DOCSLIB.ORG

Pull-Apart Basins at Releasing Bends of the Sinistral Late Jurassic Mojave-Sonora Fault System

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Pull-Apart Basins at Releasing Bends of the Sinistral Late Jurassic Mojave-Sonora Fault System spe393-03 page 97 Geological Society of America Special Paper 393 2005 Pull-apart basins at releasing bends of the sinistral Late Jurassic Mojave-Sonora fault system Thomas H. Anderson* Department of Geology and Planetary Science, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA Jonathan A. Nourse Geological Sciences Department, California State Polytechnic University, Pomona, California 91768, USA ABSTRACT A 200–500-km-wide belt along the southwestern margin of cratonic North America is pervaded by northwest- and east-trending faults that fl ank basins con- taining thick deposits of locally derived conglomerate and sedimentary breccia. These deposits that crop out mainly in the northern part of mainland Mexico, or southern parts of Arizona and New Mexico are unconformable at their bases, have similar Upper Jurassic and/or Lower Cretaceous stratigraphic ages, and commonly preserve volcanic components in the lower parts of upward-fi ning sections. We argue that these basins share a common structural origin, based on: (1) the presence of faults, locally preserved, that generally defi ne the basin margins, (2) similar basal units comprised of coarse conglomeratic strata derived from adjacent basement, and (3) locally preserved syntectonic relationships to bounding faults. Fault orientations, and our observation that the faults (and their associated basins) extend south to the inferred trace of the Late Jurassic Mojave-Sonora megashear, suggest that the basins formed in response to transtension associated with sinistral movement along the megashear. Northwest-striking left-lateral strike-slip faults that terminate at east-striking normal faults defi ne releasing left steps at which crustal pull-apart structures formed. These faults, plus a less-developed set of northeast-striking right-lateral faults, appear to comprise a cogenetic system that is kinematically linked with the Mojave-Sonora megashear; that is, the maximum principal stress trends east and the plane contain- ing maximum sinistral shear stress strikes northwesterly. Late Jurassic structural anisotropies imposed upon crystalline basement north- east of the Mojave-Sonora megashear controlled or strongly infl uenced the regional distribution of the pull-apart basins as well as the orientation and style of younger structures and intrusions. Most Late Jurassic faults were modifi ed during subse- quent episodes of deformation. N60°E-directed contraction during the Late Creta- ceous (Laramide) orogeny reactivated older east-striking normal faults as sinistral strike-slip faults; northwest-striking sinistral faults were reactivated as steep reverse faults. Some stratigraphically low units were thrust across basin margins as a result of inversion. Many of the pull-apart basins encompass outcrops of Late Jurassic igne- *[email protected]. Anderson, T.H., and Nourse, J.A., 2005, Pull-apart basins at releasing bends of the sinistral Late Jurassic Mojave-Sonora fault system, in Anderson, T.H., Nourse, J.A., McKee, J.W., and Steiner, M.B., eds., The Mojave-Sonora megashear hypothesis: Development, assessment, and alternatives: Geological Society of America Special Paper 393, p. 97–122. doi: 10.1130/2005.2393(03). For permission to copy, contact [email protected]. ©2005 Geological Society of America. 