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MACEDO , Orlando

Last name: MACEDO

First name: Orlando

2008 (v1)

Journal article

Metadata-only

Paleomagnetism, magnetic fabric, and 40Ar/39Ar dating of Pliocene and Quaternary ignimbrites in the Arequipa area, southern Peru

Paquereau-Lebti, Perrine Fornari, M. Roperch, Pierrick

40Ar/39Ar ages and paleomagnetic correlations using characteristic remanent magnetizations (ChRM) show that two main ignimbrite sheets were deposited at 4.86 ± 0.07 Ma (La Joya Ignimbrite: LJI) and at 1.63 ± 0.07 Ma (Arequipa Airport Ignimbrite: AAI) in the Arequipa area, southern Peru. The AAI is a 20–100 m-thick ignimbrite that fills in the...

Uploaded on: December 3, 2022
2006 (v1)

Journal article

Metadata-only

Counterclockwise rotation of Late Eocene – Oligocene forearc deposits in southern Peru and its significance for oroclinal bending in the Central Andes

Roperch, Pierrick Sempere, Thierry Macedo, Orlando

The results of a paleomagnetic study along the fore arc of southern Peru (1518°S) and northern Chile (1819°S) are reported from middle to late Miocene ignimbrites (7 sites), late Oligocene to early Miocene ignimbrites (72 sites), Paleogene sediments (20 sites), and Mesozoic and Paleocene volcanics and intrusions (31 sites). Comparison of...

Uploaded on: February 28, 2023