PDF. Oxygen isotope compositions of epidote and quartz from chloritic breccias that underlie the detachment fault in the metamorphic core complex of the Whipple Mountains yielded quartz-epidote fractionations that range from 4.1 to 6.4 per mil and increase systematically toward the fault. Prominent crustal reflections beginning at 3-4 s were recorded on CALCRUST seismic profiles southwest of the Whipple Mountains. Chloritic breccias beneath the Whipple detachment fault (WDF) have much lower seismic impedance than that of rocks occurring both structurally above and below. OSTI.GOV Conference: Evidence for late movement on the Whipple detachment fault, southeastern California PDF. PDF. Download books for free. Journal of Structural Geology, 14, 1033-1046. the Whipple Mountain Detachment Fault. 1988. Free PDF. Download PDF. We conclude that a large rollover growth structure formed in the hanging wall of the Whipple detachment fault shortly prior to emplacement of the voluminous War Eagle landslide (megabreccia). A short summary of this paper. The role of extensional tectonics in the Caledonides of South Norway. B. die Whipple Mountain Detachment Fault. 1), has an areal extent in excess of 10,000 km 2, involves a relative displacement of at least 40 km, and juxtaposes rock types with radically different geological histories (Davis & Lister 1988). Detachment Fault Model Detachment faulting is thought to have played an important role in the Tertiary evolution of the Sacramento Mountains, so it is necessary to expand upon a simple reference to the process. This paper. Oxygen isotope compositions of epidote and quartz from chloritic breccias that underlie the detachment fault in the metamorphic core complex of the Whipple Mountains yielded quartz-epidote fractionations that range from 4.1 to 6.4 per mil and increase systematically toward the fault. Mylonitic gneisses of upper greenschist to middle amphibolite facies grade are exposed below the Whipple detachment fault in the Whipple Mountains metamorphic core complex. Within the Whipple Mountains, the detachment fault often crops out as a ledge of impermeable micro breccia. Rocks from the lower plate were brought to the surface during the later stages of detachment‐fault activity thereby producing sufficient topographic relief for large landslides to … Whipple Mtn. These axes coincide with the major or long axes of fault corrugations (Figure 2c). Compared to the main detachment, MDs … The role of extensional tectonics in the Caledonides of South Norway. The footwall was exhumed from below the brittle–ductile transition and has a ∼3.5 km thick mylonite zone with the same shear sense as the brittle slip on the detachment surface and that is … Binet y explique que la version de 1908 a fait l’objet d’éloges autant que de critiques, citant notamment les travaux des Américains Henry H. Goddard (1866-1957) et Guy Montrose Whipple (1876-1941) et que certains points devaient donc être améliorés. The low-angle Whipple Mountains detachment fault divides the crust into upper and lower plates. In the Whipple Mountains, just the exposed portion of the detachment fault is more than 30 … To link to the entire object, paste this link in email, IM or document To embed the entire object, paste this HTML in website To link to this page, paste this link in email, IM or It is along such contacts that the cataclasite appears to be best developed. Continued extensional evolution of the Whipple detachment fault caused tilting of the upper‐plate strata and the formation of numerous half and full grabens as well as roll‐over structures. Geology, 1994. WikiMatrix. plate of the Whipple detachment fault are defined by my- lonitic foliation and sheetlike granitic plutons [Davis et al., 1980, 1982]. en The latter is underlain by blind reverse faults probably merging into a detachment fault … cataclastic and ultracataclastic rocks (including pseudo- Whipple Mountains metamorphic core complex (Figure 1 tachylyte), and (4) chlorite-epidote alteration of the mylo- and Table S1 of the auxiliary material), with most attention nites. Detachment Fault, CA. The Whipple detachment fault in E. California is a classic example of a large-displacement (~40 km), low-angle normal fault formed during Miocene Basin and Range extension. en Detachment fault related shear zones can be found in southeastern California, e.g. 1992. These fractionations give mean temperatures that decrease from ∼432°C at 50 meters below the fault … ^ Davis GA. (1988). Il précise alors comment certaines épreuves ont été modifiées, d’autres ajoutées ou retirées. By contrast, LANF fault rocks exhumed from the mid-crustal brittle–plastic transition at temperatures of 250 to 420 °C, several LANFs (the Woodlark Basin detachment, Zuccalle Fault, and the Whipple Detachment) exhibit compelling field evidence for overpressure, such as fault-parallel tensile veins (Roller et al., 2001, Collettini et al., 2006, Selverstone et al., 2012) The detachment faul tis characterized by a typically smooth, planar fault surface which is … ^Fossen H. (1992). Yin, A., and Dunn, J.F., 1992, Structural and stratigraphic development of the Whipple-Chemehuevi detachment fault system, southeastern California: Implications for the geometrical evolution of domal and basinal low-angle normal faults: Geological Society of America