The origin of 10Be in island-arc volcanic rocks

Details The origin of 10Be in island-arc volcanic rocks The origin of 10Be in island-arc volcanic rocks

Aug 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988e%26psl..89..288m&link_type=abstract

Earth and Planetary Science Letters, Volume 89, Issue 3-4, p. 288-298.

Other

11

Scientific paper

The presence of cosmogenic 10Be (t1/2 = 1.5 × 106 y) in island-arc volcanic rocks has been interpreted as indicating that sediments are subducted to the depths of island-arc magma genesis [1,2]. We have measured 10Be and 9Be (the stable common isotope) in phenocryst and groundmass fractions separated from four Aleutian volcanic rocks. 10Be and 9Be covary linearly in three of the rocks proving that the 10Be was incorporated prior to the formation of phenocrysts. In the other rock 10Be and 9Be do not covary; the lack of covariation indicates either that the rock incorporated 10Be during weathering or that 9Be-rich xenocrysts were incorporated by mechanical mixing. Our results strongly support the hypothesis of Brown et al. [1] and Tera et al. [2] that sediments containing 10Be are an integral part of island-arc magmatic systems. As we cannot identify the depth at which the 10Be was incorporated we still cannot completely rule out the possibility of assimilation of sediments or altered crust near the Earth's surface as a source of 10Be.

Affiliated with

Also associated with

No associations

Rating

The origin of 10Be in island-arc 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 origin of 10Be in island-arc volcanic rocks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The origin of 10Be in island-arc volcanic rocks will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1693967