Citation:

PANGAEA.963887

Name: Hopane isomer ratios of sediment core NGBA19
Published: 2024-04-02
License: https://creativecommons.org/licenses/by/4.0/
Keywords: 13C composition; African Humid Period; isomer ratios; lipid biomarkers; pH reconstruction

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Published: 2024-04-02 • DOI registered: 2024-05-01

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Keyword(s):

13C composition; African Humid Period; isomer ratios; lipid biomarkers; pH reconstruction

Related to:

Schaaff, Valentine; Grossi, Vincent; Makou, Matthew; Garcin, Yannick; Deschamps, Pierre; Sebag, David; Ngatcha, Benjamin Ngounou; Ménot, Guillemette (2024): Constraints on hopanes and brGDGTs as pH proxies in peat. Geochimica et Cosmochimica Acta, https://doi.org/10.1016/j.gca.2024.03.034

Funding:

Agence Nationale de la Recherche (ANR), grant/award no. ANR-18-CE01-0005: ANR TAPIOCA

Coverage:

Latitude: 7.135000 * Longitude: 13.690000

Date/Time Start: 2019-02-01T00:00:00 * Date/Time End: 2019-02-01T00:00:00

Minimum DEPTH, sediment/rock: 0.100 m * Maximum DEPTH, sediment/rock: 5.900 m

Event(s):

NGBA19 * Latitude: 7.135000 * Longitude: 13.690000 * Date/Time: 2019-02-01T00:00:00 * Elevation: 1175.0 m * Location: NGaoundaba peatland, Northeastern Cameroon * Method/Device: Core (CORE)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	DEPTH, sediment/rock	Depth sed	m	Schaaff, Valentine		Geocode
2	AGE	Age	ka BP	Schaaff, Valentine		Geocode
3	C31 alpha beta R homohopane, per unit mass total organic carbon	C31abR homohopane/TOC	µg/g	Schaaff, Valentine	Calculated according to Mackenzie et al. (1980)
4	C31 alpha beta S homohopane, per unit mass total organic carbon	C31abS homohopane/TOC	µg/g	Schaaff, Valentine	Calculated according to Mackenzie et al. (1980)
5	C31 beta beta-Hopane, per unit mass total organic carbon	C31bb Hopane/TOC	µg/g	Schaaff, Valentine	Calculated according to Mackenzie et al. (1980)
6	C30 alpha beta-Hopane, per unit mass total organic carbon	C30ab/TOC	µg/g	Schaaff, Valentine	Calculated according to Mackenzie et al. (1980)
7	C30 beta beta-Hopane, per unit mass total organic carbon	C30bb/TOC	µg/g	Schaaff, Valentine	Calculated according to Mackenzie et al. (1980)
8	C30 hopane beta beta/(beta beta+alpha beta) ratio	C30 hopane bb/(bb+ab)	µg/g	Schaaff, Valentine	Calculated according to Mackenzie et al. (1980)
9	C31 hopane beta beta/alpha beta+beta beta ratio	C31 hopane bb/ab+bb		Schaaff, Valentine	Calculated according to Mackenzie et al. (1980)
10	C31 22S/(22S+22R)	C31 22S/(22S+22R)		Schaaff, Valentine	Calculated according to Mackenzie et al. (1980)
11	pH	pH		Schaaff, Valentine	pH calibration according to Inglis et al. (2018)

License:

