Document Type

Dataset

Publication Date

3-2022

Keywords

Island arc crustal section, exhumed arc terrane, 3D arc crustal model, volcano-pluton connection, upper- to mid-crust transition

Abstract

The Cretaceous Alisitos Ocean Arc 3D Model version 1 (v1) is a publically accessible and interactive 3D arc crustal model, with geologic map overlays on Google Earth. The model provides a virtual field trip through the upper- to middle-crust transition in the exhumed 110 Ma southern Alisitos Arc, Baja California, Mexico. This region was chosen for the model as it exposes a structurally intact and minimally altered transition zone between heterogeneous volcanic upper crust through the underlying plutonic rocks (up to ~7 km deep). The model is organized into three paleo-volcanic centers, which include (from north to south): a northern fault-bounded basin, a central subaerial edifice, and a southern volcano-bounded basin. Each volcanic center is underpinned by a separate pluton, which include (from north to south): the Los Martires pluton, the La Burra pluton, and the San Fernando pluton.

This interactive model provides GPS-located outcrop information from 213 sample/site locations by linking unique file windows that provide associated field images, +/- petrography, +/- geochemistry, and +/- geochronology. To access these windows, a step-by-step guide is available in the CEDAR download page. A video summarizing this guide is also available within the 3D_Model_files.zip folder under ‘Additional Files’ on this CEDAR page (see below). A summary table of the outcrop information that is included within each window is also provided within the 3D_Model_files.zip (3D Alisitos Arc Model_outcrop summary table.xlsx).

This model is a 3D interactive tool that supports a summary paper of Busby et al. (in revision) and the associated petrogenetic story of Morris et al. (2019).

Additional files (see below)

The Cretaceous Alisitos Oceanic Arc-v1.kmz

3D Alisitos Arc Model_outcrop summary table.xlsx

how to use 3D arc model copy_r1.mov

Comments

References

Busby, C., Morris, R.A., DeBari, S.M., Medynski, S., Andrews, G.A., Schmitt, A., Brown, S. (in revision) Geology of a large intact oceanic arc crustal section with superior exposures: Cretaceous Alisitos arc, Baja California (Mexico). GSA Books.

Morris, R.A., DeBari, S.M., Busby, C., Medynski, S., Jicha, B.R. (2019) Building arc crust: Plutonic to volcanic connections in an extensional oceanic arc, the southern Alisitos arc, Baja California; Journal of Petrology, 60 (6), pp. 1195 – 1228. https://doi.org/10.1093/petrology/egz029

Subjects - Topical (LCSH)

Petrology--Mexico--Baja California (Peninsula); Geology, Structural--Mexico--Baja California (Peninsula); Geology, Stratigraphic--Cretaceous

Geographic Coverage

Baja California (Mexico : Peninsula)

Genre/Form

handbooks; geospatial data

Type

Text

Rights

Copying of this document in whole or in part is allowable only for scholarly purposes. It is understood, however, that any copying or publication of this document for commercial purposes, or for financial gain, shall not be allowed without the author’s written permission.

Language

English

Format

application/pdf

Included in

Geology Commons

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