Citation:

PANGAEA.990165

Name: Raw X-ray fluorescence core scanning (XRF-CS) data of a sediment core from Lake Alchichica (Puebla, Mexico)
Published: 2026-06-05
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Anthropocene; biogeochemistry; Carbon accumulation; crater lake; Lake sediment; Mexico; Primary production; Tropical

Always quote citation above when using data! You can download the citation in several formats below.

Published: 2026-06-05 • DOI registered: 2026-07-04

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Abstract:

Raw X-ray fluorescence core scanning (XRF-CS) data of sediment core LAc22-1 retrieved from Lake Alchichica in April 2022. Scans were performed with a 2 mm step size and 20 seconds dwell time. The analysis yielded the ratio of Compton (incoherent) to Rayleigh (coherent) scattering (Inc/coh) that can be used as an indicator of sediment organic matter content. The measurements extend back to the late 1800s. Ages were estimated using Pb-210 dating and Bayesian age-depth modeling.

Keyword(s):

Anthropocene; biogeochemistry; Carbon accumulation; crater lake; Lake sediment; Mexico; Primary production; Tropical

Supplement to:

Rantala, Marttiina V; Israde-Alcántara, Isabel; Safaierad, Reza; Mattielli, Nadine; Tylmann, Wojciech; Smol, John P; Grooms, Christopher; Lepoint, Gilles; Francus, Pierre; Metcalfe, Sarah; Etmański, Paweł; Fagel, Nathalie (2026): Increasing lake primary production and organic carbon sequestration in tropical Mexican lakes during the past century. CATENA, 273, 110448, https://doi.org/10.1016/j.catena.2026.110448

References:

Aquino-Lopez, Marco A; Blaauw, Maarten; Christen, Andrés; Sanderson, Nicole K (2018): Bayesian Analysis of 210Pb Dating. Journal of Agricultural Biological and Environmental Statistics, 23(3), 317-333, https://doi.org/10.1007/s13253-018-0328-7

Funding:

Fonds de la Recherche Scientifique (FNRS), grant/award no. PDR T.0079.21: Holocene Mexican Crater Lakes and Climate (HolMeCl)

Coverage:

Latitude: 19.410556 * Longitude: -97.403889

Date/Time Start: 2022-04-12T00:00:00 * Date/Time End: 2022-04-12T00:00:00

Minimum DEPTH, sediment/rock: 0.000 m * Maximum DEPTH, sediment/rock: 0.150 m

Event(s):

LAc22-1 * Latitude: 19.410556 * Longitude: -97.403889 * Date/Time: 2022-04-12T00:00:00 * Elevation: 2322.0 m * Location: Lake Alchichica, Puebla, Mexico * Method/Device: Sediment corer, UWITEC

