Relevant bibliographies by topics / Emplacement kinematics

Academic literature on the topic 'Emplacement kinematics'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Emplacement kinematics"

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Abu, Clara, Christopher A. L. Jackson, and Malcolm Francis. "Strike-slip overprinting of initial co-axial shortening within the toe region of a submarine landslide and a model for basal shear surface growth: a case study from the Angoche Basin, offshore Mozambique." Journal of the Geological Society 179, no. 2 (October 18, 2021): jgs2021–032. http://dx.doi.org/10.1144/jgs2021-032.

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Submarine landslides (slides) are some of the most voluminous sediment gravity-flows on Earth and they dominate the stratigraphic record of many sedimentary basins. Their general kinematics and internal structure are relatively well-understood. However, how slides increase in volume and internally deform as they evolve, and how these processes relate, in time and space, to the growth of their basal (shear) zone, are poorly understood. We here use three high-resolution 3D seismic surveys from the Angoche Basin, offshore Mozambique to map strain within a shallowly buried, large, and thus seismically well-imaged slide (c. 530 km3). We document several key kinematic indicators, including broadly NW-trending lateral margins and longitudinal shears bounding and within the slide body, respectively, and broadly NE-trending symmetric pop-up blocks in the slide toe. Approximately 7 km downdip of the slide toe wall, thrusts and related folds also occur within otherwise undeformed slope material, with thrusts detaching downwards onto the downslope continuation of the basal shear zone underlying the slide body. Based on the style, trend and distribution of these features, and their cross-cutting relationships, we propose an emplacement model involving two distinct phases of deformation: (i) bulk shortening, parallel to the overall SE-directed emplacement direction, with contractional shear strains reaching c. 8%; and (ii) the development of broadly emplacement direction-parallel shear zones that offset the earlier-formed shortening structures. We infer that the contractional strains basinward of the slide body formed due to cryptic basinward propagation of the basal shear zone ahead of, and to accommodate updip sliding and shortening associated with, the entire slide mass. Our study demonstrates the value of using 3D seismic reflection data to reveal slide emplacement kinematics, especially the multiphase, non-coaxial nature of deformation, and the dynamics of basal shear zone growth.
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Ramsay, John G. "Emplacement kinematics of a granite diapir: the Chindamora batholith, Zimbabwe." Journal of Structural Geology 11, no. 1-2 (January 1989): 191–209. http://dx.doi.org/10.1016/0191-8141(89)90043-6.

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Benn, Keith. "Anisotropy of magnetic susceptibility fabrics in syntectonic plutons as tectonic strain markers: the example of the Canso pluton, Meguma Terrane, Nova Scotia." Earth and Environmental Science Transactions of the Royal Society of Edinburgh 100, no. 1-2 (March 2009): 147–58. http://dx.doi.org/10.1017/s1755691009016028.

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ABSTRACTThe anisotropy of magnetic susceptibility (AMS) is widely and routinely used to measure the preferred orientations of Fe-rich minerals in undeformed and weakly deformed granite plutons. The interpretation of the mapped AMS fabrics depends on rock-textural observations, on the map patterns of the fabrics in plutons, and on comparisons of the pluton fabrics to tectonic structures in the country rocks. The AMS may document emplacement-flow related fabrics, but the emplacement fabrics may be reworked or completely overprinted by rather weak tectonic strains of the magma mush or the cooling pluton, especially in syntectonic intrusions. The Late Devonian Canso granite pluton is an excellent example of overprinting of emplacement fabrics by weak tectonic strains. The Canso pluton was emplaced ca. 370 Ma along the boundary between the Meguma and Avalon tectonic terranes, in the northern Appalachian orogen. The AMS was mapped along two traverses that cross the pluton and that are perpendicular to the terrane boundary. Textural evidence suggests the rocks underwent very modest post-full crystallisation strains. The AMS records the dextral transcurrent shearing that occurred on the terrane boundary during emplacement and cooling of the Canso pluton, supporting interpretations that weakly deformed syntectonic granites can be used as indicators of regional bulk kinematics. AMS fabrics in Late Devonian granites of the Meguma Terrane suggest partitioning of the non-coaxial shearing into the terrane bounding fault, with pure-shear dominated deformation further from the fault. Numerical simulations suggest that the kinematics recorded by the fabrics in the Canso pluton was simple-shear, or transpression or transpression with small components of pure shear oriented perpendicular to the bounding shear zone.
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Mugnier, J. L., and L. Endignoux. "Kinematics and velovity of thrust sheets emplacement: a numerical simulation (In French)." International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts 29, no. 2 (March 1992): A73. http://dx.doi.org/10.1016/0148-9062(92)92134-x.

