CAJ | 학술논문

对火星陨击坑壁上发育的冲沟进行研究,分析其成因和控制因素并进而探讨火星表面附近发生的地质过程,是当今火星研究的重要课题之一.采用分形理论对火星南半球中纬度9个陨击坑壁内不同方位发育的冲沟沟头形态进行了研究,结果表明沟头的分维值与冲沟发育程度呈显著的正相关关系.冲沟沟头的分维值大小分布与冲沟的方位关系密切,面向极地的冲沟分维值较大,面向赤道的冲沟分维值较小.陨击坑内不同方位冲沟所处位置的局部气候因素差异控制了水量的大小,从而造成陨击坑内不同方位冲沟发育程度和分维值大小的差异.研究结果为强调火星气候因素控制了冲沟形成的地表冰雪积累/融化成因模式提供了佐证.
대화성운격갱벽상발육적충구진행연구,분석기성인화공제인소병진이탐토화성표면부근발생적지질과정,시당금화성연구적중요과제지일.채용분형이론대화성남반구중위도9개운격갱벽내불동방위발육적충구구두형태진행료연구,결과표명구두적분유치여충구발육정도정현저적정상관관계.충구구두적분유치대소분포여충구적방위관계밀절,면향겁지적충구분유치교대,면향적도적충구분유치교소.운격갱내불동방위충구소처위치적국부기후인소차이공제료수량적대소,종이조성운격갱내불동방위충구발육정도화분유치대소적차이.연구결과위강조화성기후인소공제료충구형성적지표빙설적루/융화성인모식제공료좌증.
It is one of the most important challenges to research the controlling factors and formation mechanisms of Martian gullies at impact crater walls and sequentially to explore the geological processes near the surface of Mars. In this paper, the fractal theory was used to study the gully's alcoves in different orientations of nine craters at the mid-latitudes in the southern hemisphere of Mars. The results suggest significant positive correlation between the fractal characteristics of the gullies and the maturity of their development. The fractal values of the gully's alcoves have close relation to the orientations of gullies and the poleward facing gullies have higher fractal values than those of equatorward facing gullies. The local differences of climate characteristics in different orientations of the same crater walls mainly control the existence and amount of water, which causes the differences of the maturity and fractal values of gullies in different orientations of the crater walls. The results of our research provide one of the evidences for the accumulation/melting of surface snowpacks formation model.