Zircon U-Pb Geochronology and Trace/Rare Earth Element Geochemistry from the Cordillera Blanca batholith and Huayllapa Pluton, Peruvian Andes

Grambling, Tyler A; ORCID: 0000-0001-8898-8794
Jessup, Micah J; ORCID: 0000-0002-0406-7873
Newell, Dennis L; ORCID: 0000-0001-9628-739X
Grambling, Nadine L; ORCID: 0000-0002-1658-6224
Hiett, Coleman D; ORCID: 0000-0002-5503-8044
This collection presents paired U-Pb and Trace/Rare Earth Element geochemistry from zircons from four samples traversing the N - S exposures of the Cordillera Blanca batholith and from two samples of a previously unnamed pluton near the village of Huayllapa, Lima, Peru (the Huayllapa Pluton). Samples from the Cordillera Blanca batholith are granodiorite, specifically leucogranodiorite. Samples from the Huayllapa pluton are granodiorite and tonalite. Geochronology data in this collection include zircon U concentrations, 206Pb/204Pb ratios, U/Th ratios, 206Pb/207Pb ratios, 207Pb/235U ratios, 206Pb/238U ratios, percent error on isotope ratios, error correlation coefficients, 206Pb/238U dates, 207Pb/235U dates, 206Pb/207Pb dates, and associated percent errors, and 2-sigma errors on 206Pb/238U dates. Based on the age of the samples (<30 Ma), we recommend using 206Pb/238U dates and 2 sigma errors. Trace and rare earth chemistry reported in this collection include concentrations, in parts per million, for La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Y, Ho, Er, Tm, Yb, Lu, Hf, P, Th, U, and Nb. This data was collected to explore temporal and genetic connections between magmas in the Cordillera Blanca and the Cordillera Huayhuash, as well as to assess the origin of zircon date overdispersion in individual samples of the Cordillera Blanca batholith and implications of magmatism for the geodynamic evolution of the region. This dataset is intended to compliment a manuscript submitted for publication in Geosphere.
How to cite this dataset:
Grambling, T. A., Jessup, M. J., Newell, D. L., Grambling, N. L., Hiett, C. D., 2024. Zircon U-Pb Geochronology and Trace/Rare Earth Element Geochemistry from the Cordillera Blanca batholith and Huayllapa Pluton, Peruvian Andes, Version 1.0. Interdisciplinary Earth Data Alliance (IEDA). https://doi.org/10.26022/IEDA/112755. Accessed 2024-05-25.
DOI Creation Date:
Grambling, T.A., Jessup, M.J., Newell, D.L., Grambling, N.L., Hiett, C.D., (in review), "Unraveling Oligocene to Miocene intrusion in the high Andes: Contrasting magmatic conditions preceding synconvergent extension above the Peruvian flat slab." submitted to Geosphere
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International [CC-BY-NC-SA-4.0]
Funding source(s):
National Science Foundation: 1623034
National Science Foundation: 1649254
Sigma Xi Grant-in-Aid of Research #G2018031595487456
Geological Society of America Graduate Student Research Grant
Coverage Scope: Regional (Continents, Oceans)
Geographic Location: Peru, Andes, Peruvian Andes, Cordillera Blanca, Cordillera Huayhaush, Huayllapa
User Contributed Keyword(s):
zircon, U-Pb, TREE, trace elements, rare earth elements, batholith, pluton, Miocene, Oligocene, geochronology, petrochronology, granite, granodiorite, tonalite
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