????:1?????????:????KB?

2????????????

3?????600?????

4???????

5??????????

??????????????????1?15???????????????? (??? ????)??15??????????(?????????????)??,??,?????????????,?????,???????????????

?????????????«??:?????????»(Journal of Geophysical Research: Planets)??????????????(?)???????????????????

?????????????,??????????????,???????????????,??????????????????????????????,???????????????,??

??,????????,???????????????????????????????????????????????,??????????????????,????????????????????????

“????????,????????,????????????????????”?????????????????????

???????????????,??,?????????????(???????39?????????10?????),??,??????????????????????????????????????,????32???????????,???

??????????????????????,?????,??,????????,?????????????????(??????) ????:?????