Actualistic sandstone petrofacies: Discriminating modern and ancient source rocks

Abstract

Research Article| August 01, 1990 Actualistic sandstone petrofacies: Discriminating modern and ancient source rocks Raymond V. Ingersoll Raymond V. Ingersoll 1Department of Earth and Space Sciences, University of California, Los Angeles, California 90024-1567 Search for other works by this author on: GSW Google Scholar Author and Article Information Raymond V. Ingersoll 1Department of Earth and Space Sciences, University of California, Los Angeles, California 90024-1567 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1990) 18 (8): 733–736. https://doi.org/10.1130/0091-7613(1990)018<0733:ASPDMA>2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Raymond V. Ingersoll; Actualistic sandstone petrofacies: Discriminating modern and ancient source rocks. Geology 1990;; 18 (8): 733–736. doi: https://doi.org/10.1130/0091-7613(1990)018<0733:ASPDMA>2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Actualistic models relating plate-tectonic setting to sedimentary basins and provenance successfully predict modal compositions of sand and sandstone at the scale of continents and ocean basins (third-order models). Second-order models may be used to identify source regions within a given tectonic setting, such as source terranes within the Rio Grande rift of New Mexico. First-order models relate the composition of modern alluvial sand directly to specific source rocks (e.g., granite).Petrographic data from locally derived sand of known provenance may be used to statistically discriminate compositions according to their source rocks, thus defining actualistic petrofacies. Ancient petrofacies may be compared to the actualistic petrofacies, in order to better constrain provenance and paleotectonic reconstructions. This approach may be applied at first-, second-, or third-order scales. At first- and second-order scales, stepwise discriminant analysis reveals the Tertiary provenance history of the Rio Grande rift of north-central New Mexico by comparing Tertiary petrofacies with modern petrofacies of known provenance. Application of this technique provides needed objectivity in source-rock and paleotectonic reconstructions. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.