Geochemical And Geochronological Data For 2.47–2.45 Ga Potassic Granites

~2.47–2.45 Ga magmatic rock data from the Xuanhua complex provides evidence for early Paleoproterozoic crustal evolution in the Trans-North China Orogen. The dataset includes field, petrological, geochemical, and geochronological results for high-Sr/Y I-type and S-type garnet-bearing granites. Authored by Jianglin Zhao, this research was published on the figshare platform.

Use Cases

• Classify granite types (I-type vs. S-type) using geochemical signatures like Sr/Y and (La/Yb)N ratios.
• Model crustal source ages and magma derivation using zircon εHf(t) values and two-stage Hf model ages ranging from 2.45 to 2.95 Ga.
• Correlate regional tectonic events by analyzing zircon U-Pb dating results indicating emplacement at ~2.47–2.45 Ga and metamorphism at ~1.83 Ga.
• Investigate crustal heterogeneity by comparing geochemical affinities such as Nb-Ta depletion and SiO2/K2O content across different granite suites.

Strengths

• Geochemical data includes specific quantitative ranges for key ratios like Sr/Y (3.6–131) and (La/Yb)N (2.4–193).
• Geochronological data provides precise emplacement (~2.47–2.45 Ga) and metamorphic (~1.83 Ga) age constraints.
• Dataset distinguishes between two genetically distinct granite types with characterized source compositions.

Limitations

• Small dataset scale at 4.5 MB, suggesting limited sample size or number of analyzed rock specimens.
• Spatial coverage is restricted to the Xuanhua terrane within the North China Craton.
• Data format includes DOCX and JPG files, which may require extraction or conversion for quantitative analysis.

Provenance

Source

Research by Jianglin Zhao, published on figshare.

Collection Method

Field, petrological, geochemical, and geochronological (zircon U-Pb dating, Hf isotope) investigations.

Time Range

Rock formation: ~2.47–2.45 Ga (Paleoproterozoic). Metamorphic overprint: ~1.83 Ga.

Freshness

Last updated on 2026-04-06.

Geography

Xuanhua complex, northern segment of the Trans-North China Orogen, North China Craton.