Geochimica: database da consultare online

Geochemical data for solid earth samples provide essential information for answering fundamental questions about the Earth, from its compositional variation, to its history, structure, and dynamics:
Earthchem project - Advancing Data Management for Solid Earth Geochemistry

A source for regional and global Geology, Geochemistry, Geophysics, Mineral Resource maps & data:
Mineral Resources - On-Line Spatial Data

The Web Site for Earth Reference Data and Models: - Geochemical Earth Reference Model

Chemical data for more than 230,000 igneous rock samples is accessible through GEOROC:
Geochemistry of Rocks of the Oceans & Continents