97 spe393-03 page 98 98 T.H. Anderson and J.A. Nourse ous rocks and/or mineralized Laramide or Tertiary plutons. Some northwesterly faults appear to have infl uenced the position of breakaway zones for early Miocene detachment faults. Despite the common and locally strong structural and magmatic overprinting, remnants of the Late Jurassic faults are recognizable. Keywords: pull-apart, Late Jurassic, Sonora, sinistral. INTRODUCTION Numerous other conglomerate bodies are linked to the Glance by virtue of similarities of texture, depositional environment, and Statement of Hypothesis and Objectives stratigraphic position. These Upper Jurassic–Lower Cretaceous conglomerates lie northeast (Chiricahua Mountains, Arizona), At its type locality near Bisbee, Arizona (Figs. 1, 2, 3; Plate 1 southeast (Mina Plomosas–Placer de Guadalupe and Valle San [on the CD-ROM accompanying this volume]), the Upper Juras- Marcos, northeastern Mexico), southwest (Imuris and Sierra El sic and Lower Cretaceous Glance Conglomerate occurs within Batamote–Sierra del Alamo, northwestern Mexico) and west an elongate, fault-bounded basin. The long sides of this crudely (McCoy, Palen, and Plomosa Mountains, southern California) of rhomb-shaped basin coincide with steep northwest-trending the Glance Conglomerate at its type locality (Figs. 1, 2; Plate 1). faults, and the basin is terminated by east-trending normal faults. All were deposited within a 200–500-km-wide region northeast 34 New Mexico 116 McCoy B asin Arizona Area of Plate 1 Comobabi Texas Basin Burro Bisbee Diablo Artesa Basin Basin Uplift Platform Area of Cananea High Hill side Faul San Chihuahua Figure 2 Batamote t Antonio Basin Tex Basin Trough as Aldama Zone M BasePlomosas o Platfo El Burro- ja m Frio ve rm Plomosasent Salado- Rive -S She o r Line Sonora no Uplift ar Peyotes Baja Califor ra L a Ba 28 m bia Platform e Fau 116 ga sh lt ea La Mula Coahuila r Island Pic Area of PlateChihuahua 1 San Mar La Mula achos nia Coahuila cos Fault Arc Basinh Island Nuevo Parras Basin Leon Tamaulipas High 0 100 200 km 24 98 Figure 1. Map of the Mojave-Sonora fault system, showing traces of major lineaments or faults with known or inferred Late Jurassic displace- ments. Regions of important Late Jurassic–Early Cretaceous uplift or subsidence are highlighted with plus pattern or gray tone, respectively. Note locations of Figure 2 and Plate 1, which detail fault patterns and pre-Cretaceous geology. Late Jurassic regional transtension is implied by linked networks of northwesterly sinistral faults and east-striking normal faults. Geesaman Fault ComobabiComobabi Dos Cabezas BasinBasin Apac he Was Mountains Comobabi Area of Tucson h Fault Figure 7 faultsystem Mojave-Sonora LateJurassic bendsofthesinistral Pull-apart basinsatreleasing Mountains BisbeeBisbee + Sierrita + + Chiricahua Mountains Empire Santa Rita Baboquivari Whetstone Dragoon Artesa Mountains Mountains Mountains Sa Duval Fault wmill Canyon Faul Mountains Swisshelm Mountains Mountains Mountains BisbeeBisbeeult rompter Fa t P ArtesaArtesa Mustang BasinBasin Tombstone Mountains Babocomari Hills Fault B Pedregoso Kino Spr isb Fault Mountains ing Fault Government Butte Canelo ee Mountains W Mule BasinBasin e Huachuca st Fau Mountains Patagonia Divide Hills Mountains nd Faul Pajarito lt t Mountains Bisbee BasinBasin Gol Abrigo Fa Gla ult Fault d Hill Fa Mountains nce Sierra La Bell Nogales Sierra ult Area of Figure 3 San Jose ota Las Avispas Fa Agua Prieta ult Sierra Sierra Sierra + Cibuta El Pinito Sierra de + Cananea La Gloria los Ajos BatamoteBatamote Sierra El Sierra Lower Cretaceous siltstone, sandstone, limestone, and shale Sierra El Guacomea (distinguished from Glance Conglomerate in Sonora) Batamote Azul Upper Jurassic-Lower Cretaceous Glance Conglomerate Imuris Sierra (includes Lower Cretaceous siltstone, sandstone, shale, Caborca Altar San and limestone members of the Bisbee Group in Arizona) BasinBasin SanSan AntonioAntonio Antonio Mojave Jurassic intrusive and volcanic rocks Santa Ana Magdalena BasinBasin