Citation:

PANGAEA.972744 (dataset in review)

Name: High-resolution core scanning data (X-ray fluorescence and X-ray computed tomography) in dated sediment core from lake Teremendo (Michoacán, Mexico)
License: https://creativecommons.org/licenses/by/4.0/
Keywords: biogeochemistry; Carbon cycle; Diatom; isotopes; Lake sediment; Late Holocene; Mexico; primary production; Tropical

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Abstract:

This dataset comprises high-resolution biogeochemical data for a sediment sequence (LTe22-1) from lake Teremendo (Michoacán, Mexico). The data were used to explore connections between lake carbon cycling and related ecosystem processes under natural and anthropogenic environmental change over the past four centuries. The sediment core (155 cm in length) was retrieved with a Uwitec corer near the middle of the lake basin (water depth ~8 m) in April 2022. Prior to sediment sectioning, the core was analysed with Itrax X-ray fluorescence core scanning and X-ray computed tomography with 500 microns step size. The scan data are provided from the sediment surface down to the depth of 46.6 cm, covering a time period from 2022 to around 1650. Age estimates for each sediment section have been calculated based on radiolead (Pb-210) dating of the surface sediment sections and four radiocarbon (C-14) measurements. Elemental intensities have been centered log-ratio (clr) transformed and all elemental data have been min-max normalized.

Keyword(s):

biogeochemistry; Carbon cycle; Diatom; isotopes; Lake sediment; Late Holocene; Mexico; primary production; Tropical

Related to:

Rantala, Marttiina V; et al. (submitted): Anthropogenic increase in organic carbon production and burial in two tropical crater lakes from central Mexico.

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

Coverage:

Latitude: 19.806306 * Longitude: -101.455083

Date/Time Start: 2022-04-13T00:00:00 * Date/Time End: 2022-04-13T00:00:00

Minimum DEPTH, sediment/rock: 0.0000 m * Maximum DEPTH, sediment/rock: 0.4660 m

Event(s):

LTe22-1 * Latitude: 19.806306 * Longitude: -101.455083 * Date/Time: 2022-04-13T00:00:00 * Elevation: 2060.0 m * Location: Lake Teremendo, Michoacán, 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	ka BP	Rantala, Marttiina V	Age, Bayesian based model Plum on Pb-210 and C-14 data	Geocode – Plum version 0.5.1 by Aquino-López et al. (2018)
3	Age	Age	a AD/CE	Rantala, Marttiina V	Age, Bayesian based model Plum on Pb-210 and C-14 data	Plum version 0.5.1 by Aquino-López et al. (2018)
4	Silicon	Si	cps	Rantala, Marttiina V	X-ray fluorescence element scanner, Cox Ltd., ITRAX XRF core scanner	Initial elemental intensities (counts per second) clr-transformed and min-max normalized
5	Potassium	K	cps	Rantala, Marttiina V	X-ray fluorescence element scanner, Cox Ltd., ITRAX XRF core scanner	Initial elemental intensities (counts per second) clr-transformed and min-max normalized
6	Calcium	Ca	cps	Rantala, Marttiina V	X-ray fluorescence element scanner, Cox Ltd., ITRAX XRF core scanner	Initial elemental intensities (counts per second) clr-transformed and min-max normalized
7	Titanium	Ti	cps	Rantala, Marttiina V	X-ray fluorescence element scanner, Cox Ltd., ITRAX XRF core scanner	Initial elemental intensities (counts per second) clr-transformed and min-max normalized
8	Vanadium	V	cps	Rantala, Marttiina V	X-ray fluorescence element scanner, Cox Ltd., ITRAX XRF core scanner	Initial elemental intensities (counts per second) clr-transformed and min-max normalized
9	Chromium	Cr	cps	Rantala, Marttiina V	X-ray fluorescence element scanner, Cox Ltd., ITRAX XRF core scanner	Initial elemental intensities (counts per second) clr-transformed and min-max normalized
10	Manganese	Mn	cps	Rantala, Marttiina V	X-ray fluorescence element scanner, Cox Ltd., ITRAX XRF core scanner	Initial elemental intensities (counts per second) clr-transformed and min-max normalized
11	Iron	Fe	cps	Rantala, Marttiina V	X-ray fluorescence element scanner, Cox Ltd., ITRAX XRF core scanner	Initial elemental intensities (counts per second) clr-transformed and min-max normalized
12	Nickel	Ni	cps	Rantala, Marttiina V	X-ray fluorescence element scanner, Cox Ltd., ITRAX XRF core scanner	Initial elemental intensities (counts per second) clr-transformed and min-max normalized
13	Copper	Cu	cps	Rantala, Marttiina V	X-ray fluorescence element scanner, Cox Ltd., ITRAX XRF core scanner	Initial elemental intensities (counts per second) clr-transformed and min-max normalized
14	Zinc	Zn	cps	Rantala, Marttiina V	X-ray fluorescence element scanner, Cox Ltd., ITRAX XRF core scanner	Initial elemental intensities (counts per second) clr-transformed and min-max normalized
15	Strontium	Sr	cps	Rantala, Marttiina V	X-ray fluorescence element scanner, Cox Ltd., ITRAX XRF core scanner	Initial elemental intensities (counts per second) clr-transformed and min-max normalized
16	Zirconium	Zr	cps	Rantala, Marttiina V	X-ray fluorescence element scanner, Cox Ltd., ITRAX XRF core scanner	Initial elemental intensities (counts per second) clr-transformed and min-max normalized
17	Tantalum	Ta	cps	Rantala, Marttiina V	X-ray fluorescence element scanner, Cox Ltd., ITRAX XRF core scanner	Initial elemental intensities (counts per second) clr-transformed and min-max normalized
18	Incoherent/coherent ratio	icoh/coh		Rantala, Marttiina V	X-ray fluorescence element scanner, Cox Ltd., ITRAX XRF core scanner
19	Calcium/Titanium ratio	Ca/Ti		Rantala, Marttiina V	X-ray fluorescence element scanner, Cox Ltd., ITRAX XRF core scanner	Log-ratio of initial elemental intensities min-max normalized
20	Greyscale value	Grey		Rantala, Marttiina V	Computer tomography (CT), Siemens Healthineers, Somatom Definition +128	Hounsfield units

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)

Size:

16618 data points

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