In order to interpret these seismic reflections and to understand why detachment faults are imaged on some profiles but not on others, we collected oriented rock specimens from all major structural units in the Whipple … The low-angle Whipple Mountains detachment fault divides the crust into upper and lower plates. What does Detachment fault mean? 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. Detachment Fault, CA. Whipple Mtn. Download PDF. Journal of Structural Geology, 14:1033–1046. B. die Whipple Mountain Detachment Fault. Le client | Grisham John | download | Z-Library. 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. ^ Davis GA. (1988). 1988. Photo by C.Roig. 1992. Samples from the main Whipple detachment fault were collected at WA, BW1, BWSK, and BWNL. 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 … 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 … Free PDF. The detachment faul tis characterized by a typically smooth, planar fault surface which is … 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. Rapid upward transport of mid-crustal mylonitic gneisses in the footwall of a Miocene detachment fault, Whipple Mountains, southeastern California. en Detachment fault related shear zones can be found in southeastern California, e.g. The role of extensional tectonics in the Caledonides of South Norway. 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. In the Whipple Mountains, just the exposed portion of the detachment fault is more than 30 … 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. Compared to the main detachment, MDs … OSTI.GOV Conference: Evidence for late movement on the Whipple detachment fault, southeastern California Brecciated clasts within this zone have a matrix of chlorite, epidote, silica, and sulfide minerals, especially pyrite; the alteration and mineralization render … Find books Below the fault is a chlorite breccia zone, up to 400 feet thick, whose rocks have been altered, faulted, and brecciat ed. Prominent crustal reflections beginning at 3-4 s were recorded on CALCRUST seismic profiles southwest of the Whipple Mountains. Davis and Lister [1989] attributed this discordance to multiple … plate of the Whipple detachment fault are defined by my- lonitic foliation and sheetlike granitic plutons [Davis et al., 1980, 1982]. Premium PDF Package. 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 … dipping Whipple detachment fault of southeastern California, and western Arizona, for example (Fig. 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 About me ¡Hola! Mylonitic gneisses of upper greenschist to middle amphibolite facies grade are exposed below the Whipple detachment fault in the Whipple Mountains metamorphic core complex. 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. 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. Stress state and fluid-pressure level along the Whipple detachment fault, California. Journal of Structural Geology, 14:1033–1046. The role of extensional tectonics in the Caledonides of South Norway. Tertiary sedimentation along the Lake Mead fault system, Virgin Mountains, Nevada-Arizona Within the Whipple Mountains, the detachment fault often crops out as a ledge of impermeable micro breccia. These fractionations give mean temperatures that decrease from approximately 432 … ↑Haakon Fossen. Definition of Detachment fault in the Definitions.net dictionary. en The latter is underlain by blind reverse faults probably merging into a detachment fault … 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. PDF. 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). ↑Fossen H. (1992). 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. A short summary of this paper. Journal of Structural Geology, 14, 1033-1046. These axes coincide with the major or long axes of fault corrugations (Figure 2c). 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. Chloritic breccias beneath the Whipple detachment fault (WDF) have much lower seismic impedance than that of rocks occurring both structurally above and below. 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. PDF. 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. Information and translations of Detachment fault in the most comprehensive dictionary definitions resource on the web. Whipple detachment fault). PDF. ↑ Davis GA. (1988). However, the my- lonitic foliation generally dips 5 o to 25 o more steeply than the fault [Davis, 1988]. Geology, 1994. ↑ Davis, G.A. de Abscherungen des Kernkomplextyps sind sehr häufig im südöstlichen Kalifornien anzutreffen, so z. The mylonitic front is a gradational SW-dipping contact between Tertiary mylonitic gneisses and structurally higher, … the Whipple Mountain Detachment Fault. Download books for free. The absence of a detachment … 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. 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 … Meaning of Detachment fault. My name is Claudia. Le résultat de ces … 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 Il précise alors comment certaines épreuves ont été modifiées, d’autres ajoutées ou retirées. 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). Jane Selverstone. This paper. WikiMatrix. PDF. Download PDF Package. 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. ^Fossen H. (1992). Download Full PDF Package. The role of extensional tectonics in the Caledonides of South Norway. 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) Rapid upward transport of mid-crustal mylonitic gneisses in the footwall of a Miocene detachment fault, Whipple Mountains, southeastern California. These fractionations give mean temperatures that decrease from ∼432°C at 50 meters below the fault … Rapid upward transport of mid-crustal mylonitic gneisses in the footwall of a Miocene detachment fault, Whipple Mountains, southeastern California. Download Free PDF. 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. 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