An eText of Geochemical Data Interpretation

"The only thing more expensive than education - is ignorance" - Ben Franklin

Most recently updated pages: REE global-element-dist1 Andesites-ultra-high-K OIB-volcanic-atlantic ORB-oceanic-pacific GeoNorm

About Bernie Gunn - an informal C.V.

*Glossary of Abbreviations*

Geokem

• General:
  • Background to this site
  • Composition of the Earth's Mantle and Crust
  • The Average Composition of the Earth's Continental Crust
  • Global Element Distribution
  • Fingerprints
  • Element Concentration Processes
  • Minerals
  • GeoNorm
    
    
• Oceanic Ridge Basalts (ORBs):
  • Summary
  • Atlantic Spreading Centres
  • Pacific/Indian Spreading Centres
    
    
• Oceanic Island Basalts (OIBs) & Alkaline Series:
  • Summary
  • Antarctic
  • Atlantic Ocean
  • Iceland
  • Indian Ocean
  • Hawaii
  • Pacific Ocean
  • Continental alkali basalts-basanites
    
    
• Continental Flood Basalts:
  • Gondwana Jurassic Flood Basalts and Sills. Ferrar Dolerites (Ant), Tasmanian Dolerites, Karoo, Etendeka, Parana, Deccan
  • Columbia River, Steens Mtn, Snake River Plains, Basin & Range, Palisades Sill, British Tertiary, N.Atlantic-E.Greenland
  • Archaean Sudbury Lopolith, Coppermine-Muskox, Stillwater, Bushveldt
    
    
• Orogenic Andesites:
  • Summary
  • Lesser Antilles
  • Mexico; Central America; Andes; Scotia Arc; and the Cascades Province
  • Aleutians, Kamchatka, Kuriles, Japan, Mariannas, Philippines, East Indies, Solomons, the New Hebrides, Fiji, Tonga and New Zealand
  • Ultra High K Andesites of Continental Interiors; Argentina; Cent. USA; Roman Province; Aeolian Arc; Aegean Arc; Turkey; Tibet
    
    
• Special Chemical Types:
  • Rare Earths
  • Carbonatites
  • Sodic and Potassic Granites
  • Lamprophyres.
  • Rhyolites Trachytes and Phonolites
  • Archaean MetaBasalts, and MetaAndesites
  • Sediments
  • Isotopes
    
    
• Extraterrestrial geochemistry:
  • Lunar Basalts and Anorthosites
  • Mars
  • Venus
  • Tektites
  • Other Meteorites
    
    
• Performing Good Lab Work

We recommend using the above menu, but search this site if you must.

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This site is aimed at helping graduate research workers with geochemical problems.

Description of this Geochemistry Website

Here we give very brief descriptions of most types of terrestrial and lunar igneous rocks, their regional distribution and classification, and examples of their geochemical trends and "fingerprints".

Clicking on the minature "thumbprints" will allow the diagrams to be shown at a larger size. Enough examples are shown for any new data to be typed.
To return to text when viewing diagrams click on your browser's "Back" button.
Further information, variation diagrams etc can be requested by e-mail.

The reference given at the base of each diagram is that of the producer of the (usually) published data. The diagrams are mainly original, few have been previously published. A good deal of liberty has also been taken in the interpretation of the data so that the whole web page is coherent. Space does not permit detailed discussion of pros and cons. We are adding some published abstracts to each data series and this is helped by authors sending us .pdf files of their papers.