/* DATA DESCRIPTION: Citation: 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): Raw X-ray fluorescence core scanning (XRF-CS) data of a sediment core from Lake Tepetiltic (Nayarit, Mexico) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.990170 Abstract: Raw X-ray fluorescence core scanning (XRF-CS) data of sediment core LTp22-1 retrieved from Lake Tepetiltic in April 2022. Scans were performed with a 5 mm step size and 30 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: 21.277661 * LONGITUDE: -104.690167 DATE/TIME START: 2022-04-08T00:00:00 * DATE/TIME END: 2022-04-08T00:00:00 MINIMUM DEPTH, sediment/rock: 0.000 m * MAXIMUM DEPTH, sediment/rock: 0.200 m Event(s): LTp22-1 * LATITUDE: 21.277661 * LONGITUDE: -104.690167 * DATE/TIME: 2022-04-08T00:00:00 * ELEVATION: 1430.0 m * LOCATION: Lake Tepetiltic, Nayarit, Mexico * METHOD/DEVICE: Sediment corer, UWITEC Parameter(s): DEPTH, sediment/rock [m] (Depth sed) * GEOCODE * PI: Rantala, Marttiina V (https://orcid.org/0000-0002-3231-5926, marttiina.rantala@gmail.com) Age [a AD/CE] (Age) * PI: Rantala, Marttiina V (https://orcid.org/0000-0002-3231-5926, marttiina.rantala@gmail.com) * METHOD/DEVICE: Bayesian age model, according to Aquino-López et al. (2018) (URI: https://doi.org/10.1007/s13253-018-0328-7) * COMMENT: Plum version 0.5.1 by Aquino-López et al. (2018, doi:10.1007/s13253-018-0328-7). AGE [ka BP] (Age) * GEOCODE * PI: Rantala, Marttiina V (https://orcid.org/0000-0002-3231-5926, marttiina.rantala@gmail.com) Silicon [cps] (Si) * PI: Rantala, Marttiina V (https://orcid.org/0000-0002-3231-5926, marttiina.rantala@gmail.com) * METHOD/DEVICE: X-ray fluorescence core scanner (XRF), Cox Analytical Systems, Itrax Potassium [cps] (K) * PI: Rantala, Marttiina V (https://orcid.org/0000-0002-3231-5926, marttiina.rantala@gmail.com) * METHOD/DEVICE: X-ray fluorescence core scanner (XRF), Cox Analytical Systems, Itrax Calcium [cps] (Ca) * PI: Rantala, Marttiina V (https://orcid.org/0000-0002-3231-5926, marttiina.rantala@gmail.com) * METHOD/DEVICE: X-ray fluorescence core scanner (XRF), Cox Analytical Systems, Itrax Titanium [cps] (Ti) * PI: Rantala, Marttiina V (https://orcid.org/0000-0002-3231-5926, marttiina.rantala@gmail.com) * METHOD/DEVICE: X-ray fluorescence core scanner (XRF), Cox Analytical Systems, Itrax Vanadium [cps] (V) * PI: Rantala, Marttiina V (https://orcid.org/0000-0002-3231-5926, marttiina.rantala@gmail.com) * METHOD/DEVICE: X-ray fluorescence core scanner (XRF), Cox Analytical Systems, Itrax Chromium [cps] (Cr) * PI: Rantala, Marttiina V (https://orcid.org/0000-0002-3231-5926, marttiina.rantala@gmail.com) * METHOD/DEVICE: X-ray fluorescence core scanner (XRF), Cox Analytical Systems, Itrax Manganese [cps] (Mn) * PI: Rantala, Marttiina V (https://orcid.org/0000-0002-3231-5926, marttiina.rantala@gmail.com) * METHOD/DEVICE: X-ray fluorescence core scanner (XRF), Cox Analytical Systems, Itrax Iron [cps] (Fe) * PI: Rantala, Marttiina V (https://orcid.org/0000-0002-3231-5926, marttiina.rantala@gmail.com) * METHOD/DEVICE: X-ray fluorescence core scanner (XRF), Cox Analytical Systems, Itrax Nickel [cps] (Ni) * PI: Rantala, Marttiina V (https://orcid.org/0000-0002-3231-5926, marttiina.rantala@gmail.com) * METHOD/DEVICE: