12 to the Moon!

A 12 member crew is dispatched by the Earth's International Space Order to the Moon. Once landed they begin their exploration where they discover a deep cave, gold, and other valuable minerals. But when they fire a mortar into a rock formation, burning liquid begins bubbling out. Back inside the ship a machine begins printing out an ominous message from "The Great Coordinator of the Moon" telling them to leave at once. Back on Earth they find that the Moon-beings have frozen parts of it and plan to drop atomic "bomblets" into a volcano to thaw out the land. They are sabotaged and are now on a suicide mission to thaw the Earth and keep the Moon-beings at bay.