Falkowski, Sarah; Ehlers, Todd A (2023): Single-grain apatite (U-Th)/He (AHe) analytical results and sample ages (Table S1) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.955354, In: Falkowski, S; Ehlers, TA (2023): Low-temperature thermochronometric data (AHe, AFT, ZHe, ZFT) from three bedrock sample transects across the eastern Central Andes, southern Peru [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.955437
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Published: 2023-02-07 • DOI registered: 2023-09-29
Abstract:
This dataset (Table S1) contains a total of 163 single-grain analytical data of apatite (U-Th)/He (AHe) measurements from 49 of the newly collected bedrock samples. Furthermore, the data table contains weighted mean AHe ages for reset samples. Data were acquired between 2018 and 2020 at the University of Tübingen, Germany, using standard heavy mineral separation techniques to obtain apatite concentrates, a Leica binocular for apatite selection, a Patterson helium line for single-grain helium measurements, and a Thermo Fisher Scientific iCAP Qc and Agilent 7900 ICP-MS for uranium, thorium, and samarium measurements via isotope dilution inductively coupled plasma mass spectrometry.
Keyword(s):
Related to:
Falkowski, Sarah; Ehlers, Todd A; McQuarrie, Nadine; Glover, Chloë O; Perez, Nicholas D; Buford Parks, Victoria M (2023): Exhumation and incision of the eastern Central Andes, southern Peru: Low-temperature thermochronology observations. Earth and Planetary Science Letters, 620, 118299, https://doi.org/10.1016/j.epsl.2023.118299
Coverage:
Median Latitude: -13.635156 * Median Longitude: -70.955230 * South-bound Latitude: -14.815220 * West-bound Longitude: -71.884360 * North-bound Latitude: -12.898500 * East-bound Longitude: -70.243860
Date/Time Start: 2018-07-01T00:00:00 * Date/Time End: 2018-07-20T00:00:00
Minimum Elevation: 359.0 m * Maximum Elevation: 5042.0 m
Event(s):
06JBPR10 * Latitude: -13.396730 * Longitude: -70.899980 * Elevation: 1097.0 m * Location: eastern Central Andes, South Peru * Method/Device: Rock sample (ROCK) * Comment: 2006
Comment:
Note: All errors are 1 sigma (1s). Mass, Rs, and Ft errors for samples P04x-31, 06JBPR10, 06JBPR17, and 06JBPR19 are estimated from the average relative errors of the other samples, as those samples' grain geometries and masses were obtained differently (see below) and uncertainty estimates are not available.
a: Effective uranium eU=[U]+0.235*[Th], based on grain masses determined after Glotzbach et al. (2019, https://doi.org/10.1016/j.chemgeo.2018.12.032) (except samples P04x-31, 06JBPR10, 06JBPR17, 06JBPR19, where the mass was determined via Ca-calibration).
b: Mass determined after Glotzbach et al. (2019, https://doi.org/10.1016/j.chemgeo.2018.12.032) and using an assumed density of 3.2±0.1 g/cm3 (except samples P04x-31, 06JBPR10, 06JBPR17, 06JBPR19, where the mass was determined via Ca-calibration).
c: Sphere-equivalent radius determined after Glotzbach et al. (2019, https://doi.org/10.1016/j.chemgeo.2018.12.032) (except samples P04x-31, 06JBPR10, 06JBPR17, 06JBPR19, where the grain geometries were estimated from length and width measurements).
d: Alpha-ejection correction factor determined after Glotzbach et al. (2019, https://doi.org/10.1016/j.chemgeo.2018.12.032) (except samples P04x-31, 06JBPR10, 06JBPR17, 06JBPR19, where the grain geometries were estimated from length and width measurements).
e: Weighted mean apatite (U-Th)/He age with weighted standard deviation is calculated for reset samples.
f: Interpreted AHe sample age refers to samples with only one single-grain age, which is cautiously used as sample age.
g: A 24% error was used as the interpreted age's uncertainty, which is the average relative error of the weighted mean AHe ages.
h: Single-grain age excluded as outlier from the sample age calculation. For an explanation, see Comment column.
Parameter(s):
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
3542 data points
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