Table 6_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. This 40.9 KB Excel file contains whole-rock geochemistry and Sr–Nd isotopic data for intermediate–felsic intrusions, uploaded by Jie Sun in April 2026. The data indicate an evolution from I-type to A-type granitoids in a back-arc extensional setting.

Use Cases

• Classifying granitoid types (I-type vs. A-type) based on apatite and whole-rock geochemical characteristics mentioned in the description
• Modeling magma source and crust-mantle interaction based on Sr–Nd isotopic ratios and TDM2 ages
• Reconstructing paleo-tectonic settings using geochemical discrimination diagrams implied by the data
• Investigating crystallization conditions using zircon Ti-thermometry temperature and oxygen fugacity data

Strengths

• Includes multiple analytical methods: zircon and apatite U–Pb geochronology, whole-rock geochemistry, and Sr–Nd isotopic analyses
• Provides specific numerical ranges for key parameters, such as ages (512–504 Ma), εNd(t) values (-9.7 to -6.4), and crystallization temperatures (692–826 °C)
• Released under a permissive CC-BY-4.0 license for reuse

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 (40.9 KB), indicating limited scope

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 (ca. 512–503 Ma)

Freshness

Last updated 2026-04-20 05:23:24; freshness should be verified

Geography

Dachadaban area, North Qilian Orogenic Belt