Table 2_Petrogenesis and tectonic implications of I-type and A-type granitoids in the Dach

512–504 Ma zircon and apatite U-Pb ages record a Late Cambrian magmatic pulse in the Dachadaban area. The dataset contains whole-rock geochemistry and Sr-Nd isotopic analyses for intermediate-felsic intrusions, indicating magma derived from Paleoproterozoic crust with mantle input. This 27.5 KB Excel file was authored by Jie Sun and last updated on 2026-04-20.

Use Cases

• Classifying granitoid types (I-type vs. A-type) based on apatite and whole-rock geochemical characteristics.
• Modeling magma source and evolution based on Sr-Nd isotopic ratios and trace element enrichment/depletion patterns.
• Reconstructing tectonic settings using geochemical discrimination diagrams mentioned in the description.
• Investigating crystallization conditions using 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 precise temporal constraint with ages ranging from 512 to 504 Ma.
• Contains specific geochemical indicators 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 (27.5 KB), indicating limited scope.

Provenance

Source

figshare, authored by Jie Sun.

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 05:23:27; freshness should be verified.

Geography

Dachadaban area, North Qilian Orogenic Belt, China.