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Beslier, M. O., J. Girardeau, and G. Boillot. "Kinematics of peridotite emplacement during North Atlantic continental rifting, Galicia, northwestern Spain." Tectonophysics 184, no. 3-4 (December 1990): 321–43. http://dx.doi.org/10.1016/0040-1951(90)90446-f.

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Paguican, E. M. R., B. van Wyk de Vries, and A. M. F. Lagmay. "Volcano-tectonic controls and emplacement kinematics of the Iriga debris avalanches (Philippines)." Bulletin of Volcanology 74, no. 9 (October 4, 2012): 2067–81. http://dx.doi.org/10.1007/s00445-012-0652-7.

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Pubellier, Manuel, Christophe Monnier, René Maury, and R. Tamayo. "Plate kinematics, origin and tectonic emplacement of supra-subduction ophiolites in SE Asia." Tectonophysics 392, no. 1-4 (November 2004): 9–36. http://dx.doi.org/10.1016/j.tecto.2004.04.028.

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Benn, Keith, Francis Odonne, Sharon K. Y. Lee, and Ken Darcovich. "Analogue scale models of pluton emplacement during transpression in brittle and ductile crust." Earth and Environmental Science Transactions of the Royal Society of Edinburgh 91, no. 1-2 (2000): 111–21. http://dx.doi.org/10.1017/s0084255900006021.

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Analogue experiments were used to investigate pluton emplacement during transpression in a layered crust. Models consisted of (1) a silicone gum-PbO suspension as analogue magma, (2) a silicone gum-Pb suspension as a basal ductile layer, and (3) an overlying sand pack representing brittle crust. The models were transpressed at 3 mm/hr causing the extrusion of the analogue magma from a progressively closing slot, and its emplacement into the ductile layer. The thicknesses of the layers were critical in controlling the shapes of intrusions and the structures that developed in the brittle overburden. Thicker sand packs led to flattened, symmetrical laccolith-shaped intrusions and the nucleation of one oblique thrust in the sand pack above the extremity of the intrusion. Thinner sand packs led to thicker, asymmetrical laccolith-like intrusions with uplift of the overburden on an oblique thrust, and the formation of a shallow graben in the extrados of a bending fold. Reducing the thickness of the basal ductile layer resulted in a larger number of shear zones in the sand pack, and structural geometries approaching those produced in experiments involving only a brittle analogue crust and no ductile layer. Shear zones in the sand pack were localised by intrusions, and also played a key role in displacing analogue brittle crust to make space for intrusions. The results suggest that tectonic forces may play an important role in displacing blocks of crust during pluton emplacement in transpressional belts. They also suggest that pluton shapes, and the geometries and kinematics of emplacement-related shear zones and faults, may depend on the depth of emplacement. In nature, depending on the structural level exposed in the map plane, faults and shear zones that helped make space for emplacement may not appear to be spatially associated with the pluton.
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Fawcett, Tammy C., Russell F. Burmester, Bernard A. Housen, and Alexander Iriondo. "Tectonic implications of magnetic fabrics and remanence in the Cooper Mountain pluton, North Cascade Mountains, Washington." Canadian Journal of Earth Sciences 40, no. 10 (October 1, 2003): 1335–56. http://dx.doi.org/10.1139/e03-055.

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Documenting the timing and kinematics of deformation in orogens is critical to unraveling their history. Anisotropy of magnetic susceptibility defines the orientation of magnetic fabrics in the Eocene Cooper Mountain pluton in the North Cascade Mountains of Washington. The magnetic foliation typically has a steep dip and a northwest strike; the magnetic lineation plunges moderately to shallowly northwest or southeast. The remanent magnetization was measured to determine if the Cooper Mountain pluton has been tilted following emplacement. The remanence has two components. The characteristic remanence typically unblocks at 370 °C in most specimens, but at 580 °C in others. The two components are carried by pyrrhotite and magnetite. Mean directions of these components are indistinguishable from each other and from the North American expected Eocene direction. The paleomagnetic results and ~ 47 Ma 40Ar–39Ar total fusion ages from biotite suggest that there has been no remagnetization or significant reorientation of the pluton since emplacement. Therefore, the in situ magnetic fabrics from the pluton can be used to understand the kinematics. Discordance of the fabrics with the pluton margin and near concordance with regional structures suggests that they have a tectonic origin. Thus the Cooper Mountain pluton is syntectonic rather than posttectonic. The magmatic fabric is slightly oblique to the length of the Cascade orogen, which can be explained if it formed as a consequence of regional dextral shear during transpression.
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Cheng, Nannan, Quanlin Hou, Mengyan Shi, Miao He, Qing Liu, Fangchao Yan, and Hongwei Liu. "New Insight into the Genetic Mechanism of Shear Zone Type Gold Deposits from Muping-Rushan Metallogenic Belt (Jiaodong Peninsula of Eastern China)." Minerals 9, no. 12 (December 12, 2019): 775. http://dx.doi.org/10.3390/min9120775.