Paleozoic platform or miogeoclinal strata Sonora Proterozoic crystalline basement fault with inferred Late Jurassic left-lateral displacement fault with inferred Late Jurassic normal displacement concealed or postulated traces of the Late Jurassic Megas Mojave-Sonora fault system 99 spe393-03 page hea r city or town paved highway 99 + Figure 2. Generalized geologic map of southern Arizona, showing present-day outcrops of Upper Jurassic–Lower Cretaceous sedimentary strata in relation to exposures of Jurassic arc and older rocks. Also highlighted are major faults with known or inferred Late Jurassic displacements, mountain ranges, and towns described in the text. The movement histories of most of the faults shown have been complicated by reactivation during northeast-directed Cretaceous contraction. Data in Arizona digitized from Arizona Geological Survey Map 35 (Richard et al., 2000). Geology in Sonora modifi ed from Nourse (1995, 2001). spe393-03 page 100 100 T.H. Anderson and J.A. Nourse La Negrita Peak Figure 3. Geologic map of part of southern Arizona and adjacent northern Sonora from Taliaferro (1933), Drewes (1981), González-León and Lawton (1995), and McKee et al. (this volume) that shows postulated pull-apart basins in the Mule Mountains, Dragoon Mountains, and near Tombstone. Kine- matic diagram (inset) shows inferred transtensional stress regime for Late Jurassic time and compressional stress regime during Late Cretaceous time. spe393-03 page 101 Pull-apart basins at releasing bends of the sinistral Late Jurassic Mojave-Sonora fault system 101 of the Mojave-Sonora megashear (Silver and Anderson, 1974; In many cases we cannot unequivocally prove that sedi- Anderson and Schmidt, 1983; Anderson and Silver, 1979, this mentation was synchronous with sinistral and normal fault volume), extending from southeastern California and northwest- displacements, but the pattern of faulting that we can observe ern Sonora to the Frio River line in southern Texas (Fig. 1). We (or reasonably infer) suggests that the basins are pull-aparts in propose the following hypothesis: The Glance Conglomerate the classic sense (Mann et al., 1983; Fig. 4). Throughout the and related coarse clastic sections represent
Load more

Recommended publications
  • Likely to Have Habitat Within Iras That ALLOW Road
    Item 3a - Sensitive Species National Master List By Region and Species Group Not likely to have habitat within IRAs Not likely to have Federal Likely to have habitat that DO NOT ALLOW habitat within IRAs Candidate within IRAs that DO Likely to have habitat road (re)construction that ALLOW road Forest Service Species Under NOT ALLOW road within IRAs that ALLOW but could be (re)construction but Species Scientific Name Common Name Species Group Region ESA (re)construction? road (re)construction? affected? could be affected? Bufo boreas boreas Boreal Western Toad Amphibian 1 No Yes Yes No No Plethodon vandykei idahoensis Coeur D'Alene Salamander Amphibian 1 No Yes Yes No No Rana pipiens Northern Leopard Frog Amphibian 1 No Yes Yes No No Accipiter gentilis Northern Goshawk Bird 1 No Yes Yes No No Ammodramus bairdii Baird's Sparrow Bird 1 No No Yes No No Anthus spragueii Sprague's Pipit Bird 1 No No Yes No No Centrocercus urophasianus Sage Grouse Bird 1 No Yes Yes No No Cygnus buccinator Trumpeter Swan Bird 1 No Yes Yes No No Falco peregrinus anatum American Peregrine Falcon Bird 1 No Yes Yes No No Gavia immer Common Loon Bird 1 No Yes Yes No No Histrionicus histrionicus Harlequin Duck Bird 1 No Yes Yes No No Lanius ludovicianus Loggerhead Shrike Bird 1 No Yes Yes No No Oreortyx pictus Mountain Quail Bird 1 No Yes Yes No No Otus flammeolus Flammulated Owl Bird 1 No Yes Yes No No Picoides albolarvatus White-Headed Woodpecker Bird 1 No Yes Yes No No Picoides arcticus Black-Backed Woodpecker Bird 1 No Yes Yes No No Speotyto cunicularia Burrowing
