Table 4_Petrogenesis and tectonic implications of I-type and A-type granitoids in the Dach

Geochemical and isotopic data for intermediate–felsic intrusions from the Dachadaban area, North Qilian Orogenic Belt. The dataset includes zircon and apatite U–Pb ages, whole-rock geochemistry, and Sr–Nd isotopic analyses for rocks dated to 512–504 Ma. It was authored by Jie Sun and last updated on 2026-04-20.

Use Cases

• Modeling magma source and crust-mantle interaction based on Sr–Nd isotopic ratios and T_DM2 ages.
• Classifying granitoid types (I-type vs. A-type) based on apatite and whole-rock geochemical characteristics.
• Reconstructing paleo-tectonic settings using geochemical discrimination diagrams mentioned in the description.
• Analyzing crystallization conditions based on zircon Ti-thermometry temperatures 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 pulse with ages ranging from 512 to 504 Ma.
• Contains quantitative geochemical ranges, such as initial 87Sr/86Sr ratios (0.7205–0.7286) and εNd(t) values (-9.7 to -6.4).

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 at 28.8 KB, indicating a limited scope of data points.

Provenance

Source

figshare

Collection Method

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 05:23:25; freshness should be verified.

Geography

Dachadaban area, North Qilian Orogenic Belt