作者单位:王庆权(广东省东莞市 523075 南城区市行政文化中心东莞市科学技术博物馆;Earth Sciences Department, University of California at Santa Cruz, CA95064, USA;广州市 510640 中国科学院广州地球化学研究)Jim Gillb(Earth Sciences Department, University of California at Santa Cruz, CA95064, USA)朱炳泉(广州市,510640,中国科学院广州地球化学研究)Ken Collersonb(Earth Sciences Department, University of California at Santa Cruz, CA95064, USA;Department of Earth Sciences, University of Queensland, Brisbane, QLD 4072, Australia)