    [Show full text]
  • The Depositional Environment and Petrographic Analysis of the Lower Cretaceous Morita Formation, Bisbee Group, Southeastern Arizona and Northern Sonora, Mexico
    The depositional environment and petrographic analysis of the Lower Cretaceous Morita Formation, Bisbee Group, southeastern Arizona and northern Sonora, Mexico Item Type text; Thesis-Reproduction (electronic); maps Authors Jamison, Kermit Publisher The University of Arizona. Rights Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author. Download date 07/10/2021 12:34:21 Link to Item http://hdl.handle.net/10150/557979 THE DEPOSITIONAL ENVIRONMENT AND PETROGRAPHIC ANALYSIS OF THE LOWER CRETACEOUS MORITA FORMATION, BISBEE GROUP, SOUTHEASTERN ARIZONA AND NORTHERN SONORA, MEXICO by HERMIT JAMISON A Thesis Submitted to the Faculty of the DEPARTMENT OF GEOSCIENCES In Partial Fulfillment of the Requirements For the Degree of MASTER OF SCIENCE WITH A MAJOR IN GEOLOGY In the Graudate College THE UNIVERSITY OF ARIZONA 1 9 8 3 Call N o . BINDING INSTRUCTIONS INTERLIBRARY INSTRUCTIONS Dept. i *9 7 9 1 Author: J ttm ilO Il, K e 1983 548 Title: RUSH____________________ PERMABIND- PAMPHLET GIFT________________ _____ COLOR: M .S . POCKET FOR MAP COVERS Front Both Special Instructions - Bindery or Repair PFFFPFKirF 3 /2 2 /8 5 Other-----------------------------— . r- STATEMENT BY AUTHOR This thesis has been submitted in partial fulfill­ ment of requirements for an advanced degree at The University of Arizona and is deposited in the University Library to be made available to borrowers under rules of the Library. Brief quotations from this thesis are allowable without special permission, provided that accurate acknow­ ledgement of source is made.
    [Show full text]
  • Upper Paleozoic and Cretaceous Stratigraphy of the Hidalgo County Area, New Mexico Eugene Greenwood, F
    New Mexico Geological Society Downloaded from: http://nmgs.nmt.edu/publications/guidebooks/21 Upper Paleozoic and Cretaceous stratigraphy of the Hidalgo County area, New Mexico Eugene Greenwood, F. E. Kottlowski, and A. K. Armstrong, 1970, pp. 33-44 in: Tyrone, Big Hatchet Mountain, Florida Mountains Region, Woodward, L. A.; [ed.], New Mexico Geological Society 21st Annual Fall Field Conference Guidebook, 176 p. This is one of many related papers that were included in the 1970 NMGS Fall Field Conference Guidebook. Annual NMGS Fall Field Conference Guidebooks Every fall since 1950, the New Mexico Geological Society (NMGS) has held an annual Fall Field Conference that explores some region of New Mexico (or surrounding states). Always well attended, these conferences provide a guidebook to participants. Besides detailed road logs, the guidebooks contain many well written, edited, and peer-reviewed geoscience papers. These books have set the national standard for geologic guidebooks and are an essential geologic reference for anyone working in or around New Mexico. Free Downloads NMGS has decided to make peer-reviewed papers from our Fall Field Conference guidebooks available for free download. Non-members will have access to guidebook papers two years after publication. Members have access to all papers. This is in keeping with our mission of promoting interest, research, and cooperation regarding geology in New Mexico. However, guidebook sales represent a significant proportion of our operating budget. Therefore, only research papers are available for download. Road logs, mini-papers, maps, stratigraphic charts, and other selected content are available only in the printed guidebooks. Copyright Information Publications of the New Mexico Geological Society, printed and electronic, are protected by the copyright laws of the United States.