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	DEPTH, sediment/rock	Depth sed	m	Rantala, Marttiina V		Geocode
2	Age	Age	a AD/CE	Rantala, Marttiina V	Bayesian age model, according to Aquino-López et al. (2018)	Plum version 0.5.1 by Aquino-López et al. (2018, doi:10.1007/s13253-018-0328-7).
3	AGE	Age	ka BP	Rantala, Marttiina V		Geocode
4	Silicon	Si	cps	Rantala, Marttiina V	X-ray fluorescence core scanner (XRF), Cox Analytical Systems, Itrax
5	Chlorine	Cl	cps	Rantala, Marttiina V	X-ray fluorescence core scanner (XRF), Cox Analytical Systems, Itrax
6	Potassium	K	cps	Rantala, Marttiina V	X-ray fluorescence core scanner (XRF), Cox Analytical Systems, Itrax
7	Calcium	Ca	cps	Rantala, Marttiina V	X-ray fluorescence core scanner (XRF), Cox Analytical Systems, Itrax
8	Titanium	Ti	cps	Rantala, Marttiina V	X-ray fluorescence core scanner (XRF), Cox Analytical Systems, Itrax
9	Chromium	Cr	cps	Rantala, Marttiina V	X-ray fluorescence core scanner (XRF), Cox Analytical Systems, Itrax
10	Manganese	Mn	cps	Rantala, Marttiina V	X-ray fluorescence core scanner (XRF), Cox Analytical Systems, Itrax
11	Iron	Fe	cps	Rantala, Marttiina V	X-ray fluorescence core scanner (XRF), Cox Analytical Systems, Itrax
12	Nickel	Ni	cps	Rantala, Marttiina V	X-ray fluorescence core scanner (XRF), Cox Analytical Systems, Itrax
13	Copper	Cu	cps	Rantala, Marttiina V	X-ray fluorescence core scanner (XRF), Cox Analytical Systems, Itrax
14	Germanium	Ge	cps	Rantala, Marttiina V	X-ray fluorescence core scanner (XRF), Cox Analytical Systems, Itrax
15	Strontium	Sr	cps	Rantala, Marttiina V	X-ray fluorescence core scanner (XRF), Cox Analytical Systems, Itrax
16	Zirconium	Zr	cps	Rantala, Marttiina V	X-ray fluorescence core scanner (XRF), Cox Analytical Systems, Itrax
17	Tantalum	Ta	cps	Rantala, Marttiina V	X-ray fluorescence core scanner (XRF), Cox Analytical Systems, Itrax
18	Scattering ratio, incoherent/coherent	icoh/coh scat		Rantala, Marttiina V	X-ray fluorescence core scanner (XRF), Cox Analytical Systems, Itrax

License:

