Burial dolomitization in the Lost Burro Formation (Devonian), east-central California, and the significance of late diagenetic dolomitization

Research Article| September 01, 1983 Burial dolomitization in the Lost Burro Formation (Devonian), east-central California, and the significance of late diagenetic dolomitization Donald H. Zenger Donald H. Zenger 1Geology Department, Pomona College, Claremont, California 91711 Search for other works by this author on: GSW Google Scholar Author and Article Information Donald H. Zenger 1Geology Department, Pomona College, Claremont, California 91711 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1983) 11 (9): 519–522. https://doi.org/10.1130/0091-7613(1983)11<519:BDITLB>2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Donald H. Zenger; Burial dolomitization in the Lost Burro Formation (Devonian), east-central California, and the significance of late diagenetic dolomitization. Geology 1983;; 11 (9): 519–522. doi: https://doi.org/10.1130/0091-7613(1983)11<519:BDITLB>2.0.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 Shallow subtidal and peritidal carbonates in the lower Lost Burro Formation have been pervasively dolomitized. Evidence for late diagenetic burial dolomitization consists of very coarse crystallinity, zebroid structure, healed microfractures, "local" limestone-dolomite facies relations, transection of bedding by dolomite tongues and fronts, truncated and relict stylolites, oxygen-isotope data, and a "net fabric." The latter consists of seams of replacement dolomite (concentrated along stylolites and microfractures) that enclose remnants of micrite in which are disseminated large, baroque, cross-shaped dolomite crystals. The presence of a relict net fabric in dolomite immediately across a sharp dolomite front strongly suggests that a large mass of dolomite resulted from replacement in the burial environment as contrasted with late diagenetic neomorphism of earlier dolomite, a process that may also be significant. It is proposed that Mg2+ ions were delivered by water moving along stylolites and now-healed microfractures. The significance of late diagenetic burial dolomitization in the geologic record has been underestimated. There are fewer thermodynamic and kinetic constraints for dolomitization in the burial environment. Also, it is premature to conclude that this environment is too tight to permit sufficient water circulation for dolomitization. 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.