Bulletin, v. 104, p. 659-674. ↑Haakon Fossen. dipping Whipple detachment fault of southeastern California, and western Arizona, for example (Fig. Meaning of Detachment fault. Premium PDF Package. The footwall of this fault exhibits a range of mid-crustal rocks deformed near the brittle-ductile transition, including mylonites, cataclasites, and pseudotachylites, which provide insight into mid-crustal … As first described by Greg Davis (circa, 1982) for the Whipple Mountains; a listric normal fault The mylonitic front is a gradational SW-dipping contact between Tertiary mylonitic gneisses and structurally higher, … Rapid upward transport of mid-crustal mylonitic gneisses in the footwall of a Miocene detachment fault, Whipple Mountains, southeastern California. The present-day landform of the Whipple Mountains is a series of sub-parallel ridges trending northwest to southeast, cut at right angles by a large wash, (Whipple Wash), which bisects the entire range.These linear ridges mark the tops of tilted crustal blocks lying in the hanging wall of an extensive detachment fault, and the range as a whole comprises one of the best exposed … Dorsey, R.J., and Roberts, Patricia, 1996, Evolution of the Miocene north Whipple basin in the Aubrey Hills, western Arizona, upper plate of the Whipple detachment fault, in Beratan, K.K., ed., Reconstructing the history of Basin and Range extension using sedimentology and stratigraphy: Geological Society of America Special Paper 303, p. 127-146. Find books Information and translations of Detachment fault in the most comprehensive dictionary definitions resource on the web. These fractionations give mean temperatures that decrease from approximately 432 … ↑Fossen H. (1992). They are younger than or coeval with chloride brecciation, and those that record shear typically are either moderately northeast-dipping normal structures or steep, northwest-striking, southwest-down structures … Le client | Grisham John | download | Z-Library. The role of extensional tectonics in the Caledonides of South Norway. I’m a Ph.D student working with Dr. Chloë Bonamici in the fields of metamorphic petrology and stable isotope geochemistry at the University of Wisconsin-Madison. Whipple detachment fault). The absence of a detachment … However, the my- lonitic foliation generally dips 5 o to 25 o more steeply than the fault [Davis, 1988]. Journal of Structural Geology, 14:1033–1046. Fabric and microstructural analyses of the thick (>3.5 km) mylonitic sequence indicate that it represents an intracrustal zone of non-coaxial laminar flow with a predominant sense of northeastward shear. Rapid upward transport of mid-crustal mylonitic gneisses in the footwall of a Miocene detachment fault, Whipple Mountains, southeastern California. About me ¡Hola! Download PDF Package. Download Free PDF. Stress state and fluid-pressure level along the Whipple detachment fault, California. Download Full PDF Package. Brittle structures in the upper 200 m of the footwall of the Whipple detachment fault are used to characterize the state of stress under which the detachment slipped. de Abscherungen des Kernkomplextyps sind sehr häufig im südöstlichen Kalifornien anzutreffen, so z. Crystalline rocks of the lower plate are exposed in the core of a complex dome, and are separated into two structural domains by the Whipple mylonitic front. The rock record of seimic nucleation: a case study from the Whipple Mountains Detachment Fault, eastern California Daniel Ortega-Arroyo, Whitney M. Behr, & Emilie Gentry Submitted August 15, 2017, SCEC Contribution #7686, 2017 SCEC Annual Meeting Poster #114 Despite advances in our understanding of the physics of earthquakes, the mechanisms by which … Rapid upward transport of mid-crustal mylonitic gneisses in the footwall of a Miocene detachment fault, Whipple Mountains, southeastern California. Photo by C.Roig. Definition of Detachment fault in the Definitions.net dictionary. However, the significant thinning of the chloritic breccia zone to the southwest of the Whipple Mountains may have caused the poor image of the WDF on the CALCRUST profiles. Below the fault is a chlorite breccia zone, up to 400 feet thick, whose rocks have been altered, faulted, and brecciat ed. My name is Claudia. Journal of Structural Geology, 14:1033–1046. Estimation du changement de règle (9000 hab) Estimation élaborée le 17 Janvier 2020, la règle a subi plusieurs modifications depuis mais donne idée de l'impact du changement En attendant les publications des données sur les élections municipales, je vous propose de découvrir l'impact du changement des règles pour les élections municipales 2020. Davis and Lister [1989] attributed this discordance to multiple … Brecciated clasts within this zone have a matrix of chlorite, epidote, silica, and sulfide minerals, especially pyrite; the alteration and mineralization render … PDF. ↑ Davis GA. (1988). Jane Selverstone. The Whipple detachment fault (WDF) is a low-angle normal fault (LANF) that accommodated 40–50 km of top-NE extension from ∼25 to 16 Ma (Davis et al., 1980). ↑ Davis, G.A. The Whipple detachment fault apparently developed within crystalline rocks, but in some places now separates upper-plate Tertiary sedimentary and volcanic rocks from lower-plate cryste.lline rocks. 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