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

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

524 data points

Data

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

1 Depth sed [m]	2 Age [ka BP]	3 C31abR homohopane/TOC [µg/g]	4 C31abS homohopane/TOC [µg/g]	5 C31bb Hopane/TOC [µg/g]	6 C30ab/TOC [µg/g]	7 C30bb/TOC [µg/g]	8 C30 hopane bb/(bb+ab) [µg/g]	9 C31 hopane bb/ab+bb	10 C31 22S/(22S+22R)	11 pH
0.100	-0.01350	0.000000000	0.000000000	1.410821129	1.752263557	1.129094412	0.391861901	1.000000000		8.330000000
0.150	0.09775	0.868715999	0.000000000	2.530179836	1.033332965	1.035724401	0.500577905	0.744412291		6.995832160
0.200	0.23775	0.859770171	0.000000000	1.467741285	1.279572076	1.165187498	0.476606170	0.630605397		6.401760171
0.250	0.36850	1.248938078	0.000000000	1.901166368	1.409366806	1.410572367	0.500213756	0.603524867		6.260399808
0.300	0.46200	1.202521259	0.000000000	1.930371128	1.011889663	1.396551479	0.579857010	0.616162603		6.326368788
0.400	0.63450	0.669470472	0.000000000	2.488227423	1.120431529	1.616549431	0.590632326	0.787987802		7.223296325
0.500	0.78875	0.508348600	0.000000000	1.772533525	1.167389357	0.742452141	0.388750659	0.777126317		7.166599374
0.600	0.94975	0.442287674	0.000000000	1.674932334	1.217693116	1.059475934	0.465260115	0.791099804		7.239540978
0.700	1.10225	0.980636501	0.000000000	3.263305124	0.766288212	1.769244800	0.697780227	0.768932613		7.123828241
0.800	1.16850	1.066017393	0.000000000	2.010207386	0.593074881	1.027137875	0.633952468	0.653465702		6.521090967
0.900	1.23975	1.167684649	0.000000000	1.810016018		1.242589473		0.607856941		6.283013230
1.000	1.31075	0.967634892	0.000000000	2.116934435	0.631252090	1.242293686	0.663070901	0.686298219		6.692476703
1.100	1.46925	0.964794326	0.000000000	1.609029606	0.358429943	0.959419803	0.728019113	0.625151389		6.373290250
1.200	1.62350	0.872537753	0.000000000	2.343759727		1.337320833		0.728713604		6.913885011
1.250	1.69500	0.975158839	0.000000000	2.133209895	0.531490263	1.334803410	0.715216168	0.686279550		6.692379249
1.300	1.76000	0.713995299	0.000000000	1.988183329	0.366065826	1.117059378	0.753179418	0.735770503		6.950722027
1.400	1.88850	1.523466104	0.000000000	2.711635745	0.514633327	1.630381673	0.760079381	0.640276395		6.452242783
1.500	2.04900	0.565302728	0.000000000	1.822433986	0.383124905	1.111940750	0.743740414	0.763247461		7.094151749
1.525	2.18750	0.815768176	0.000000000	2.434656707	0.498308280	0.922366332	0.649245312	0.749027218		7.019922077
1.550	2.41500	0.869455047	0.000000000	2.525048127	0.603715135	0.690723348	0.533608477	0.743863828		6.992969185
1.575	2.72150	1.370433130	0.000000000	2.876472526	0.491928955	0.928652736	0.653713012	0.677310202		6.645559253
1.600	2.89700	1.563282540	0.000000000	1.581092675		0.783629417		0.502832063		5.734783366
1.700	3.09325	2.813101222	0.000000000	2.524868241		1.320024654		0.473001627		5.579068493
1.800	3.19450	2.175410890	0.000000000	1.598583511		0.760728506		0.423578665		5.321080633
1.900	3.28275	3.119774175	0.000000000	2.031451925		1.278953540		0.394362796		5.168573793
2.000	3.46300	1.702734329	0.000000000	1.526564325		0.701222488		0.472723179		5.577614993
2.025	3.68800	3.183425829	0.000000000	3.230904248	0.647112799	1.577280961	0.709083522	0.503700965		5.739319036
2.050	3.93975	5.371069704	0.000000000	4.441532833	0.759485833	1.796846155	0.702900157	0.452635559		5.472757617
2.075	4.25075	4.812264992	0.000000000	3.070844671	0.540734926	1.194766301	0.688427229	0.389547374		5.143437294
2.100	4.42775	7.523254739	0.000000000	3.252462664	0.689527288	1.633703499	0.703203275	0.301832587		4.685566106
2.200	4.55600	4.850707058	0.000000000	3.180640669	1.035892395	1.814628147	0.636595359	0.396028260		5.177267519
2.250	4.65600	5.698913819	0.000000000	3.080790444	0.583465051	1.577960729	0.730055477	0.350899114		4.941693373
2.300	4.76675	3.281953145	0.000000000	2.496256762	0.540894897	1.466142303	0.730500811	0.432012129		5.365103312
