Most of the water was probably present originally as water trapped in clay minerals or as separate hydrogen ( in hydrocarbons ) and oxygen ( in iron oxides ),rather than as ice.

• 大部分的水最初可能被粘土矿物所捕获，或者以分离的氢(碳氢化合物)和氧(铁氧化物)的形式存在，而不是以冰的形式存在。