Island arc crustal section, exhumed arc terrane, 3D arc crustal model, volcano-pluton connection, upper- to mid-crust transition
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
Morris, R.A., Medynski, S., DeBari, S.M., Busby, C. 2022, Google Earth Model of the southern Alisitos Arc crustal section, Baja California
Subjects - Topical (LCSH)
Petrology--Mexico--Baja California (Peninsula); Geology, Structural--Mexico--Baja California (Peninsula); Geology, Stratigraphic--Cretaceous
Baja California (Mexico : Peninsula)
handbooks; geospatial data
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