/* DATA DESCRIPTION:
Citation:	Hyun, Sangmin; Han, Sang-Joon; Taira, Asahiko (2002): (Table 2) Age control points and sedimentation rates for sediment cores of the eastern edge of Shikoku Basin [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.842480, 
	Supplement to: Hyun, S et al. (2002): Barium in hemipelagic sediment of the northwest Pacific: Coupling with biogenic carbonate. Paleoceanography, 17(4), 1066, https://doi.org/10.1029/2001PA000651
Abstract:	Geochemical analyses were performed on three cores of hemipelagic sediment from the northwest Pacific Ocean (eastern edge of Shikoku Basin) dating from the last interglacial and glacial periods. The objective of this work is to delineate the relations between excess sedimentary barium [Ba(ex)] content and biogenic opal, carbonate, and organic carbon contents. Calculated Ba(ex) values show variable degrees of correlation with biogenic sediment fractions. The mass accumulation rate (MAR) of Ba(ex) covaries with the MARs of biogenic fractions, and in particular, with the MAR of biogenic carbonate (r**2 = 0.68) and TOC (R**2 = 0.50). Variable relations between barium and biogenic fractions in hemipelagic sediment provide detailed insight into the behavior of sedimentary barium. It appears that a significant proportion of the barium is affiliated with the carbonate fractions. Based on this strong correlation, carbonate dissolution rates of the last glacial to interglacial periods are estimated. Assuming that the MARs of carbonate and Ba(ex) covary, variation of the Ba/Ca ratio in sediments reflects the extent of postdepositional carbonate dissolution. The record of sedimentary Ba/Ca ratios exhibits striking difference between sediment of the glacial and interglacial periods, with a higher positive correlation during glacial intervals and a lower correlation during interglacial intervals; this pattern is the result of enhanced carbonate dissolution during interglacial times. Sedimentary Ba/Ca ratios may, therefore, be a useful tool for estimating the relative extent of carbonate dissolution. Ba(ex) curves and patterns in sedimentary Ba/Ca ratios resemble the established Pacific carbonate dissolution record (i.e., enhanced dissolution during interglacial times and reduced dissolution during glacial times) as suggested by previous studies. Variations in sedimentary Ba/Ca ratios strongly support an interpretation of pronounced glacial-interglacial fluctuation in carbonate dissolution in the northwest Pacific Ocean. An especially pronounced dissolution event is evident at 75 kyr during the transition interval form interglacial to glacial conditions. This suggests that Ba(ex) may be used as a proxy for evaluating carbonate dissolution in hemipelagic settings, but further study of the association between barium content and carbonate dissolution will be required to confirm this.
Related to:	Murayama, M; Matsumoto, E; Nakamura, T; Okamura, M; Yasuda, H; Taira, A (1993): Re-examination of the eruption age of Aira-Tn ash(AT) obtained from a piston core off Shikoku. Journal of the Geological Society of Japan, 99, 787-798, https://doi.org/10.5575/geosoc.99.787
Coverage:	MEDIAN LATITUDE: 32.264443 * MEDIAN LONGITUDE: 138.231667 * SOUTH-BOUND LATITUDE: 30.376670 * WEST-BOUND LONGITUDE: 137.591670 * NORTH-BOUND LATITUDE: 33.753330 * EAST-BOUND LONGITUDE: 138.648330
	MINIMUM DEPTH, sediment/rock: 0.000 m * MAXIMUM DEPTH, sediment/rock: 8.500 m
Event(s):	KT92-17_20 * LATITUDE: 30.376670 * LONGITUDE: 138.648330 * ELEVATION: -3280.0 m * LOCATION: Northwest Pacific * CAMPAIGN: KT92-17 * BASIS: Tansei Maru * METHOD/DEVICE: Piston corer (PC)
	KT93-7_4 * LATITUDE: 33.753330 * LONGITUDE: 137.591670 * ELEVATION: -2274.0 m * LOCATION: Northwest Pacific * CAMPAIGN: KT93-7 * BASIS: Tansei Maru * METHOD/DEVICE: Piston corer (PC)
	KT93-7_6 * LATITUDE: 32.663330 * LONGITUDE: 138.455000 * ELEVATION: -3272.0 m * LOCATION: Northwest Pacific * CAMPAIGN: KT93-7 * BASIS: Tansei Maru * METHOD/DEVICE: Piston corer (PC)
Parameter(s):	Event label (Event)
	DEPTH, sediment/rock [m] (Depth sed) * GEOCODE
	Age, comment (Comm) * PI: Hyun, Sangmin (smhyun@sari.kordi.re.kr)
	Age, dated [ka] (Age dated) * PI: Hyun, Sangmin (smhyun@sari.kordi.re.kr)
	Age, dated, standard deviation [±] (Age dated std dev) * PI: Hyun, Sangmin (smhyun@sari.kordi.re.kr)
	Age model [ka] (Age model) * PI: Hyun, Sangmin (smhyun@sari.kordi.re.kr)
	Sedimentation rate [cm/ka] (SR) * PI: Hyun, Sangmin (smhyun@sari.kordi.re.kr)
	Comment (Comment) * PI: Hyun, Sangmin (smhyun@sari.kordi.re.kr)
License:	Creative Commons Attribution 3.0 Unported (CC-BY-3.0) (URI: https://creativecommons.org/licenses/by/3.0/)
Size:	71 data points
*/
Event	Depth sed [m]	Comm	Age dated [ka]	Age dated std dev [±]	Age model [ka]	SR [cm/ka]	Comment
KT93-7_4	1.032	AMS-14C	12.23	0.48		8.44	
KT93-7_4	1.701	AMS-14C	14.35	0.15		31.50	
KT93-7_4	3.027	AMS-14C	22.85	0.48		15.60	
KT93-7_4	3.310	d18O			25.00	13.16	
KT93-7_6	0.235	AMS-14C	2.26	0.80		10.39	
KT93-7_6	0.570	AMS-14C	5.04	0.80		12.05	
KT93-7_6	2.510	d18O			18.00	14.97	
KT93-7_6	3.815	AMS-14C	25.46	0.42		17.49	
KT93-7_6	6.070	d18O			62.00	6.17	
KT92-17_20	0.000	AMS-14C	5.22	0.30			
KT92-17_20	0.420	AMS-14C	13.81	0.19		5.29	
KT92-17_20	1.230	AMS-14C	17.56	0.70		18.38	
KT92-17_20	1.710	AMS-14C	22.57	0.70		9.69	
KT92-17_20	1.980	Aira-Tn ash	24.30	0.23			from Murayama et al. (1993)
KT92-17_20	2.090	AMS-14C	24.09	0.21		19.98	
KT92-17_20	5.120	d18O			58.96	8.73	
KT92-17_20	6.090	d18O			73.91	6.52	
KT92-17_20	6.570	d18O			79.25	9.03	
KT92-17_20	6.870	d18O			90.95	2.57	
KT92-17_20	8.500	d18O			123.82	4.94