Citation:

PANGAEA.945484

Name: Measured SC02 U/Th isotope activity ratios, calculated ages and monte-carlo derived age error, and Oxcal deposition model U-Th ages and associated age error
Published: 2022-06-17
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Borneo; Deglaciation; precipitation; rain; stalagmite; Termination I; tropics; Younger Dryas

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Published: 2022-06-17 • DOI registered: 2022-08-04

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Abstract:

U-Th ages were calculated using the initial detrital 230Th/232Th value of 111 ± 41 ppm, which was previously calculated for SC02 based on two isochrons measured in separate stalagmites from Secret Cave in Mulu (Carolin et al., 2013). A Matlab Monte Carlo script was used to calculated the absolute age and age errors associated with each U-Th sample using the 234U and 230Th half lives presented in Cheng et al. (2013). The Poisson-process deposition model feature in OxCal(v4.4) was used to interpolate between the eighteen U/Th ages to produce an age model (Bronk Ramsey, 2008; Bronk Ramsey and Lee, 2013).

Keyword(s):

Borneo; Deglaciation; precipitation; rain; stalagmite; Termination I; tropics; Younger Dryas

Related to:

Buckingham, Frances; Carolin, Stacy A; Partin, Jud; Adkins, Jess F; Cobb, Kim M; Day, Christopher; Ding, Quinghua; He, Chengfei; Liu, Zhengyu; Otto-Bliesner, Bette L; Roberts, William H G; Lejau, Syria; Malang, Jenny (2022): Termination 1 Millennial-Scale Rainfall Events Over the Sunda Shelf. Geophysical Research Letters, 49(5), https://doi.org/10.1029/2021GL096937

Other version:

Buckingham, Frances; Carolin, Stacy A; Partin, Jud; Adkins, Jess F; Cobb, Kim M; Day, Christopher (2022): Mulu Borneo stalagmite SC02 d18O and d13C 19.5-10.7 ky BP. Zenodo, https://doi.org/10.5281/zenodo.6026615

Further details:

Bronk Ramsey, Christopher; Lee, Sharen (2013): Recent and Planned Developments of the Program OxCal. Radiocarbon, 55(2), 720-730, https://doi.org/10.1017/S0033822200057878

Carolin, Stacy A; Cobb, Kim M; Adkins, Jess F; Clark, Brian; Conroy, Jessica L; Lejau, Syria; Malang, Jenny; Tuen, Andrew A (2013): Varied Response of Western Pacific Hydrology to Climate Forcings over the Last Glacial Period. Science, 340(6140), 1564-1566, https://doi.org/10.1126/science.1233797

Carolin, Stacy A; Cobb, Kim M; Lynch-Stieglitz, Jean; Moerman, Jessica W; Partin, Judson W; Lejau, Syria; Malang, Jenny; Clark, Brian; Tuen, Andrew A; Adkins, Jess F (2016): Northern Borneo stalagmite records reveal West Pacific hydroclimate across MIS 5 and 6. Earth and Planetary Science Letters, 439, 182-193, https://doi.org/10.1016/j.epsl.2016.01.028

Cheng, Hai; Edwards, R Lawrence; Shen, Chuan-Chou; Polyak, Victor J; Asmerom, Yemane; Woodhead, Jon D; Hellstrom, John C; Wang, Yongjin; Kong, Xinggong; Spötl, Christoph; Wang, Xianfeng; Alexander, E Calvin (2013): Improvements in 230Th dating, 230Th and 234U half-life values, and U–Th isotopic measurements by multi-collector inductively coupled plasma mass spectrometry. Earth and Planetary Science Letters, 371-372, 82-91, https://doi.org/10.1016/j.epsl.2013.04.006

Ramsey, Christopher Bronk (2008): Deposition models for chronological records. Quaternary Science Reviews, 27(1-2), 42-60, https://doi.org/10.1016/j.quascirev.2007.01.019

Coverage:

Latitude: 4.100000 * Longitude: 114.880000

Minimum DISTANCE: 3.8 cm * Maximum DISTANCE: 27.1 cm

Event(s):

SC02 * Latitude: 4.100000 * Longitude: 114.880000 * Elevation: 100.0 m * Location: Borneo * Method/Device: Speleothem sample (SPS) * Comment: Secret Chamber, Clearwater Cave system, Gunung Mulu National Park, Sarawak, Borneo