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Most gold deposits are genetically controlled by shear zones, which are called shear zone type gold deposits (SZTGD). A better understanding of kinematics of shear zones and its constraint on the ore-forming process is critical to reveal the genetic mechanism of the SZTGD and favorable to mineral exploration. By conducting detailed structural analysis including field and microscopic observations and electron backscatter diffraction (EBSD) and fractal dimension analysis in the Muping-Rushan shear zone (MR) as well as several gold deposits, the kinematic characteristics of the MR are well recognized and the metallogenic process of the SZTGD are discussed. The main conclusions are as follows: (1) petrology, geometry, kinematics, macro- and micro-structures imply that the MR has experienced a progressive shearing history exhumed via middle crust to subsurface level under the NW-SE extensional regime from late Jurassic to early Cretaceous; (2) in the MR, gold may precipitate both in the brittle fractures at middle crust level and brittle deformation part at shallow crust level during the stress-chemical process and (3) comparison of gold deposits between the MR and other areas show that the SZTGD has a uniform metallogenic mechanism, which is from (multi-stage) pluton emplacement, hydrothermal fluid action, shearing action, brittle fracturing, sudden reduction of fluid pressure, flash vaporization to (gold) mineralization.
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Dissertations / Theses on the topic "Emplacement kinematics"

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Ghikas, Constandina Anastasios. "Structure and tectonics of a subophilitic mélange (Zavordas mélange) of the Vourinos ophiolite (Greece) and kinematics of ophiolite emplacement." Oxford, Ohio : Miami University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=miami1180142605.

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Ghikas, Constandina Anastasios. "STRUCTURE AND TECTONICS OF A SUBOPHILITIC MÉLANGE (ZAVORDAS MÉLANGE) OF THE VOURINOS OPHIOLITE (GREECE) AND KINEMATICS OF OPHIOLITE EMPLACEMENT." Miami University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=miami1180142605.

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Vines, John Ashley. "Emplacement of the Santa Rita Flat pluton and kinematic analysis of cross cutting shear zones, eastern California." Thesis, Virginia Tech, 1999. http://hdl.handle.net/10919/40531.

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This study documents the deformation history of the Santa Rita Flat pluton, eastern California, from the time of emplacement to post-emplacement transpressional shearing, and consists of manuscripts that make up three chapters. The first chapter addresses the emplacement of the Santa Rita Flat pluton using anisotropy of magnetic susceptibility (AMS). The second chapter describes the kinematic analysis of cross-cutting shear zones within the western margin of the pluton. The third chapter is an informal paper on the U/Pb dating of two sheared felsic dikes from the pluton. AMS of the Santa Rita Flat pluton indicates that the paramagnetic and ferromagnetic minerals define a foliation which is arched into an antiformal structure in the central to southern parts of the pluton. The northern part of the pluton displays an east-west striking magnetic foliation which lacks a fold-like geometry. Previously published field mapping and petrologic surveys of the pluton and surrounding wall rocks indicate that the southern margin and northern part of the Santa Rita Flat pluton represents the roof and core of the pluton, respectively. Integration of our analysis of the internal structure of the pluton with previously published work on the regional structure of the surrounding metasedimentary wall rocks, suggests that the pluton may have initially been intruded as a sill-like or "saddle reef" structure along a stratigraphically controlled mechanical discontinuity in the hinge zone of an enveloping regional-scale synform. Subsequent vertical inflation of this sill resulted in local upward doming of the overlying pluton roof and formation of the antiformal structure now observed at the current erosion level in the central-southern part of the pluton and overlying locally preserved roof rocks. No corresponding fold structure is indicated by AMS analysis in the northern part of the pluton, which is exposed at a deeper level, and represents a section closer to the pluton core. Emplacement of the Santa Rita Flat pluton at 164 Ma overlaps in time with regional deformation at ~185 - ~148 Ma (Middle - Late Jurassic) recognized in the southern Inyo Mountains. Northwest trending folds are pervasive along the western flank of the Inyo and White Mountains, and may have accommodated strains at the lateral tips of thrust faults which crop out in the southern Inyo Mountains. We speculate that space for initial emplacement of the Santa Rita Flat pluton may have been produced by layer-parallel slip and hinge-zone dilation, accompanied by axis-parallel slip during formation of a regional scale thrust-related synform. The Santa Rita shear system (SRSS) is composed of a series of discrete NW-SE striking steeply dipping shear zones that cut and plastically deform granitic rocks of the Santa Rita Flat pluton. The shear zones exhibit a domainal distribution of gently and steeply plunging stretching lineations, and are located at planar mechanical discontinuities between the granite and a series of felsic/mafic dikes which intrude the pluton. Mylonitized dikes within the shear zones contain syntectonic mineral assemblages not observed in dikes outside the shear zones, indicating that the dikes were intruded prior to shear zone development. Correlation with geometrically similar shear zones in the Sierra Nevada batholith to the west, suggests that the SRSS probably nucleated from a regional stress field in Cretaceous times (~90-78 Ma). Strain is heterogeneous within the shear zones, with local development of protomylonite, mylonite, ultramylonite and phyllonite. Strain heterogeneity within the granite is attributed to fluid infiltration and chemical reaction and alteration of feldspar to fine-grained mica. These deformation-induced mineral changes would have resulted in progressive mechanical weakening over time of rocks within the SRSS. The phyllonites occur predominantly within steeply lineated shear zones and contain mylonitized foliation-parallel quartz veins. The pattern of c-axis preferred orientation in these quartz veins indicates that deformation within the shear zones occurred under plane strain conditions. Locally, quartz veins also cut the foliation planes, reflecting high pore fluid pressures during evolution of the SRSS. These cross-cutting quartz veins are also plastically deformed, and their c-axis patterns indicate weak constrictional strains. The orientation of the shear zones, together with their strain paths, are used to develop a transpressional kinematic model for development of the SRSS within a progressively rotating stress field.
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Books on the topic "Emplacement kinematics"

