{"title":"Controls on the Genesis of a Giant Sand Injection Complex. Insights on the Palaeogene Evolution of the Stress of Northern and Central California","authors":"M. Vigorito, A. Grippa, R. H. T. Callow","doi":"10.1144/jgs2024-001","DOIUrl":null,"url":null,"abstract":"\n Giant sand injection complexes and localized swarms of sandstone intrusions are common in Upper Cretaceous to Miocene sedimentary successions of the Central and Northern California within a distance of less than 100 km from the Pacific margin of the North America Plate. One of the best preserved and extensively exposed injection complexes is the late Eocene Tumey Giant Injection Complex. The emplacement of sand injectites was driven by overpressure generated by thermal diagenesis of biosiliceous and smectite-rich mudstone host-rocks. The orientation and size distribution of sandstone intrusions was controlled by stress in which\n \n \n σ\n \n \n 1\n and\n \n \n σ\n \n \n 3\n were horizontal and, respectively, parallel and perpendicular to the present trace of the San Andreas Fault, and\n \n \n σ\n \n \n 2\n was vertical. A strike-slip tectonic regime is inferred. Our analysis documents margin orthogonal extension and draws support for a late Eocene phase of increase of strain, and possibly active slip, along a syn-subduction strike-slip fault zone. Comparison with other injection complexes in the region indicates that the near-field maximum principal stress rotated through time, from normal to parallel with respect to the plate margin, probably in relation to variations of the relative motion vector of the converging plates.\n","PeriodicalId":2,"journal":{"name":"ACS Applied Bio Materials","volume":"13 12","pages":""},"PeriodicalIF":4.6000,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Applied Bio Materials","FirstCategoryId":"89","ListUrlMain":"https://doi.org/10.1144/jgs2024-001","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, BIOMATERIALS","Score":null,"Total":0}
引用次数: 0
Abstract
Giant sand injection complexes and localized swarms of sandstone intrusions are common in Upper Cretaceous to Miocene sedimentary successions of the Central and Northern California within a distance of less than 100 km from the Pacific margin of the North America Plate. One of the best preserved and extensively exposed injection complexes is the late Eocene Tumey Giant Injection Complex. The emplacement of sand injectites was driven by overpressure generated by thermal diagenesis of biosiliceous and smectite-rich mudstone host-rocks. The orientation and size distribution of sandstone intrusions was controlled by stress in which
σ
1
and
σ
3
were horizontal and, respectively, parallel and perpendicular to the present trace of the San Andreas Fault, and
σ
2
was vertical. A strike-slip tectonic regime is inferred. Our analysis documents margin orthogonal extension and draws support for a late Eocene phase of increase of strain, and possibly active slip, along a syn-subduction strike-slip fault zone. Comparison with other injection complexes in the region indicates that the near-field maximum principal stress rotated through time, from normal to parallel with respect to the plate margin, probably in relation to variations of the relative motion vector of the converging plates.
期刊介绍:
ACS Applied Bio Materials is an interdisciplinary journal publishing original research covering all aspects of biomaterials and biointerfaces including and beyond the traditional biosensing, biomedical and therapeutic applications.
The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrates knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important bio applications. The journal is specifically interested in work that addresses the relationship between structure and function and assesses the stability and degradation of materials under relevant environmental and biological conditions.