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Sample ID	Sample ID		Carolin, Stacy A		Sample ID labels begin with a two-letter pair (aa, ab, etc.) that define the sample batch followed by a two-digit number specifying the sample number in the particular batch
2	DISTANCE	Distance	cm	Carolin, Stacy A		Geocode – distance from the top of the stalagmite
3	Uranium-238	238U	µg/kg	Carolin, Stacy A		ppb
4	Thorium-232	232Th	µg/kg	Carolin, Stacy A		ppb
5	Thorium-232/Thorium-230 ratio	232Th/230Th		Carolin, Stacy A	Measured
6	Uranium-234/Uranium-238 activity ratio	(234U/238U)		Carolin, Stacy A
7	Uranium-234/Uranium-238 activity ratio, error	(234U/238U) e	±	Carolin, Stacy A		1s
8	Thorium-230/Uranium-238 activity ratio	(230Th/238U)		Carolin, Stacy A
9	Thorium-230/Uranium-238 activity ratio, error	(230Th/238U) e	±	Carolin, Stacy A		1s
10	Thorium-232/Uranium-238 activity ratio	(232Th/238U)		Carolin, Stacy A
11	Thorium-232/Uranium-238 activity ratio, error	(232Th/238U) e	±	Carolin, Stacy A		1s
12	Age, dated	Age dated	ka	Carolin, Stacy A	Uncorrected	raw age (ka from date analyzed), calculated ignoring any initial 230Th, 234U from detrital contaminants. All ages calculated using half-lives found in Cheng et al. (2013).
13	Thorium-230/Thorium-232 ratio (0)	230Th/232Th(0)		Carolin, Stacy A		initial atomic ratio used to calculate mean age (Carolin et al., 2013)
14	Thorium-230/Thorium-232 ratio (0)	230Th/232Th(0)		Carolin, Stacy A		minimum initial atomic ratio (uniform distribution) used to calculate age error (Carolin et al., 2013)
15	Thorium-230/Thorium-232 ratio (0)	230Th/232Th(0)		Carolin, Stacy A		maximum initial atomic ratio (uniform distribution) used to calculate age error (Carolin et al., 2013)
16	Age, dated	Age dated	ka	Carolin, Stacy A	Corrected	corrected for initial detrital Th contamination (ka from date analyzed)
17	Year of analysis	Year analysis	a AD	Carolin, Stacy A		C.E. year radiogenic isotopes measured in sample
18	Calendar age	Cal age	ka BP	Carolin, Stacy A	Monte Carlo method	Age before 1950 C.E.
19	Calendar age, error to older	Cal age e +	ka BP	Carolin, Stacy A	Monte Carlo method	95% confidence intervals for the ages are calculated using an internally developed Monte Carlo simulation with N=1e4
20	Calendar age, error to younger	Cal age e -	ka BP	Carolin, Stacy A	Monte Carlo method	95% confidence intervals for the ages are calculated using an internally developed Monte Carlo simulation with N=1e4
21	Uranium-234/Uranium-238 activity ratio (0)	234U/238U(0)		Carolin, Stacy A	Calculated, using the corrected age	Initial (234/238)
22	Uranium-234/Uranium-238 activity ratio (0), positive error	(234U/238U(0)) e+		Carolin, Stacy A	Calculated, using the corrected age	95% confidence intervals for the initial (234/238)
23	Uranium-234/Uranium-238 activity ratio (0), negative error	(234U/238U(0)) e-		Carolin, Stacy A	Calculated, using the corrected age	95% confidence intervals for the initial (234/238)
24	Calendar age, mean	Cal age mean	ka BP	Carolin, Stacy A	OxCal 4.4 Poisson-process deposition model feature
25	Calendar age, minimum/young	Cal age min	ka BP	Carolin, Stacy A	OxCal 4.4 Poisson-process deposition model feature	95% confidence range
26	Calendar age, maximum/old	Cal age max	ka BP	Carolin, Stacy A	OxCal 4.4 Poisson-process deposition model feature	95% confidence range

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Status:

Curation Level: Enhanced curation (CurationLevelC) * Processing Level: PANGAEA data processing level 3 (ProcLevel3)

Size:

