Computer Science
Scientific paper
Dec 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996gecoa..60.4765b&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 60, Issue 23, pp.4765-4772
Computer Science
Scientific paper
Continental mafic volcanic rocks commonly contain partially resorbed grains of quartz surrounded by reaction rims of granular pyroxene. 18 0 values for single grains and for grain-composites of quartz from a lherzolite-bearing flow from Mount Taylor, NM, are 8.18-10.54 and 9.77-10.68 , respectively, indicating that the quartz is crustally derived. In contrast, the S 18O values for xenocrystic olivine and pyroxene are 4.95-5.39 and 4.99-5.22 , respectively. Because only a small amount of contamination is required (<3-5%), major elements and strontium and neodymium isotopes do not yield a clear crustal signature. Yet contamination is sufficient to shift some trace element patterns and may affect lead isotopes and K/Ar dates. Our work suggests that crustal contamination of continental basalts may be cryptic and more widespread than previously recognized.
Baldridge Scott W.
Reid Kevin D.
Sharp Zachary D.
No associations
LandOfFree
Quartz-bearing basalts: Oxygen isotopic evidence for crustal contamination of continental mafic rocks does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Quartz-bearing basalts: Oxygen isotopic evidence for crustal contamination of continental mafic rocks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quartz-bearing basalts: Oxygen isotopic evidence for crustal contamination of continental mafic rocks will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1500214