Other
Scientific paper
Jun 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987gecoa..51.1727r&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 51, Issue 6, pp.1727-1741
Other
45
Scientific paper
Lithium is a moderately incompatible trace element in magmatic systems. High precision analyses for lithium conducted on well characterized suites of MORB and ocean island basalts suggest a bulk distribution coefficient of 0.25-0.35 and behavior which is similar to Yb during low pressure fractionation and V during melting, as long as garnet is not an important residual phase. Data for peridotites and basalts suggest a mantle lithium content of about 1.9 ppm and show that significant concentrations of lithium reside in olivine and orthopyroxene, resulting in unusual inter-mineral partitioning of Li and complex relationships between lithium and other incompatible trace elements. The lithium abundances of arc basalts are similar to those of MORB, but their Li/Yb ratios are considerably higher. The high Li/Yb suggests the addition of a Li-rich component to arc sources; relatively low Yb abundances are consistent with the derivation of some arc magmas by larger extents of melting or from a more depleted source than MORB. Although Li is enriched at arcs, K is enriched more, leading to elevated K/Li ratios in arc volcanics. The high K/Li and relatively low La/Yb of primitive arc basalts requires either incorporation of altered ocean crust into arc magma sources, or selective removal of K and Li from subducted sediments. Bulk incorporation of sediments alone does not explain the Li systematics. Data from primitive MORB indicate a relatively low (3-4 ppm) Li content for new oceanic crust. Thus, the Li flux from the ocean crust is probably <1 × 10 11 g/yr, and the oceanic crust may not be an important net source in the oceanic budget of lithium.
Langmuir Charles H.
Ryan Jeffrey G.
No associations
LandOfFree
The systematics of lithium abundances in young volcanic 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 The systematics of lithium abundances in young volcanic rocks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The systematics of lithium abundances in young volcanic rocks will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1817561