Table 1_Petrogenesis and tectonic implications of I-type and A-type granitoids in the Dach

512-504 Ma zircon and apatite U-Pb ages, whole-rock geochemistry, and Sr-Nd isotopic data for intermediate-felsic intrusions in the Dachadaban area. The dataset, created by Jie Sun and last updated in April 2026, includes measurements for metaluminous to weakly peraluminous, high-K calc-alkaline rocks with specific isotopic signatures and crystallization temperatures.

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 (e.g., back-arc extension) using tectonic discrimination diagrams supported by the geochemical data.
• Investigating crystallization conditions and magmatic evolution based on zircon Ti-thermometry and shifts in oxygen fugacity.

Strengths

• Includes multiple analytical methods: zircon and apatite U-Pb geochronology, whole-rock geochemistry, and Sr-Nd isotopic analyses.
• Provides a precise temporal constraint for the magmatic event with ages ranging from 512 to 504 Ma.
• Contains specific numerical ranges for key geochemical parameters (e.g., initial 87Sr/86Sr ratios, εNd(t) values, crystallization temperatures).

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 (16.3 KB), indicating limited scope and likely a focused, summary-level table.

Provenance

Source

Jie Sun via 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 05:23:28; freshness should be verified.

Geography

Dachadaban area, North Qilian Orogenic Belt.