Growth rate of a deep-sea coral using 210 Pb and other isotopes

Details Growth rate of a deep-sea coral using 210 Pb and other isotopes Growth rate of a deep-sea coral using 210 Pb and other isotopes

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990gecoa..54.1493d&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 54, Issue 5, pp.1493-1499

Physics

6

Scientific paper

A deep-sea coral was studied to determine its growth rate and to reconstruct time histories of isotope distributions in the deep ocean. The specimen was collected at a depth of 600 m off Little Bahama Banks using the Deep Submergence Vehicle (DSV) Alvin . The growth rate of the calcitic coral trunk was determined using excess 210 Pb measured in concentric bands. Excess 210 Pb was found in the outer half of the coral's radius, and a growth rate of 0.11 ± 0.02 mm/a is calculated. Assuming a constant growth rate during formation of the entire trunk, an age of 180 ± 40 a is estimated for the coral. The decrease observed in radiocarbon activities measured on the same bands ( and , 1989) concurred with the growth rate estimated from excess 210 Pb activity. 239,240 pu activities measured by mass spectrometry were also detected in the outer two bands of the coral, as expected from the 210 Pb chronology. Stable oxygen and carbon isotopes measured in samples collected by a variety of techniques are positively correlated. This is evidence of a variable kinetic isotope effect most likely caused by variations in the skeletal growth rate. Long-lived corals such as this specimen have the potential for serving as integrators of seawater chemistry in the deep-sea over several century timescales.

Affiliated with

Also associated with

No associations

Rating

Growth rate of a deep-sea coral using 210 Pb and other isotopes 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 Growth rate of a deep-sea coral using 210 Pb and other isotopes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Growth rate of a deep-sea coral using 210 Pb and other isotopes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-780740