2.400	4.96475	1.661538061	0.000000000	2.925703446	0.934500938	1.733771629	0.649773059	0.637791457		6.439271407
2.600	5.47025	1.604418326	0.000000000	2.569617350	1.103927725	1.306610682	0.542041014	0.615619403		6.323533282
2.700	5.72600	2.229890590	0.000000000	2.201134443	0.891184750	1.201016702	0.574044484	0.496755136		5.703061810
2.800	5.97500	7.374274903	0.000000000	6.467365591	1.872527357	2.499569783	0.571709572	0.467239818		5.548991852
2.900	6.07525	10.941132570	2.973541129	6.264420091	0.881583531	2.820455776	0.761865432	0.310441101	0.213698229	4.730502547
3.000	6.17100	4.084541266	1.019286721	2.801656806	0.518486231	1.458242853	0.737704962	0.354394054	0.199710242	4.959936963
3.100	6.27175	8.337476821	2.054399959	7.318885839	1.412002571	3.375816736	0.705084407	0.413245098	0.197692871	5.267139413
3.200	6.40650	11.029995250	3.778065738	5.167868054	0.735580300	2.907220158	0.798072854	0.258704766	0.255135749	4.460438880
3.300	6.55325	5.397418046	3.070104125	3.512596933	0.627464792	1.823499970	0.743992732	0.293202171	0.362574088	4.640515334
3.400	6.69275	5.069511219	2.274587300	3.316638867	0.359999601	1.326515589	0.786542331	0.311107829	0.309716338	4.733982869
3.600	7.03725	7.904434232	3.790794299	5.705292128	0.950605253	2.596674683	0.732018541	0.327880541	0.324131699	4.821536424
3.700	7.21850	8.868221894	5.506389047	6.934020952	0.716670586	3.196629553	0.816862862	0.325409017	0.383063519	4.808635067
3.750	7.28600	9.029534330	4.169907218	5.436645023	0.837500468	2.821410604	0.771106635	0.291726753	0.315915427	4.632813650
3.900	7.47525	20.290225570	12.539783600	6.829768858	0.436245327	3.023026355	0.873890990	0.172208953	0.381961014	4.008930736
4.000	7.56075	13.818863040	7.522965790	5.041319331	0.504941772	2.371778515	0.824473108	0.191081038	0.352498647	4.107443017
4.100	7.68175	21.671878490	4.916508872	6.270564368	0.340006921	2.917266421	0.895616092	0.190832757	0.184911887	4.106146994
4.200	7.82375	44.420245800	31.980882610	12.101689250	0.498044274	2.671674675	0.842874311	0.136737898	0.418591757	3.823771827
4.250	7.90175	25.673153380	11.502937210	6.636318758		2.087872964		0.151471212	0.309417613	3.900679728
4.400	8.09700	38.797134820	3.519960486	7.394746405	0.574229026	1.887225700	0.766711522	0.148752212	0.083180579	3.886486545
4.500	8.23475	19.845837070	4.898143914	3.836855383		1.371508063		0.134245735	0.197952945	3.810762736
4.600	8.37200	22.600645750	7.024601713	4.724228710		1.157536111		0.137534229	0.237115377	3.827928674
4.750	8.51275	11.309614770	0.000000000	2.613912452		1.130778511		0.187733497		4.089968853
4.800	8.56350	6.019531447	0.000000000	1.598687092		0.836357792		0.209850516		4.205419694
4.900	8.66525	4.395785415	0.000000000	1.213327728		0.663060155		0.216313648		4.239157244
5.000	8.75725	5.686342066	0.000000000	2.192414012		1.022037400		0.278269056		4.562564470
5.100	8.84975	5.609804536	0.090971029	2.395281744	0.641946592	0.735970185	0.534118023	0.295857805	0.015957658	4.654377742
5.200	8.93925	2.926827505	0.000000000	1.448019472		0.784021240		0.330987456		4.837754521
5.300	9.04225	3.101112811	0.000000000	1.870364776		1.099412706		0.376219090		5.073863652
5.400	9.13975	3.200347171	0.000000000	1.666480184	0.393205227	1.270979026	0.763724944	0.342416129		4.897412194
5.500	9.23700	5.180891255	0.000000000	2.281741772		1.169934755		0.305755591		4.706044185
5.600	9.34925	5.440354524	0.000000000	2.457290365		0.140371937		0.311142170		4.734162125
5.700	9.47250	16.399295010	0.000000000	5.167308883		2.626863088		0.239597709		4.360700041
5.750	9.52300	14.229240160	0.000000000	5.243986340	0.638006969	2.729897533	0.810562631	0.269292114		4.515704838
5.800	9.56475	14.328438200	0.000000000	6.066494945	0.467248671	1.559442888	0.769452501	0.297451083		4.662694651
5.900	9.65550	10.556870500	0.000000000	4.767716150	0.443921958	2.094519283	0.825120254	0.311115481		4.734022812