Choiyoi Group: Permian Tectonostratigraphy of Western Gondwana

Permian-aged (approximately 291.2 to 273.1 Ma) geological data from the Choiyoi Group in Mendoza Province, Argentina. The dataset documents eight lithostratigraphic units across three sections, capturing a transition from subduction-related to intraplate-related volcanism. It includes geochemical signatures and stratigraphic organization relevant to the tectonic evolution of the western Gondwana margin.

Use Cases

• Modeling tectonic transition from subduction to intraplate settings based on geochemical signatures.
• Correlating lithostratigraphic units across the Cordillera Frontal and Precordillera.
• Dating volcanic events and sedimentary sequences using the provided radiometric ages.
• Analyzing the geochemical evolution of magmas from basaltic-andesitic to dacitic-rhyolitic compositions.

Strengths

• Includes specific radiometric dates (291.2 Ma, 276.4 Ma, 273.1 Ma) for key stratigraphic sections.
• Documents a clear tectonic transition evidenced by distinct geochemical signatures.
• Covers a detailed stratigraphic framework of eight lithostratigraphic units.

Limitations

• Column names and a precise row count are not provided, limiting understanding of the data structure.
• The primary data file is a DOCX document, which may require extraction for quantitative analysis.
• Spatial coverage is described regionally but specific coordinate data is not detailed.

Provenance

Source

Leonardo Strazzere

Collection Method

Likely field-based geological mapping and geochemical laboratory analysis.

Time Range

Permian, approximately 291.2 to 273.1 million years ago.

Freshness

Last updated 2026-03-23.

Geography

Cordillera Frontal and Precordillera of Mendoza Province, Argentina (32°–33° S).