Tectonic Setting Of Faulted Tertiary Strata Associated With The Catalina Core Complex In Southern Arizona
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Tectonic Setting Of Faulted Tertiary Strata Associated With The Catalina Core Complex In Southern Arizona
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Author : William R. Dickinson
language : en
Publisher: Geological Society of America
Release Date : 1991
Tectonic Setting Of Faulted Tertiary Strata Associated With The Catalina Core Complex In Southern Arizona written by William R. Dickinson and has been published by Geological Society of America this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Science categories.
Mid-Tertiary strata exposed as tilted homoclines along the flanks of the San Pedro trough and across broad uplands north of the Catalina core complex are assigned to the following formations, each of which includes informal local members and facies: (a) Mineta Formation, mid-Oligocene redbeds including both conglomeratic fluvial and finer-grained lacustrine deposits; (b) Galiuro Volcanics, including lavas and domes, air-fall and ash-flow tuffs, and intercalated volcaniclastic strata of late Oligocene to earliest Miocene age; (c) Cloudburst Formation, also of late Oligocene and earliest Miocene age but including a sedimentary upper member of conglomeratic strata as well as a volcanic lower member correlative with part of the Galiuro Volcanics; and (d) San Manuel Formation, composed of lower Miocene alluvial fan and braidplain deposits that display contrasting clast assemblages in different areas of exposure. Generally correlative Oligocene-Miocene strata exposed south of the Catalina core complex are assigned to the Pantano Formation, which contains similar lithologic components. Less-deformed Neogene strata of post-mid-Miocene basin fill are assigned to the Quiburis Formation along the San Pedro trough, but stratigraphic equivalents elsewhere lack adequate nomenclature. High benchlands mantled by paleosols mark the highest levels of Neogene aggradation. Successive stages of subsequent erosional dissection are recorded by multiple terrace levels incised into basin fill. Key exposures of syntectonic mid-Tertiary sedimentary sequences in several local subareas reveal typical structural and stratigraphic relationships. Multiple fault blocks expose pre-Tertiary bedrock overlain by tilted mid-Tertiary strata confined to intervening half-grabens. Bounding syndepositional faults dip southwest and associated homoclines dip northeast. Fanning dips and buttress unconformities reflect progressive tilt and burial of eroding fault blocks. Dips of block-bounding faults are inversely proportional to the ages of the faults. Steeper dips for younger faults suggest either progressive erosion of successive listric faults or progressive rotation of successive planar faults. Uniformly moderate to steep dihedral angles between fault surfaces and offset homoclinal bedding imply that the faults dipped more steeply near the surface when syntectonic mid-Tertiary strata were subhorizontal. Although the inference of listric faulting best links apparent strands of the Catalina detachment system, the alternate interpretation of rotational normal faulting is compatible with local structural relationships including tilt of porphyry copper orebodies. Within the San Pedro trough, multiple homo clines of mid-Tertiary strata are exposed locally in tilt-blocks exhumed by Neogene erosion from beneath nearly flat-lying basin fill of the Quiburis Formation. Faults bounding the mid-Tertiary exposures include backtilted strands of the Catalina detachment system, somewhat younger listric or rotational normal faults, and steeper basin-range normal faults that display offsets both synthetic and antithetic to the flanks of the San Petro trough. In Cienega Gap, flanking the Tucson Basin, multiple tilt-blocks of the Pantano Formation form part of the upper plate of the Catalina detachment system. Initial construction of alluvial fans by generally westward paleoflow was followed by ponding of lacustrine environments along the foot of secondary breakaway scarps that also generated massive megabreccia deposits. In summary, syntectonic Oligocene to Miocene sedimentation succeeded a prominent pulse of polymodal mid-Tertiary volcanism and was coeval with mylonitic deformation and detachment faulting along the flank of the Catalina core complex. The headwall rupture for the detachment system migrated westward from an initial position along the range front of the Galiuro Mountains. After mid-Miocene time, accumulation and subsequent dissection of essentially undeformed basin fill was accompanied by basin-range block faulting. The most challenging structural issue is whether fault strands of the Catalina detachment system are interconnected or are disconnected rotational segments.
