PetDB: Information System for Geochemical Data of Igneous and Metamorphic Rocks from the Ocean Floor
PetDB archives and serves analytical data for whole rocks, glasses, minerals, melt inclusions, with emphasis on basalts and abyssal peridotites. PetDB contains major, trace-element, and isotope ratios for samples from mid-ocean ridge basalts, back-arc basins, young near-ridge seamounts, and old oceanic crust.
Search PetDB
PetDB is a member of EarthChem, the consortia for integrated data management in Solid Earth Geochemistry. Learn more about EarthChem...
Is a reference missing? Do you have data you would like to contribute? Become part of PetDB community and contact us
.
PetDB sample locations viewed in the GeoMapApp browser. GeoMapApp is an integrated mapping application developed as part of the Marine Geoscience Data System.
News
| 9-2008 | Ridge2000 Lau ISS Integration and Synthesis Workshop, Salt Lake City September 7-9, 2008 |
| 7-2008 | Goldschmidt, 2008 Workshop: "Using Online Geochemical Databases for Research and Teaching" Vancouver, BC |
| 5-2008 | PetDB featured in Open Geospatial Consortium's (OGC) website of the month link |
| PetDB cited more than 200 times in the scientific literature! See a list of papers here. |
|
| Map Query now available! |
Featured Article
M. Carpentier, C. Chauvel, and N. Mattielli (2008). "Pb-Nd isotopic constraints on sedimentary input into the Lesser Antilles Arc system." EARTH AND PLANETARY SCIENCE LETTERS 272:199-211. doi:10.1016/j.epsl.2008.04.036
"Lesser Antilles lavas exhibit a large range of Pb-Nd isotopic compositions, which includes the most radiogenic Pb isotopic compositions known for intra-oceanic arcs. They are also characterized by a strong chemical zoning from north to south along the arc, with the highest Pb isotope ratios being found in the southern islands. We studied the geochemical characteristics of subducting sediments at different latitudes, in order to constrain a potential north-south chemical gradient in the sediments. We show that mixing of local depleted mantle with sediments subducting under the northern part of the arc could explain the northern island lava Pb-Nd isotopic compositions. In the south, subducting sediments display higher Pb isotopes, and mixing of local depleted mantle with these sediments satisfactory explains the very radiogenic Pb isotopic composition of lavas from the southern part of the Lesser Antilles arc. Using PetDB, we compiled data for Atlantic MORB to determine the Pb and Nd isotopic compositions of the local depleted mantle. When combined with our measurements on the subducting sediments, these data helped us to evaluate the sedimentary contribution in the Lesser Antilles magma genesis." - M. Carpentier
See previously featured articles |
PetDB is is supported by the National Science Foundation and managed as part of the GfG Program |
 |