450 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 Sample ID (Sample ID labels begin with a...)	2 Distance [cm] (distance from the top of the ...)	3 238U [µg/kg] (ppb)	4 232Th [µg/kg] (ppb)	5 232Th/230Th (Measured)	6 (234U/238U)	7 (234U/238U) e [±] (1s)	8 (230Th/238U)	10 (232Th/238U)	12 Age dated [ka] (raw age (ka from date analyze...)	13 230Th/232Th(0) (initial atomic ratio used to ...)	14 230Th/232Th(0) (minimum initial atomic ratio ...)	15 230Th/232Th(0) (maximum initial atomic ratio ...)	16 Age dated [ka] (corrected for initial detrita...)	17 Year analysis [a AD] (C.E. year radiogenic isotopes...)	18 Cal age [ka BP] (Age before 1950 C.E., Monte C...)	19 Cal age e + [ka BP] (95% confidence intervals for ...)	20 Cal age e - [ka BP] (95% confidence intervals for ...)	21 234U/238U(0) (Initial (234/238), Calculated...)	22 (234U/238U(0)) e+ (95% confidence intervals for ...)	23 (234U/238U(0)) e- (95% confidence intervals for ...)	24 Cal age mean [ka BP] (OxCal 4.4 Poisson-process dep...)	25 Cal age min [ka BP] (95% confidence range, OxCal 4...)	26 Cal age max [ka BP] (95% confidence range, OxCal 4...)
an14	3.8	107	0.2	2111	0.919	0.002	0.0570	0.000649	6.985	111	70	152	5.387	2016	5.321	0.602	0.595	0.918	0.004	0.004	5.439	5.910	4.932
ao07	5.3	138	0.1	631	0.925	0.002	0.0587	0.000200	7.152	111	70	152	6.664	2016	6.598	0.243	0.246	0.923	0.004	0.004	6.578	6.807	6.354
ao06	8.5	125	0.1	393	0.911	0.002	0.0737	0.000156	9.210	111	70	152	8.822	2016	8.756	0.222	0.222	0.909	0.004	0.004	8.754	8.976	8.533
cc09	10.1	99	0.0	239	0.900	0.001	0.0876	0.000113	11.185	111	70	152	10.901	2011	10.840	0.312	0.306	0.897	0.001	0.001	10.558	10.808	10.305
an12	10.9	119	0.1	635	0.906	0.002	0.0900	0.000308	11.426	111	70	152	10.660	2016	10.594	0.328	0.336	0.903	0.004	0.004	10.926	11.140	10.707
ao05	11.5	102	0.0	144	0.921	0.002	0.0922	0.000071	11.520	111	70	152	11.345	2016	11.279	0.215	0.218	0.918	0.004	0.004	11.320	11.505	11.128
ao03	12.4	121	0.1	437	0.909	0.002	0.1012	0.000239	12.897	111	70	152	12.304	2016	12.238	0.280	0.278	0.906	0.004	0.004	12.203	12.434	11.975
an11	13.4	136	0.2	849	0.905	0.002	0.1104	0.000506	14.222	111	70	152	12.956	2016	12.890	0.488	0.481	0.901	0.004	0.004	12.979	13.255	12.706
ar05	13.7	155	0.2	677	0.907	0.002	0.1113	0.000407	14.318	111	70	152	13.296	2018	13.228	0.400	0.409	0.903	0.003	0.004	13.265	13.529	13.006
cd06	13.9	150	0.0	161	0.907	0.001	0.1093	0.000095	14.027	111	70	152	13.802	2011	13.741	0.436	0.407	0.903	0.001	0.001	13.529	13.851	13.218
cd17	14.5	125	0.1	337	0.928	0.001	0.1196	0.000218	15.074	111	70	152	14.542	2011	14.481	0.626	0.559	0.925	0.001	0.001	14.358	14.790	13.910
ar01	15.4	108	0.0	169	0.927	0.002	0.1236	0.000113	15.645	111	70	152	15.367	2018	15.299	0.207	0.206	0.923	0.004	0.004	15.284	15.471	15.092
an10	16.2	130	0.1	251	0.925	0.002	0.1301	0.000176	16.559	111	70	152	16.125	2016	16.059	0.242	0.239	0.922	0.004	0.004	16.116	16.331	15.898
ar02	16.9	108	0.0	191	0.920	0.002	0.1353	0.000140	17.379	111	70	152	17.033	2018	16.965	0.277	0.275	0.917	0.004	0.004	17.013	17.253	16.748
ar03	17.5	131	0.2	619	0.926	0.002	0.1519	0.000507	19.582	111	70	152	18.332	2018	18.264	0.533	0.529	0.923	0.004	0.004	18.213	18.658	17.785
ao02	18.2	157	0.5	1094	0.914	0.002	0.1711	0.001010	22.690	111	70	152	20.153	2016	20.087	0.933	0.938	0.909	0.004	0.004	19.456	20.129	18.823
ao01	20.4	139	0.4	928	0.923	0.002	0.1850	0.000926	24.476	111	70	152	22.194	2016	22.128	0.873	0.863	0.918	0.004	0.004	22.179	22.866	21.516
cd19	27.1	161	0.1	165	0.904	0.001	0.2286	0.000203	31.976	111	70	152	31.460	2011	31.399	0.553	0.500	0.895	0.001	0.001	31.373	31.899	30.847