Structural Context Of Mid Tertiary Mineralization In The Mammoth And San Manuel Districts Southeastern Arizona
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Author : Eric R. Force
language : en
Publisher:
Release Date : 1992
Structural Context Of Mid Tertiary Mineralization In The Mammoth And San Manuel Districts Southeastern Arizona written by Eric R. Force and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Geology, Stratigraphic categories.
U S Geological Survey Bulletin
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Author :
language : en
Publisher:
Release Date : 1983
U S Geological Survey Bulletin written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with Geology categories.
Exhumation Processes
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Author : Uwe Ring
language : en
Publisher: Geological Society of London
Release Date : 1999
Exhumation Processes written by Uwe Ring and has been published by Geological Society of London this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Science categories.
Geomechanics And Geology
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Author : J.P. Turner
language : en
Publisher: Geological Society of London
Release Date : 2017-09-19
Geomechanics And Geology written by J.P. Turner and has been published by Geological Society of London this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-09-19 with Science categories.
Geomechanics investigates the origin, magnitude and deformational consequences of stresses in the crust. In recent years awareness of geomechanical processes has been heightened by societal debates on fracking, human-induced seismicity, natural geohazards and safety issues with respect to petroleum exploration drilling, carbon sequestration and radioactive waste disposal. This volume explores the common ground linking geomechanics with inter alia economic and petroleum geology, structural geology, petrophysics, seismology, geotechnics, reservoir engineering and production technology. Geomechanics is a rapidly developing field that brings together a broad range of subsurface professionals seeking to use their expertise to solve current challenges in applied and fundamental geoscience. A rich diversity of case studies herein showcase applications of geomechanics to hydrocarbon exploration and field development, natural and artificial geohazards, reservoir stimulation, contemporary tectonics and subsurface fluid flow. These papers provide a representative snapshot of the exciting state of geomechanics and establish it firmly as a flourishing subdiscipline of geology that merits broadest exposure across the academic and corporate geosciences.
Fission Track Thermochronology And Its Application To Geology
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Author : Marco G. Malusà
language : en
Publisher: Springer
Release Date : 2018-07-14
Fission Track Thermochronology And Its Application To Geology written by Marco G. Malusà and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-07-14 with Science categories.
This book is focused on the basics of applying thermochronology to geological and tectonic problems, with the emphasis on fission-track thermochronology. It is conceived for relatively new practitioners to thermochronology, as well as scientists experienced in the various methods. The book is structured in two parts. Part I is devoted to the fundamentals of the fission-track method, to its integration with other geochronologic methods, and to the basic principles of statistics for fission-track dating and sedimentology applied to detrital thermochronology. Part I also includes the historical development of the technique and thoughts on future directions. Part II is devoted to the geological interpretation of the thermochronologic record. The thermal frame of reference and the different approaches for the interpretation of fission-track data within a geological framework of both basement and detrital studies are discussed in detail. Separate chapters demonstrate the application of fission-track thermochronology from various perspectives (e.g., tectonics, petrology, stratigraphy, hydrocarbon exploration, geomorphology), with other chapters on the application to basement rocks in orogens, passive continental margins and cratonic interiors, as well as various applications of detrital thermochronology.
Structural Analysis And Chronologic Constraints On Progressive Deformation Within The Rincon Mountains Arizona
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Author : George H. Davis
language : en
Publisher: Geological Society of America
Release Date : 2023-08-28
Structural Analysis And Chronologic Constraints On Progressive Deformation Within The Rincon Mountains Arizona written by George H. Davis and has been published by Geological Society of America this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-08-28 with Science categories.
A Guide To The Geology Of Saguaro National Park
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Author : John V. Bezy
language : en
Publisher: Arizona Geological Survey
Release Date : 2005
A Guide To The Geology Of Saguaro National Park written by John V. Bezy and has been published by Arizona Geological Survey this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Geology categories.
The Third Hutton Symposium On The Origin Of Granites And Related Rocks
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Author : M. Brown
language : en
Publisher: Geological Society of America
Release Date : 1996-01-01
The Third Hutton Symposium On The Origin Of Granites And Related Rocks written by M. Brown and has been published by Geological Society of America this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996-01-01 with Science categories.
Gneiss Domes In Orogeny
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Author : Donna Whitney
language : en
Publisher: Geological Society of America
Release Date : 2004-01-01
Gneiss Domes In Orogeny written by Donna Whitney and has been published by Geological Society of America this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004-01-01 with Science categories.