next up previous [pdf]

Next: Bibliography Up: Liu etc.: Stacking using Previous: Conclusion


We would like to thank Yang Liu and Jingye Li for inspiring discussions and three reviewers for helpful suggestions. G. Liu would like to thank the China Scholarship Council (grant 2007U44003) for partial support of this work. X. Chen's research was supported partially by the National Basic Research Program of China (973 program, grant 2007CB209606) and by the National High Technology Research and Development Program of China (863 program, grant 2006AA09A102-09). Publication was authorized by the Director, Bureau of Economic Geology, The University of Texas at Austin.