thickness of UE is 13 ~ 33 m and the thickness of monolayer lava flow is 11 鹵4 m. The LEmthickness of the Lower Altorisian strata is 14.49 ~ 43.61 m. The total volume of basalt in late stage of UEm is 6 479 km / m ~ 3, which is far lower than that estimated by Schaber, and the volume of late basalt in UEm is 556.2 km ~ (3), which is far lower than the estimated volume of 4 脳 10 ~ (4) km / m ~ (3) of Schaber. The ratio of outburst volume of LEm basalt to that of UEM basalt is 1 / 8, which indicates that the eruption of basalt decreases gradually. Based on the outcropping area and dating data of each UEm unit, the variation of the area flux of basalt in the late stage of the local rain sea is obtained. The variation of the area flux of basalt in the late stage of the rain sea is reduced by 249.56 km2 / 2 / 6 and by 39.49 km2 / 2 / Maem7 by 46.89 km2 / 2Maa, which indicates that the magmatic activity in the late stage of the rain sea gradually decreases.
【作者單位】： 南京大學地理與海洋科學學院;江蘇省地理信息資源開發(fā)與利用協(xié)同創(chuàng)新中心;中國科學院行星科學重點實驗室;澳門科技大學太空科學研究所;江蘇省有色金屬華東地質勘查局;
【基金】：中國科學院重點部署項目(編號:KGZD-EW-603) 國家自然科學基金(批準號:41172296,41422110) 澳門科學技術發(fā)展基金(編號:048/2012/A2)資助
【分類號】：P184

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