    [Show full text]
  • Department of the Interior U.S
    DEPARTMENT OF THE INTERIOR U.S. FISH AND WILDLIFE SERVICE REGION 2 DIVISION OF ENVIRONMENTAL CONTAMINANTS CONTAMINANTS IN BIGHORN SHEEP ON THE KOFA NATIONAL WIL DLIFE REFUGE, 2000-2001 By Carrie H. Marr, Anthony L. Velasco1, and Ron Kearns2 U.S. Fish and Wildlife Service Arizona Ecological Services Office 2321 W. Royal Palm Road, Suite 103 Phoenix, Arizona 85021 August 2004 2 ABSTRACT Soils of abandoned mines on the Kofa National Wildlife Refuge (KNWR) are contaminated with arsenic, barium, mercury, manganese, lead, and zinc. Previous studies have shown that trace element and metal concentrations in bats were elevated above threshold concentrations. High trace element and metal concentrations in bats suggested that bighorn sheep also may be exposed to these contaminants when using abandoned mines as resting areas. We found evidence of bighorn sheep use, bighorn sheep carcasses, and scat in several abandoned mines. To determine whether bighorn sheep are exposed to, and are accumulating hazardous levels of metals while using abandoned mines, we collected soil samples, as well as scat and bone samples when available. We compared mine soil concentrations to Arizona non-residential clean up levels. Hazard quotients were elevated in several mines and elevated for manganese in one Sheep Tank Mine sample. We analyzed bighorn sheep tissues for trace elements. We obtained blood, liver, and bone samples from hunter-harvested bighorn in 2000 and 2001. Arizona Game and Fish Department also collected blood from bighorn during a translocation operation in 2001. Iron and magnesium were elevated in tissues compared to reference literature concentrations in other species. Most often, domestic sheep baseline levels were used for comparison because of limited available data for bighorn sheep.
    [Show full text]
  • By Douglas P. Klein with Plates by G.A. Abrams and P.L. Hill U.S. Geological Survey, Denver, Colorado
    U.S DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY STRUCTURE OF THE BASINS AND RANGES, SOUTHWEST NEW MEXICO, AN INTERPRETATION OF SEISMIC VELOCITY SECTIONS by Douglas P. Klein with plates by G.A. Abrams and P.L. Hill U.S. Geological Survey, Denver, Colorado Open-file Report 95-506 1995 This report is preliminary and has not been edited or reviewed for conformity with U.S. Geological Survey editorial standards. The use of trade, product, or firm names in this papers is for descriptive purposes only, and does not imply endorsement by the U.S. Government. STRUCTURE OF THE BASINS AND RANGES, SOUTHWEST NEW MEXICO, AN INTERPRETATION OF SEISMIC VELOCITY SECTIONS by Douglas P. Klein CONTENTS INTRODUCTION .................................................. 1 DEEP SEISMIC CRUSTAL STUDIES .................................. 4 SEISMIC REFRACTION DATA ....................................... 7 RELIABILITY OF VELOCITY STRUCTURE ............................. 9 CHARACTER OF THE SEISMIC VELOCITY SECTION ..................... 13 DRILL HOLE DATA ............................................... 16 BASIN DEPOSITS AND BEDROCK STRUCTURE .......................... 20 Line 1 - Playas Valley ................................... 21 Cowboy Rim caldera .................................. 23 Valley floor ........................................ 24 Line 2 - San Luis Valley through the Alamo Hueco Mountains ....................................... 25 San Luis Valley ..................................... 26 San Luis and Whitewater Mountains ................... 26 Southern
    [Show full text]
  • Lexicon of Geologic Names of Southern Arizona Larry Mayer, 1978, Pp
    New Mexico Geological Society Downloaded from: http://nmgs.nmt.edu/publications/guidebooks/29 Lexicon of geologic names of southern Arizona Larry Mayer, 1978, pp. 143-156 in: Land of Cochise (Southeastern Arizona), Callender, J. F.; Wilt, J.; Clemons, R. E.; James, H. L.; [eds.], New Mexico Geological Society 29th Annual Fall Field Conference Guidebook, 348 p. This is one of many related papers that were included in the 1978 NMGS Fall Field Conference Guidebook. Annual NMGS Fall Field Conference Guidebooks Every fall since 1950, the New Mexico Geological Society (NMGS) has held an annual Fall Field Conference that explores some region of New Mexico (or surrounding states). Always well attended, these conferences provide a guidebook to participants. Besides detailed road logs, the guidebooks contain many well written, edited, and peer-reviewed geoscience papers. These books have set the national standard for geologic guidebooks and are an essential geologic reference for anyone working in or around New Mexico. Free Downloads NMGS has decided to make peer-reviewed papers from our Fall Field Conference guidebooks available for free download. Non-members will have access to guidebook papers two years after publication. Members have access to all papers. This is in keeping with our mission of promoting interest, research, and cooperation regarding geology in New Mexico. However, guidebook sales represent a significant proportion of our operating budget. Therefore, only research papers are available for download. Road logs, mini-papers, maps, stratigraphic charts, and other selected content are available only in the printed guidebooks. Copyright Information Publications of the New Mexico Geological Society, printed and electronic, are protected by the copyright laws of the United States.