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

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

1216 data points

Data

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

1 Depth sed [m]	2 Age [a AD/CE]	3 Age [ka BP]	4 Si [cps]	5 Cl [cps]	6 K [cps]	7 Ca [cps]	8 Ti [cps]	9 Cr [cps]	10 Mn [cps]	11 Fe [cps]	12 Ni [cps]	13 Cu [cps]	14 Ge [cps]	15 Sr [cps]	16 Zr [cps]	17 Ta [cps]	18 icoh/coh scat
0.000	2022.30	-0.072300000	89	270	700	22706	433	229	729	23737	521	154	343	6224	427	895	8.41
0.002	2020.30	-0.070300000	99	251	712	27175	523	179	860	22855	570	230	279	7050	374	831	8.64
0.004	2018.40	-0.068400000	82	253	679	28657	622	234	799	22813	489	141	257	7664	393	881	7.86
0.006	2016.40	-0.066400000	89	318	774	30472	622	188	815	23500	520	182	376	7315	421	906	8.07
0.008	2014.50	-0.064500000	111	259	1007	33835	691	146	844	27311	479	330	210	7505	412	872	7.94
0.010	2012.60	-0.062600000	127	240	929	35093	736	153	884	26191	421	164	362	7741	462	699	8.25
0.012	2010.60	-0.060600000	102	221	974	35340	729	210	832	26756	425	175	310	7584	447	740	7.66
0.014	2008.60	-0.058600000	126	237	947	35155	672	212	899	26989	427	175	182	7444	533	739	7.73
0.016	2006.60	-0.056600000	182	232	905	30135	830	195	965	28538	461	246	108	6948	573	539	8.87
0.018	2004.70	-0.054700000	107	213	734	24665	705	203	820	23092	458	271	246	6136	385	631	8.38
0.020	2002.70	-0.052700000	89	212	735	24065	637	187	779	24649	468	278	243	6365	428	766	8.73
0.022	2000.70	-0.050700000	105	231	736	24851	703	147	739	24096	396	255	220	6367	488	730	8.53
0.024	1998.80	-0.048800000	131	226	707	26377	694	181	741	24569	477	182	312	6679	544	796	8.55
0.026	1996.90	-0.046900000	122	269	619	25616	685	196	716	22807	577	266	425	6648	488	786	8.55
0.028	1994.90	-0.044900000	115	213	679	25901	610	174	636	22052	525	214	188	6877	447	840	8.35
0.030	1993.00	-0.043000000	95	241	651	25561	611	163	599	21107	462	182	315	7172	344	809	9.25
0.032	1991.70	-0.041700000	124	213	613	27266	684	258	557	20990	537	261	195	6895	381	755	8.95
0.034	1990.40	-0.040400000	63	218	589	27864	614	167	595	20764	504	224	347	7263	545	803	9.14
0.036	1989.10	-0.039100000	115	210	726	28655	682	183	546	21643	432	264	412	7030	355	940	9.23
0.038	1987.80	-0.037800000	85	183	697	28708	623	143	587	21475	460	94	376	7476	444	845	8.50
0.040	1986.60	-0.036600000	79	199	713	27625	623	160	649	21079	485	117	264	7322	447	820	8.32
0.042	1985.00	-0.035000000	101	244	728	25933	695	186	646	21581	478	244	315	7211	518	715	8.74
0.044	1983.50	-0.033500000	98	244	657	25644	728	137	634	22402	415	172	240	7154	736	814	9.14
0.046	1982.00	-0.032000000	111	231	732	26956	718	164	586	22370	462	212	248	7158	400	877	8.52
0.048	1980.50	-0.030500000	112	241	723	28869	684	166	537	21408	428	254	147	7726	347	752	8.52
0.050	1979.00	-0.029000000	77	229	709	28028	627	216	600	21592	464	307	178	7446	488	625	8.37
0.052	1977.50	-0.027500000	79	193	639	25517	645	174	556	21528	450	218	278	7248	628	815	9.16
0.054	1975.90	-0.025900000	83	221	622	26078	640	167	562	21055	453	277	268	7494	455	723	8.66
0.056	1974.40	-0.024400000	100	222	618	26492	696	188	610	21047	423	254	179	7636	596	797	9.03
0.058	1972.80	-0.022800000	92	208	614	26398	691	175	536	19212	471	286	365	7985	408	645	8.55
0.060	1971.30	-0.021300000	133	226	607	23980	643	155	543	18380	523	253	323	7620	453	907	8.75
0.062	1969.50	-0.019500000	99	205	626	24226	643	135	532	19394	508	306	245	7648	560	677	8.63
0.064	1967.80	-0.017800000	126	229	590	23567	650	231	544	19792	511	232	398	7335	367	808	8.72
0.066	1966.00	-0.016000000	101	211	621	24487	699	181	505	18827	485	292	370	7274	399	738	9.42
0.068	1964.30	-0.014300000	111	226	644	25377	647	198	563	20241	524	307	188	7050	466	690	9.21
0.070	1962.50	-0.012500000	103	236	688	25830	702	207	518	21147	492	206	328	7113	299	853	9.41