X-ray fluorescence core scanner (XRF), Cox Analytical Systems, Itrax Copper [cps] (Cu) * PI: Rantala, Marttiina V (https://orcid.org/0000-0002-3231-5926, marttiina.rantala@gmail.com) * METHOD/DEVICE: X-ray fluorescence core scanner (XRF), Cox Analytical Systems, Itrax Zinc [cps] (Zn) * PI: Rantala, Marttiina V (https://orcid.org/0000-0002-3231-5926, marttiina.rantala@gmail.com) * METHOD/DEVICE: X-ray fluorescence core scanner (XRF), Cox Analytical Systems, Itrax Germanium [cps] (Ge) * PI: Rantala, Marttiina V (https://orcid.org/0000-0002-3231-5926, marttiina.rantala@gmail.com) * METHOD/DEVICE: X-ray fluorescence core scanner (XRF), Cox Analytical Systems, Itrax Strontium [cps] (Sr) * PI: Rantala, Marttiina V (https://orcid.org/0000-0002-3231-5926, marttiina.rantala@gmail.com) * METHOD/DEVICE: X-ray fluorescence core scanner (XRF), Cox Analytical Systems, Itrax Zirconium [cps] (Zr) * PI: Rantala, Marttiina V (https://orcid.org/0000-0002-3231-5926, marttiina.rantala@gmail.com) * METHOD/DEVICE: X-ray fluorescence core scanner (XRF), Cox Analytical Systems, Itrax Cadmium [cps] (Cd) * PI: Rantala, Marttiina V (https://orcid.org/0000-0002-3231-5926, marttiina.rantala@gmail.com) * METHOD/DEVICE: X-ray fluorescence core scanner (XRF), Cox Analytical Systems, Itrax Cerium [cps] (Ce) * PI: Rantala, Marttiina V (https://orcid.org/0000-0002-3231-5926, marttiina.rantala@gmail.com) * METHOD/DEVICE: X-ray fluorescence core scanner (XRF), Cox Analytical Systems, Itrax Tantalum [cps] (Ta) * PI: Rantala, Marttiina V (https://orcid.org/0000-0002-3231-5926, marttiina.rantala@gmail.com) * METHOD/DEVICE: X-ray fluorescence core scanner (XRF), Cox Analytical Systems, Itrax Scattering ratio, incoherent/coherent (icoh/coh scat) * PI: Rantala, Marttiina V (https://orcid.org/0000-0002-3231-5926, marttiina.rantala@gmail.com) * METHOD/DEVICE: X-ray fluorescence core scanner (XRF), Cox Analytical Systems, Itrax License: Creative Commons Attribution 4.0 International (CC-BY-4.0) (URI: https://creativecommons.org/licenses/by/4.0/) Status: Curation Level: Enhanced curation (URI: https://wiki.pangaea.de/wiki/Curation_levels) Size: 779 data points */ Depth sed [m] Age [a AD/CE] Age [ka BP] Si [cps] K [cps] Ca [cps] Ti [cps] V [cps] Cr [cps] Mn [cps] Fe [cps] Ni [cps] Cu [cps] Zn [cps] Ge [cps] Sr [cps] Zr [cps] Cd [cps] Ce [cps] Ta [cps] icoh/coh scat 0.000 2022.2 -0.07220 55 277 1344 2313 40 181 857 67900 924 539 315 228 1025 870 49 75 1703 9.99 0.005 2020.5 -0.07050 76 90 1490 2643 76 292 841 71482 1047 601 277 743 802 1149 71 78 1859 11.87 0.010 2018.8 -0.06880 99 547 1237 2285 59 212 756 64501 950 443 248 460 1047 893 60 88 1820 11.04 0.015 2016.8 -0.06680 84 168 1438 2639 80 188 844 68508 915 581 192 436 896 1035 38 164 1791 11.01 0.020 2014.9 -0.06490 92 0 1364 2479 153 222 840 69667 994 625 164 413 915 1069 38 39 1754 11.03 0.025 2013.4 -0.06340 109 225 1328 2178 76 222 807 62855 994 565 231 504 674 853 53 73 1781 10.78 0.030 2012.0 -0.06200 32 353 1165 1955 77 242 821 59191 994 602 142 503 736 811 59 96 1763 11.02 0.035 2010.5 -0.06050 61 606 1156 1885 82 166 822 56983 1043 719 132 650 784 722 4 86 1773 10.99 0.040 2009.0 -0.05900 12 238 1108 