It's probably possible to do so especially if there is significant overlap between chemistry and the other field (certainly the case with geology and environmental science). I know many chemistry majors who are in PhD programs studying some type of biology (molecular and cellular biology, biomedical sciences, biochemistry, immunology, biophysics, etc).
The best thing to do would be to contact the departments to which you are interested in applying. They should be able to tell you whether they would accept an applicant with a bachelors in chemistry.