0.072	1961.10	-0.011100000	86	165	642	25214	649	208	553	20327	418	221	347	7036	427	682	9.83
0.074	1959.70	-0.009700000	127	204	681	26217	661	197	577	21496	481	210	98	7160	558	730	8.38
0.076	1958.30	-0.008300000	87	203	696	28604	651	195	622	23064	533	214	430	7334	365	837	8.82
0.078	1956.90	-0.006900000	103	221	748	30102	761	146	658	22989	442	261	152	7767	458	774	9.05
0.080	1955.40	-0.005400000	131	231	746	33354	674	228	594	22361	590	252	360	8302	431	743	9.15
0.082	1953.60	-0.003600000	81	194	792	33350	696	162	555	22752	396	330	225	8039	409	633	8.24
0.084	1951.80	-0.001800000	107	209	747	31939	695	224	580	21724	450	331	221	8220	371	662	8.66
0.086	1950.00	0.000000000	154	213	683	30272	701	190	598	20424	487	244	318	7855	541	834	8.08
0.088	1948.10	0.001900000	70	196	619	31141	661	192	561	20765	470	240	423	8117	398	742	8.10
0.090	1946.30	0.003700000	127	190	635	32002	644	165	528	20256	416	249	158	8476	487	706	8.72
0.092	1944.20	0.005800000	84	195	617	34732	603	141	525	19063	484	180	406	8624	509	726	8.34
0.094	1942.10	0.007900000	114	188	719	33344	557	229	499	19929	492	214	290	8390	602	674	8.79
0.096	1940.00	0.010000000	113	179	607	30422	555	172	499	17581	513	245	195	8200	418	781	8.84
0.098	1937.90	0.012100000	96	198	529	30047	492	239	516	17962	473	231	232	8245	525	830	9.02
0.100	1935.80	0.014200000	114	167	698	32837	668	183	534	21329	482	195	188	8071	597	822	9.00
0.102	1933.30	0.016700000	106	185	632	31166	568	158	552	18324	500	231	156	8043	606	898	9.02
0.104	1930.90	0.019100000	121	189	572	30005	524	123	527	16631	509	252	290	7793	405	736	8.83
0.106	1928.40	0.021600000	115	188	494	27423	522	165	527	15862	517	410	233	7782	424	769	9.06
0.108	1925.90	0.024100000	89	200	520	28984	576	171	556	16946	586	224	331	7856	482	780	8.52
0.110	1923.50	0.026500000	92	182	588	28745	538	246	506	17341	547	272	253	8132	474	702	7.80
0.112	1921.00	0.029000000	112	206	624	30244	608	182	528	18223	465	170	345	7886	467	846	9.32
0.114	1918.50	0.031500000	111	213	563	31172	588	167	496	18434	525	161	345	8220	404	876	8.70
0.116	1916.00	0.034000000	104	198	578	31735	580	168	536	17965	543	281	224	7884	342	722	9.05
0.118	1913.50	0.036500000	58	187	651	31071	593	204	483	18571	465	233	364	7930	381	791	8.54
0.120	1911.00	0.039000000	67	172	620	30586	600	196	508	18903	542	147	278	8061	294	809	9.14
0.122	1908.50	0.041500000	88	190	545	29486	586	151	573	18370	507	295	348	7644	353	851	9.18
0.124	1905.90	0.044100000	104	180	635	28394	579	253	605	18761	531	265	280	7615	377	812	8.38
0.126	1903.30	0.046700000	137	179	652	28247	619	181	623	20867	421	308	187	7669	520	769	8.83
0.128	1900.70	0.049300000	73	143	570	30076	664	169	653	20494	476	215	330	7770	360	779	8.86
0.130	1898.10	0.051900000	88	210	654	31513	485	154	550	19155	604	337	424	7803	473	643	9.39
0.132	1895.50	0.054500000	68	168	614	31461	588	183	547	19523	452	355	464	8120	553	666	8.67
0.134	1892.90	0.057100000	138	184	516	29962	639	212	609	17972	493	265	378	8120	563	854	8.36
0.136	1890.30	0.059698701	94	163	533	29644	641	222	636	18188	572	265	187	7917	436	848	8.16
0.138	1887.70	0.062296104	136	167	548	31020	585	198	579	19571	508	276	307	7943	502	650	7.92
0.140	1885.11	0.064893506	81	211	643	31302	603	203	670	21355	415	255	116	7920	603	709	8.56
0.142	1882.51	0.067490909	76	141	666	32793	643	156	543	20254	452	241	182	7892	370	775	8.50
0.144	1879.91	0.070088312	63	169	708	31763	619	161	566	21115	492	288	325	7851	545	586	8.37
0.146	1877.31	0.072685714	116	187	736	31797	614	204	604	21958	484	271	221	8107	395	807	8.31
0.148	1874.72	0.075283117	92	164	710	30262	603	162	530	21006	495	310	208	7734	440	660	8.28
0.150	1872.12	0.077880519	95	160	780	30579	592	167	563	20938	445	353	261	7654	313	608	8.57