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Correlation of ignimbrites using characteristic remanent magnetization and anisotropy of magnetic susceptibility, Central Andes, Bolivia

Creator:

Ort, Michael H., de Silva, Shanaka L., Jimenez C., Nestor, Jicha, Brian R., and Singer, Bradley S.

Abstract:

Large ignimbrite flare-ups provide records of profound crustal modification during batholith formation at depth. The locations of source calderas and volumes and ages of the eruptions must be determined to develop models for the tectonomagmatic processes that occur during these events. Although high-precision isotopic ages of the ignimbrites are critical,...

Resource Type:

Article

Full Text:

Table 1. Characteristic Remanent Magnetization Directions for 45 sites in Central Andean Ignimbrites
deSilvaShanakaCEOASResurgentTobaField.pdf

Creator:

de Silva, Shanaka L., Mucek, Adonara E., Gregg, Patricia M., and Pratomo, Indyo

Abstract:

Highlights: New data reveal for the first time a history of the last ∼33.7 ky of uplift of Samosir. Minimum uplift rates were high (4.9 cm/year) for the first 11.2 ky but diminished after that to <1 cm/year for the last 22.5 ky. Numerical modeling suggests that rebound of remnant...

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Department of Geology, University of Illinois - Urbana-Champaign, Champaign, IL, USA, 4 Geological Agency of