    [Show full text]
  • GSA ROCKY MOUNTAIN/CORDILLERAN JOINT SECTION MEETING 15–17 May Double Tree by Hilton Hotel and Conference Center, Flagstaff, Arizona, USA
    Volume 50, Number 5 GSA ROCKY MOUNTAIN/CORDILLERAN JOINT SECTION MEETING 15–17 May Double Tree by Hilton Hotel and Conference Center, Flagstaff, Arizona, USA www.geosociety.org/rm-mtg Sunset Crater is a cinder cone located north of Flagstaff, Arizona, USA. Program 05-RM-cvr.indd 1 2/27/2018 4:17:06 PM Program Joint Meeting Rocky Mountain Section, 70th Meeting Cordilleran Section, 114th Meeting Flagstaff, Arizona, USA 15–17 May 2018 2018 Meeting Committee General Chair . Paul Umhoefer Rocky Mountain Co-Chair . Dennis Newell Technical Program Co-Chairs . Nancy Riggs, Ryan Crow, David Elliott Field Trip Co-Chairs . Mike Smith, Steven Semken Short Courses, Student Volunteer . Lisa Skinner Exhibits, Sponsorship . Stephen Reynolds GSA Rocky Mountain Section Officers for 2018–2019 Chair . Janet Dewey Vice Chair . Kevin Mahan Past Chair . Amy Ellwein Secretary/Treasurer . Shannon Mahan GSA Cordilleran Section Officers for 2018–2019 Chair . Susan Cashman Vice Chair . Michael Wells Past Chair . Kathleen Surpless Secretary/Treasurer . Calvin Barnes Sponors We thank our sponsors below for their generous support. School of Earth and Space Exploration - Arizona State University College of Engineering, Forestry, and Natural Sciences University of Arizona Geosciences (Arizona LaserChron Laboratory - ALC, Arizona Radiogenic Helium Dating Lab - ARHDL) School of Earth Sciences & Environmental Sustainability - Northern Arizona University Arizona Geological Survey - sponsorship of the banquet Prof . Stephen J Reynolds, author of Exploring Geology, Exploring Earth Science, and Exploring Physical Geography - sponsorship of the banquet NOTICE By registering for this meeting, you have acknowledged that you have read and will comply with the GSA Code of Conduct for Events (full code of conduct listed on page 31) .
