[
    {
        "id": "authors:c6kdw-9p826",
        "collection": "authors",
        "collection_id": "c6kdw-9p826",
        "cite_using_url": "https://authors.library.caltech.edu/records/c6kdw-9p826",
        "type": "conference_item",
        "title": "Petrogenesis of Isla Tortuga and its correlation with sills in the Guaymas Basin, Gulf of California: Insights into a shared magmatic plumbing system",
        "author": [
            {
                "family_name": "Pi\u00f1a",
                "given_name": "A.",
                "orcid": "0000-0002-9755-6704",
                "clpid": "Pi\u00f1a-Adriana"
            },
            {
                "family_name": "Stock",
                "given_name": "J.",
                "orcid": "0000-0003-4816-7865",
                "clpid": "Stock-J-M"
            },
            {
                "family_name": "Hausback",
                "given_name": "B."
            },
            {
                "family_name": "Batiza",
                "given_name": "R."
            },
            {
                "family_name": "H\u00f6fig",
                "given_name": "T. W."
            },
            {
                "family_name": "Mart\u00edn-Barajas",
                "given_name": "A."
            }
        ],
        "abstract": "<p>Isla Tortuga (IT) is a volcanic island in the Guaymas Basin&nbsp;(GB), formed by extensional tectonics in the Gulf of&nbsp;California (Mexico). It records two stages of basaltic&nbsp;volcanism, with older lavas in the south and younger&nbsp;ones in the north. The most recent eruption formed a&nbsp;lava lake in the central crater [1], but radiometric ages<br>remain unknown. IODP Exp. 385 recovered four&nbsp;kilometers of core from eight GB sites, revealing sills&nbsp;intruding Quaternary sediments [2]. These sills share&nbsp;petrographic and geochemical features with IT volcanic&nbsp;rocks. This study presents a comparative analysis of the&nbsp;petrography and geochemistry of the drilled sills and IT&nbsp;volcanic units and reports new radiometric ages for two&nbsp;IT samples.</p>",
        "doi": "10.7907/c6kdw-9p826",
        "publisher": "Caltech Library",
        "publication_date": "2025-05-30"
    },
    {
        "id": "authors:vxw7d-yed88",
        "collection": "authors",
        "collection_id": "vxw7d-yed88",
        "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20230705-143633049",
        "type": "conference_item",
        "title": "Updated Isopach Map of the Tuff of San Felipe in Baja California, Mexico",
        "author": [
            {
                "family_name": "Sabbeth",
                "given_name": "L.",
                "orcid": "0000-0001-6615-7949",
                "clpid": "Sabbeth-Leah"
            },
            {
                "family_name": "Stock",
                "given_name": "J.",
                "orcid": "0000-0003-4816-7865",
                "clpid": "Stock-J-M"
            }
        ],
        "abstract": "The 12.5 Ma Tuff of San Felipe is an ignimbrite layer, often more than 10 m thick, exposed in a number of outcrops throughout Sonora and Baja California, Mexico. If we correctly calculate the volume distribution of the Tuff of San Felipe on either side of the Gulf of California, it will help us to place Baja California to where it once was aligned with Sonora before the opening of the Upper Delf\u00edn Basin at 6 Ma. The volume of the Tuff was estimated to be at least 54 cubic km by Stock et al. (JVGR, 1999), although at that point, not all outcrops of the tuff in Baja California had been discovered and none had yet been identified in Sonora. We use the presently known extent and thickness of the Tuff in Baja California, including outcrops identified farther west and south in the stable part of the Baja California peninsula (Bennett, 2009; Olguin-Villa, 2010; Skinner et al., this meeting) to update the volume estimate for the Tuff of San Felipe in Baja California. Outcrops in Sonora are still being investigated by numerous workers, and will not be included in this presentation. Using existing published maps, and GoogleEarth, we can zoom in to identify the Tuff of San Felipe in Baja California and calculate the thicknesses of the outcrops in more locations than were previously reported. With ArcGIS, we create a layer of thicknesses and will present a final distribution and isopach map of the Tuff of San Felipe in Baja California. This result is used to calculate an updated volume estimate, after correcting for geological extension that took place after 12.5 Ma in parts of the region.",
        "publisher": "Caltech Library",
        "publication_date": "2023-07-05"
    }
]