TY - JOUR
T1 - Reply to Comment on "On the importance of opal, carbonate, and lithogenic clays in scavenging and fractionating 230Th, 231Pa and 10Be in the ocean"
AU - Luo, Shangde
AU - Ku, Teh Lung
N1 - Funding Information:
We thank the editor of EPSL for providing this forum enabling us to extend our evaluation of the problem to a larger database provided by Chase and co-workers. This research is supported by the US National Science Foundation under Grant OCE-0117895. [BOYLE]
PY - 2004/3/30
Y1 - 2004/3/30
N2 - We extend our analysis of the Chase et al. data [Earth and Planetary Science Letters 204 (2002) 215-229] to those other than from the equatorial Pacific and the Southern Ocean. The analysis offers support to our previous conclusion that Kd(Th) for carbonate is on the order of ∼ 1.0 × 106 g/g, or about two orders of magnitude smaller than that for open-ocean lithogenics. There is a lowering of Kd(Th) of lithogenics at high-lithogenic sites attributable to factors including the sediment remobilization from ocean-margin deposits. But the lowered Kd(Th) of lithogenics is still about one order of magnitude greater than that of carbonate at those high-lithogenic sites. Using an independent method, we estimate that Kd,l(Th) is > (2.2 ± 0.9) × 108 g/g at stations adjacent to our EqPac sites, reinforcing our conclusion that the major scavenger for 230Th is lithogenic, not carbonate particles, even in the low-lithogenic open ocean.
AB - We extend our analysis of the Chase et al. data [Earth and Planetary Science Letters 204 (2002) 215-229] to those other than from the equatorial Pacific and the Southern Ocean. The analysis offers support to our previous conclusion that Kd(Th) for carbonate is on the order of ∼ 1.0 × 106 g/g, or about two orders of magnitude smaller than that for open-ocean lithogenics. There is a lowering of Kd(Th) of lithogenics at high-lithogenic sites attributable to factors including the sediment remobilization from ocean-margin deposits. But the lowered Kd(Th) of lithogenics is still about one order of magnitude greater than that of carbonate at those high-lithogenic sites. Using an independent method, we estimate that Kd,l(Th) is > (2.2 ± 0.9) × 108 g/g at stations adjacent to our EqPac sites, reinforcing our conclusion that the major scavenger for 230Th is lithogenic, not carbonate particles, even in the low-lithogenic open ocean.
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U2 - 10.1016/S0012-821X(04)00029-9
DO - 10.1016/S0012-821X(04)00029-9
M3 - Comment/debate
AN - SCOPUS:1842428738
SN - 0012-821X
VL - 220
SP - 223
EP - 229
JO - Earth and Planetary Science Letters
JF - Earth and Planetary Science Letters
IS - 1-2
ER -