Geochemical and Geochronological Data for Granitoids in the North Qilian Orogenic Belt

21.9 KB of geochemical and isotopic data for intermediate–felsic intrusions in the Dachadaban area. The dataset, authored by Jie Sun and last updated in April 2026, includes zircon and apatite U–Pb ages, whole-rock geochemistry, and Sr–Nd isotopic analyses. These data record a Late Cambrian (512–504 Ma) magmatic pulse and support interpretations of tectonic evolution.

Use Cases

• Classifying granitoid types (I-type vs. A-type) based on apatite and whole-rock geochemical characteristics.
• Modeling magma source and crust-mantle interaction based on Sr–Nd isotopic ratios and T_DM2 ages.
• Reconstructing paleo-tectonic settings using geochemical discrimination diagrams mentioned in the description.
• Analyzing crystallization conditions and magmatic evolution based on zircon Ti-thermometry and oxygen fugacity data.

Strengths

• Includes multiple analytical methods: zircon and apatite U–Pb geochronology, whole-rock geochemistry, and Sr–Nd isotopic analyses.
• Provides a specific temporal constraint for the magmatic event (512–504 Ma).
• Contains quantitative data for key petrogenetic indicators, such as crystallization temperatures (692–826 °C) and mantle input estimates (20–30%).

Limitations

• Row count is unknown, which may limit suitability assessment.
• Column-level documentation is absent; field semantics must be inferred after download.
• The dataset is very small (21.9 KB), indicating a limited scope of samples or variables.

Provenance

Source

figshare, authored by Jie Sun.

Collection Method

Data were gathered from zircon and apatite U–Pb geochronology, whole-rock geochemistry, and Sr–Nd isotopic analyses conducted on rock samples.

Time Range

Late Cambrian (512–504 Ma).

Freshness

Last updated 2026-04-20 05:23:26; freshness should be verified.

Geography

Dachadaban area, North Qilian Orogenic Belt.