1601 53 304 752 55337 1093 505 151 702 473 592 44 0 2006 11.73 0.045 2007.1 -0.05710 84 480 1118 1680 41 274 823 55056 955 658 155 402 647 679 58 56 1633 11.06 0.050 2005.3 -0.05530 20 126 1158 1670 13 234 774 52121 1138 587 209 97 486 585 56 37 1808 11.22 0.055 2003.3 -0.05330 8 390 1035 1665 74 192 758 50953 946 625 53 477 697 814 37 58 1681 11.51 0.060 2001.4 -0.05140 50 0 1122 1546 32 216 736 50920 993 488 0 341 758 608 39 0 1860 10.92 0.065 1999.6 -0.04960 25 161 1052 1577 90 221 647 50125 1105 615 164 307 503 607 66 33 1587 11.35 0.070 1997.9 -0.04790 50 11 1158 1887 64 249 691 52474 955 624 210 459 995 429 52 39 1691 11.41 0.075 1995.8 -0.04580 54 219 1114 2267 154 152 766 56736 1049 556 101 486 738 566 59 112 1614 10.79 0.080 1993.8 -0.04380 92 452 1168 2209 117 166 811 58982 936 660 196 294 854 891 67 102 1576 10.73 0.085 1990.6 -0.04060 43 407 1119 2191 133 208 757 62394 903 509 84 492 749 732 39 44 1587 11.06 0.090 1987.4 -0.03740 25 342 1368 2316 122 212 886 65509 964 669 164 149 909 959 44 74 1529 11.23 0.095 1983.3 -0.03330 51 173 1278 2337 44 266 808 63986 900 556 199 242 1056 841 47 74 1614 10.24 0.100 1979.1 -0.02910 27 488 1351 2254 58 321 801 64450 998 579 205 405 848 870 56 35 1425 10.65 0.105 1975.7 -0.02570 131 387 1270 2401 65 252 820 65715 925 477 128 225 824 1050 34 43 1607 11.16 0.110 1972.3 -0.02230 119 201 1187 2149 100 188 777 60641 861 626 208 349 941 866 51 97 1460 10.52 0.115 1969.2 -0.01920 32 409 1322 2426 104 185 760 71779 863 418 178 343 1094 1039 34 116 1585 11.11 0.120 1966.1 -0.01610 92 399 1368 2642 129 239 916 74456 1004 592 301 408 948 1159 57 99 1498 10.59 0.125 1961.7 -0.01170 95 406 1474 2680 121 232 839 70267 936 620 164 314 950 974 31 68 1688 11.12 0.130 1957.2 -0.00720 103 254 1541 2845 142 271 890 75370 932 515 246 388 1028 968 57 28 1757 10.52 0.135 1950.4 -0.00040 67 347 1390 2913 78 263 840 71546 892 600 241 417 860 1052 41 113 1475 10.72 0.140 1943.5 0.00650 87 512 1520 2891 172 225 904 73814 915 620 175 348 983 1030 5 70 1545 10.53 0.145 1936.4 0.01360 116 507 1607 3045 75 226 972 78155 947 668 364 697 1069 1165 61 59 1632 11.39 0.150 1929.3 0.02070 130 402 1683 3107 143 264 927 80843 944 626 325 605 1393 1055 38 28 1585 10.68 0.155 1922.6 0.02740 120 390 1702 3332 158 243 1008 84087 948 612 355 634 1216 1085 28 97 1573 11.13 0.160 1915.9 0.03410 112 361 1626 3343 107 250 928 82637 987 596 442 474 973 1154 56 16 1675 10.60 0.165 1909.7 0.04030 137 573 1670 3117 78 279 949 79915 1037 649 308 398 1105 1243 25 72 1598 10.52 0.170 1903.5 0.04650 78 242 1654 2871 212 298 873 76263 946 680 335 580 1149 1127 39 70 1399 10.88 0.175 1897.6 0.05240 115 360 1463 2919 203 223 791 75084 879 525 140 536 944 998 36 74 1548 10.17 0.180 1891.7 0.05830 121 156 1671 3075 98 316 806 76724 981 558 229 513 1103 908 46 11 1603 10.50 0.185 1885.5 0.06455 125 550 1666 3185 203 268 848 79162 878 645 322 500 1048 1129 18 6 1352 10.65 0.190 1879.2 0.07080 130 137 1666 2959 152 312 792 77218 922 592 173 321 1118 972 50 0 1628 10.61 0.195 1873.0 0.07705 130 315 1657 3101 104 269 853 79244 954 621 297 498 1187 1148 28 10 1468 10.40 0.200 1866.7 0.08330 132 336 1653 3351 100 256 864 82129 974 510 415 487 1080 1305 25 95 1572 11.04