A team led by geochemist alberto saal of brown university decided to use a more sensitive method .
由brown大学的地球化学家albertosaal带领的小组决定采用一个更敏感的方法。
Other scientists , including paul knauth , an isotope geochemist at arizona state university , tempe , are more open to retallack 's arguments .
其他科学家包括但佩市亚利桑那州立大学同位素地球化学家鲍尔-克劳斯，则更乐意接受丽塔来克的论点。
Geochemist and lead author zachary sharp of the university of new mexico , albuquerque , explains that the chlorine isotope ratio is a highly reliable indicator of the amount of hydrogen a planetary body contains .
Geochemist stephen grasby of the geological survey of canada in calgary and colleagues report online today in nature geoscience a new twist on the volcano notion .
The team was led by marine geochemist dr doug connelly , of the national oceanography centre in southampton , and marine biologist dr jon copley , of theuniversityofsouthampton .
