Variation Diagram for major elements only. Whole rock geochemical data from the US Geological Survey Petros Database. Click on the x-axis and y-axis button to change the plotting variables. Mouseover a datapoint for information about the sample. FeO(T) is total Fe recalculated as FeO. Click on a Dataset button to choose one of the following datasets:

• ALEUTIAN ARC AND BERING SEA ISLANDS (ALU)
• BOULDER BATHOLITH, MONTANA, USA (BLB)
• BUSHVELD COMPLEX, AFRICA (BUS)
• BOUNDARY BATHOLITHS, B.C., CANADA--USA (BZM)
• COLUMBIA RIVER GROUP BASALTS, WA-OR-ID, USA (COL)
• DECCAN TRAPS, INDIA (DEC)
• HAWAIIAN AND RELATED ISLANDS, PACIFIC OCEAN (HAW)
• ICELAND (ISL)
• KOMATIITES ETC. ARCHEAN AFRICA, CANADA (UMF)
• LESOTHO KIMBERLITES LESOTHO, AFRICA (LES)
• LEUCITE HILLS WYOMING, USA (LEU)
• OCEAN FLOOR ATLANTIC (O-A)
• OCEAN FLOOR PACIFIC (O-P)
• SAMOA ISLANDS PACIFIC OCEAN (SAM)
• SIERRA NEVADA BATHOLITH CA-NV, USA (SRN)
• SKAERGAARD INTRUSION GREENLAND (SKD)
• SNAKE RIVER PLAIN IDAHO, USA (SNK)
• TROODOS OPHIOLITE COMPLEX CYPRUS (TRO)

For more information about these data, visit the NOAA website (https://data.noaa.gov/).    

You can upload your own data from a comma separated value file (.csv) by clicking on the "Choose File" button. The first row of the .csv file has the oxide and element labels, and subsequet rows have sample data.     .csv File Format Instructions    Your uploaded file will not be passed to the other diagram or map pages, but can be uploaded again on those pages.   

2.1 Variation Diagrams (wt.%)
2.2 Variation Diagrams (mole%)
2.4 TAS Volcanic Rocks
2.5 TAS Plutonic Rocks
Igneous Tools List.