    [Show full text]
  • Paleoseismology of the North Anatolian Fault at Güzelköy
    Paleoseismology of the North Anatolian Fault at Güzelköy (Ganos segment, Turkey): Size and recurrence time of earthquake ruptures west of the Sea of Marmara Mustapha Meghraoui, M. Ersen Aksoy, H Serdar Akyüz, Matthieu Ferry, Aynur Dikbaş, Erhan Altunel To cite this version: Mustapha Meghraoui, M. Ersen Aksoy, H Serdar Akyüz, Matthieu Ferry, Aynur Dikbaş, et al.. Pale- oseismology of the North Anatolian Fault at Güzelköy (Ganos segment, Turkey): Size and recurrence time of earthquake ruptures west of the Sea of Marmara. Geochemistry, Geophysics, Geosystems, AGU and the Geochemical Society, 2012, 10.1029/2011GC003960. hal-01264190 HAL Id: hal-01264190 https://hal.archives-ouvertes.fr/hal-01264190 Submitted on 1 Feb 2016 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Article Volume 13, Number 4 12 April 2012 Q04005, doi:10.1029/2011GC003960 ISSN: 1525-2027 Paleoseismology of the North Anatolian Fault at Güzelköy (Ganos segment, Turkey): Size and recurrence time of earthquake ruptures west of the Sea of Marmara Mustapha Meghraoui Institut de Physique du Globe de Strasbourg (UMR 7516), F-67084 Strasbourg, France ([email protected]) M. Ersen Aksoy Institut de Physique du Globe de Strasbourg (UMR 7516), F-67084 Strasbourg, France Eurasia Institute of Earth Sciences, Istanbul Technical University, 34469 Istanbul, Turkey Now at Instituto Dom Luiz, Universidade de Lisboa, P-1750-129 Lisbon, Portugal H.
    [Show full text]
  • Runoff and Sediment Yield from Proxy Records: Upper Animas Creek Basin, New Mexico
    United States Department of Agriculture Runoff and Sediment Yield from Forest Service Proxy Records: Rocky Mountain Research Station Research Paper RMRS-RP-18 Upper Animas Creek Basin, New Mexico June 1999 W. R. Osterkamp Abstract Osterkamp, W. R. 1999. Runoff and sediment yield from proxy records: upper Animas Creek Basin, New Mexico. Res. Pap. RMRS-RP-18. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 50 p. Analyses of water- and sediment-yield records from the Walnut Gulch Experimental Watershed, the San Simon Wash Basin, and the Jornada Experimental Range, combined with observations of regional variations in climate, geology and soils, vegetation, topography, fire frequency, and land-use history, allow estimates of present conditions of water and sediment discharges in the upper Animas Creek Basin, New Mexico. Further, the records are used to anticipate fluxes of water and sediment should watershed conditions change. Results, intended principally for hydrologists, geomorpholo- gists, and resource managers, suggest that discharges of water and sediment in the upper Animas Creek Basin approximate those of historic, undisturbed conditions, and that erosion rates may be generally lower than those of comparison watersheds. If conversion of grassland to shrubland occurs, sediment yields, due to accelerated upland gully erosion, may increase by 1 to 3 orders of magnitude. However, much of the released sediment would likely be deposited along Animas Creek, never leaving the upper Animas Creek Basin. Keywords: runoff, sediment yield, erosion, Animas Creek Author W. R. Osterkamp is a research hydrologist with the U. S. Geological Survey, Water Resources Division, Tucson, AZ.
    [Show full text]
  • Animated Tectonic Reconstruction of the Lower Colorado River Region: Implications for Late Miocene to Present Deformation Scott E
    Animated tectonic reconstruction of the Lower Colorado River region: implications for Late Miocene to Present deformation Scott E. K. Bennett,1 Michael H. Darin,2 Rebecca J. Dorsey,3 Lisa A. Skinner,2 Paul J. Umhoefer,2 and Michael E. Oskin4 1U.S. Geological Survey, 2Northern Arizona University, 3University of Oregon, 4University of California, Davis Introduction of upper crustal structures that accommodated Although the majority of late Miocene to present intracontinental strain and improves our understanding Pacic–North America plate boundary strain has been of the processes that promoted localized or diuse strain accommodated by faults of the San Andreas and Gulf during reorganization of the Pacic–North America of California systems, growing evidence of dextral shear plate boundary. east of the San Andreas Fault indicates that a component Map-view translations of crustal blocks inuence of plate boundary deformation occurred in the lower the relative motions of adjacent blocks, an approach Colorado River (LoCR) region. Large-scale tectonic adhered to in global plate-circuit models (Atwater and reconstructions across the Gulf of California and Salton Stock, 1998; 2013). us, a synthesis of the magnitude Trough (GCAST) region (Fig. 1), a ~500 km-wide and timing of horizontal strain across a broad zone zone of deformation that aected the western margin of distributed deformation can provide insight into of North America, provide important constraints on processes of strain partitioning and potential kinematic the location, timing, style, and magnitude of crustal links between adjacent structural domains. Furthermore, deformation in the LoCR region (Fig. 2). Characterizing it can help prioritize and guide future work by Miocene to present deformation in the LoCR region identifying gaps in our understanding of plate boundary is important to resolve the presence and kinematics deformation and provide a degree of predictability Figure 1.
