A New Tectonic Model for the Contact Relationships of Mesozoic and Cenozoic Domains in the Principal Cordillera, Central Chile (33°–34°S)

In the following appendix, we present the data obtained from fieldwork, along with its subsequent analysis and modeling using the Andino3D software from LATE Andes. This appendix includes the Andino3D project with the constructed structural sections, their restoration to the undeformed stage, and the proposed tectonic model. The details of the conditions and variables used in these processes are provided in the attached Word document. Additional details of the geochronological analyses are provided in Excel tables, a brief description in a Word document, and cathodoluminescence images in PDF format, corresponding to the various detrital zircon U-Pb samples obtained for the manuscript. Finally, a short Word document is included summarizing the stratigraphic analysis, highlighting differences with respect to previous studies in the study areas The data correspond to the publication in the journal Tectonics, aimed at studying and analyzing the contact relationship between the Cenozoic and Mesozoic blocks in the Principal Cordillera of central Chile (33°S). Structural supplementary data are compiled in folder 1) Structural SD, which includes the following files: Text SD2 detailing the different files in the Structural folder. Text SD3 outlining the input parameters, angles, and variables used for the Andino3D modeling. Figure SD1 illustrates the different deformation stages of the tectonic model. Geochronological supplementary data are incorporated in folder 2) U–Pb Geochronology SD, which includes: Text SD4 detailing the different files in the Geochronology folder. Text SD5 briefly explaining the methodology and procedures applied to the U–Pb samples. Figure SD2 contains cathodoluminescence images of the analyzed zircons. Table SD1 lists all isotopic ratios, associated errors, ages, and the analytical methods used for the U–Pb samples. Table SD2 summarizes the maximum depositional ages estimated for the U–Pb samples using different approaches. Supplementary information regarding the analysis of contact relationships is provided in folder 3) Contacts SD, specifically in Text SD6, which contains a detailed discussion of the contact relationships between the Cenozoic and Mesozoic domains in the Río El Volcán and Río Maipo sections