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Steenken, André. The emplacement of the Rieserferner pluton and its relation to the DAV-line as well as to the kinematic and thermal history of the Austroalpine basement (Eastern Alps, Tyrol). Stuttgart: E. Schweizerbart, 2002.

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Book chapters on the topic "Emplacement kinematics"

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Merle, Olivier. "Kinematics." In Emplacement Mechanisms of Nappes and Thrust Sheets, 81–122. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-015-9060-0_4.

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Burkhard, Dorothee J. M. "Crystallization and oxidation during emplacement of lava lobes." In Kinematics and dynamics of lava flows. Geological Society of America, 2005. http://dx.doi.org/10.1130/0-8137-2396-5.67.

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Guilbaud, Marie-Noëlle, Stephen Self, Thorvaldur Thordarson, and Stephen Blake. "Morphology, surface structures, and emplacement of lavas produced by Laki, A.D. 1783–1784." In Kinematics and dynamics of lava flows. Geological Society of America, 2005. http://dx.doi.org/10.1130/0-8137-2396-5.81.

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Cañón-Tapia, Edgardo. "Uses of anisotropy of magnetic susceptibility in the study of emplacement processes of lava flows." In Kinematics and dynamics of lava flows. Geological Society of America, 2005. http://dx.doi.org/10.1130/0-8137-2396-5.29.

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Coppola, D., Th Staudacher, and C. Cigolini. "The May–July 2003 eruption at Piton de la Fournaise (La Réunion): Volume, effusion rates, and emplacement mechanisms inferred from thermal imaging and Global Positioning System (GPS) survey." In Kinematics and dynamics of lava flows. Geological Society of America, 2005. http://dx.doi.org/10.1130/0-8137-2396-5.103.

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Andrews, Graham D. M., and Michael J. Branney. "Folds, fabrics, and kinematic criteria in rheomorphic ignimbrites of the Snake River Plain, Idaho: Insights into emplacement and flow." In GSA Field Guide 6: Interior Western United States, 311–27. Geological Society of America, 2005. http://dx.doi.org/10.1130/2005.fld006(15).

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Conference papers on the topic "Emplacement kinematics"

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Walker, Trenton J., and Robert D. Hatcher. "EMPLACEMENT KINEMATICS OF TWO LARGE HORSES ALONG THE GREAT SMOKY FAULT IN THE PARKSVILLE 7.5-MINUTE QUADRANGLE, SOUTHEASTERN TENNESSEE." In 66th Annual GSA Southeastern Section Meeting - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017se-291326.

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Lee, Esther, Claudia Adam, and Pamela D. Kempton. "NEW CONSTRAINTS ON NORTH AMERICAN KIMBERLITE EMPLACEMENT FROM KINEMATIC AND GEOPHYSICAL MODELS." In GSA Connects 2022 meeting in Denver, Colorado. Geological Society of America, 2022. http://dx.doi.org/10.1130/abs/2022am-381024.

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Reports on the topic "Emplacement kinematics"

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Benn, K., M. Genkin, C. R. van Staal, and S. Lin. Structure and anisotropy of magnetic susceptibility of the Rose Blanche Granite, southwestern Newfoundland: kinematics and relative timing of emplacement. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1993. http://dx.doi.org/10.4095/134273.

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