    [Show full text]
  • Horst Inversion Within a Décollement Zone During Extension Upper Rhine Graben, France Joachim Place, M Diraison, Yves Géraud, Hemin Koyi
    Horst Inversion Within a Décollement Zone During Extension Upper Rhine Graben, France Joachim Place, M Diraison, Yves Géraud, Hemin Koyi To cite this version: Joachim Place, M Diraison, Yves Géraud, Hemin Koyi. Horst Inversion Within a Décollement Zone During Extension Upper Rhine Graben, France. Atlas of Structural Geological Interpretation from Seismic Images, 2018. hal-02959693 HAL Id: hal-02959693 https://hal.archives-ouvertes.fr/hal-02959693 Submitted on 7 Oct 2020 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Horst Inversion Within a Décollement Zone During Extension Upper Rhine Graben, France Joachim Place*1, M. Diraison2, Y. Géraud3, and Hemin A. Koyi4 1 Formerly at Department of Earth Sciences, Uppsala University, Sweden 2 Institut de Physique du Globe de Strasbourg (IPGS), Université de Strasbourg/EOST, Strasbourg, France 3 Université de Lorraine, Vandoeuvre-lès-Nancy, France 4 Department of Earth Sciences, Uppsala University, Sweden * [email protected] The Merkwiller–Pechelbronn oil field of the Upper Rhine Graben has been a target for hydrocarbon exploration for over a century. The occurrence of the hydrocarbons is thought to be related to the noticeably high geothermal gradient of the area.
    [Show full text]
  • Basin Inversion and Structural Architecture As Constraints on Fluid Flow and Pb-Zn Mineralisation in the Paleo-Mesoproterozoic S
    https://doi.org/10.5194/se-2020-31 Preprint. Discussion started: 6 April 2020 c Author(s) 2020. CC BY 4.0 License. 1 Basin inversion and structural architecture as constraints on fluid 2 flow and Pb-Zn mineralisation in the Paleo-Mesoproterozoic 3 sedimentary sequences of northern Australia 4 5 George M. Gibson, Research School of Earth Sciences, Australian National University, Canberra ACT 6 2601, Australia 7 Sally Edwards, Geological Survey of Queensland, Department of Natural Resources, Mines and Energy, 8 Brisbane, Queensland 4000, Australia 9 Abstract 10 As host to several world-class sediment-hosted Pb-Zn deposits and unknown quantities of conventional and 11 unconventional gas, the variably inverted 1730-1640 Ma Calvert and 1640-1580 Ma Isa superbasins of 12 northern Australia have been the subject of numerous seismic reflection studies with a view to better 13 understanding basin architecture and fluid migration pathways. Strikingly similar structural architecture 14 has been reported from much younger inverted sedimentary basins considered prospective for oil and gas 15 elsewhere in the world. Such similarities suggest that the mineral and petroleum systems in Paleo- 16 Mesoproterozoic northern Australia may have spatially and temporally overlapped consistent with the 17 observation that basinal sequences hosting Pb-Zn mineralisation in northern Australia are bituminous or 18 abnormally enriched in hydrocarbons. This points to the possibility of a common tectonic driver and shared 19 fluid pathways. Sediment-hosted Pb-Zn mineralisation coeval with basin inversion first occurred during the 20 1650-1640 Ma Riversleigh Tectonic Event towards the close of the Calvert Superbasin with further pulses 21 accompanying the 1620-1580 Ma Isa Orogeny which brought about closure of the Isa Superbasin.
    [Show full text]