This is the most important source for identifying reports and journal articles about geology. The Crumb Library has many of the reports listed there, and can usually obtain others that you may need. The studies found listed here are not usually in the Crumb Library, but they can usually be obtained through Interlibrary Loan. Only a few geology journals are covered here. Chemical Abstracts is not currently received by the Crumb Library in paper, but it can be searched online.
Some journals have annual indexes to their articles.
This is a slow but possible way to search through a specific journal. Crumb Library Guide.