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![Regional context (A) and study area at Ius Chasma, Mars (B), showing elevations derived from High/Super-Resolution Stereo Camera (HRSC) digital terrain model and unit A (jarosite, yellow), units B and C (opal, light purple), and unit D (polyhydrated sulfates, red). Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) observations included in this study are outlined in black.]()
![(A) Index map across a segment of western Ius Chasma based on Context Camera (CTX) image P05_002815_1720_XN_08S084W. The Ius trough can be divided into the northern and southern subtrough zones divided by the Geryon Montes. See Figure 1C for location. (B) A portion of uninterpreted CTX image P05_002815_1720_XN_08S084W. See A for location. (C) Interpreted geologic map of the northern Ius trough zone based on image shown in B. Detailed lithologic division is shown in map legend and also described in detail in the text. (D) Development of northwest-striking right-slip faults interpreted as a result of bookshelf faulting. (E) Development of northwest-striking right-slip faults interpreted as a result of formation of Riedel shears. See text for details.]()
![(A) Index map across a segment of western Ius Chasma based on Context Camera (CTX) image P05_002815_1720_XN_08S084W. The Ius trough can be divided into the northern and southern subtrough zones divided by the Geryon Montes. See Figure 1C for location. (B) A portion of uninterpreted CTX image P05_002815_1720_XN_08S084W. See A for location. (C) Interpreted geologic map of the northern Ius trough zone based on image shown in B. Detailed lithologic division is shown in map legend and also described in detail in the text. (D) Development of northwest-striking right-slip faults interpreted as a result of bookshelf faulting. (E) Development of northwest-striking right-slip faults interpreted as a result of formation of Riedel shears. See text for details.]()
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![(A) Uninterpreted Context Camera (CTX) image P17_007654_1730_XN_07S080W of the southern trough zone of Ius Chasma. See Figure 12B for location. (B) Detailed geologic map based on interpretation of image in A. Note that the fold train exhibits an oroclinal drag pattern that is indicative of distributed left-slip shear.]()
![Topographic profile of study area, showing Mars Orbiter Laser Altimeter (MOLA) Precision Experiment Data Records (PEDR) track from orbit 20331. Unit A (jarosite, light gray) follows a ledge on the south wall of Ius Chasma. Unit B (opal, dark gray, vertically exaggerated for visibility) forms discontinuous patches. See Figure 1 for profile location.]()
![(A) Topographic expression of the Dead Sea fault zone separating the African plate from Arabian plate. (B) Tectonic map of the Dead Sea fault zone adopted from Ben-Avraham et al. (2008). (C) Drainage pattern on the southern margin of western Ius Chasma. (D) Drainage pattern across the central segment of the Dead Sea rift zone.]()
![(A) Uninterpreted Context Camera (CTX) image P17_007654_1730_XN_07S080W from the southern trough zone of Ius Chasma. See Figure 11A for location. Also shown are locations of C, D, E, and F. (B) Interpreted geologic map based on image shown in A.(C) Rounded patches of broken beds, possibly induced by formation of load structures. (D) Elongated patches, possibly related to fluidized slump structures derived from basin margins. (E) Broken bed blocks in which folded strata are present. This indicates folding occurred before slumping. (F) Angular breccia in the broken bed unit.]()
![(A) Uninterpreted Context Camera (CTX) image P17_007654_1730_XN_07S080W from the southern trough zone of Ius Chasma. See Figure 11A for location. Also shown are locations of C, D, E, and F. (B) Interpreted geologic map based on image shown in A.(C) Rounded patches of broken beds, possibly induced by formation of load structures. (D) Elongated patches, possibly related to fluidized slump structures derived from basin margins. (E) Broken bed blocks in which folded strata are present. This indicates folding occurred before slumping. (F) Angular breccia in the broken bed unit.]()
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![(A) An uninterpreted Context Camera (CTX) image (P05_002815_1720_XN_08S084W) along the northern margin of the northern Ius trough zone. See Figure 5B for location. Small black and white triangles indicate the traces of interpreted left-slip faults. Note that the right-bank risers of a trough-wall canyon on the west side of the image appear to be offset left laterally. This interpretation implies that the curved segments of the faults (i.e., the labeled right-step bend in the figure) trending northwest are thrust faults. Also note that both the northern and southern fault scarps truncate risers in their hanging walls. No corresponding risers can be found in the footwall, which may have been buried by the interpreted thrust or younger sediments in the thrust footwall. The large white triangles also indicate an oblique northwest-trending scarp in the western part of the image. (B) A detailed geologic map based on interpretation of the CTX image shown in A. (C) Uninterpreted image to show a close-up view of the scarp zones along the northern margin of Ius Chasma. See A for location. (D) Interpreted fault map based on image shown in C. Note that the scarp zones consist of an en echelon array of faults, which are interpreted as an extensional fracture implying left-slip motion. (E) Uninterpreted image, with location shown in A. (F) Interpreted geologic relationships adjacent to the western scarp. A west-northwest–trending anticline was recognized based on bedding-dip directions using the rule of V’s. The anticline is bounded by the western scarp along its northern edge. This fault appears to offset a thin and light-toned marker bed left laterally. This same marker bed is offset to the north by a curved fault trace, which is interpreted as a thrust as its fault geometry in map view indicates a low dip angle.]()
![(A) An uninterpreted Context Camera (CTX) image (P05_002815_1720_XN_08S084W) along the northern margin of the northern Ius trough zone. See Figure 5B for location. Small black and white triangles indicate the traces of interpreted left-slip faults. Note that the right-bank risers of a trough-wall canyon on the west side of the image appear to be offset left laterally. This interpretation implies that the curved segments of the faults (i.e., the labeled right-step bend in the figure) trending northwest are thrust faults. Also note that both the northern and southern fault scarps truncate risers in their hanging walls. No corresponding risers can be found in the footwall, which may have been buried by the interpreted thrust or younger sediments in the thrust footwall. The large white triangles also indicate an oblique northwest-trending scarp in the western part of the image. (B) A detailed geologic map based on interpretation of the CTX image shown in A. (C) Uninterpreted image to show a close-up view of the scarp zones along the northern margin of Ius Chasma. See A for location. (D) Interpreted fault map based on image shown in C. Note that the scarp zones consist of an en echelon array of faults, which are interpreted as an extensional fracture implying left-slip motion. (E) Uninterpreted image, with location shown in A. (F) Interpreted geologic relationships adjacent to the western scarp. A west-northwest–trending anticline was recognized based on bedding-dip directions using the rule of V’s. The anticline is bounded by the western scarp along its northern edge. This fault appears to offset a thin and light-toned marker bed left laterally. This same marker bed is offset to the north by a curved fault trace, which is interpreted as a thrust as its fault geometry in map view indicates a low dip angle.]()
![(A) An uninterpreted Context Camera (CTX) image (P05_002815_1720_XN_08S084W) along the northern margin of the northern Ius trough zone. See Figure 5B for location. Small black and white triangles indicate the traces of interpreted left-slip faults. Note that the right-bank risers of a trough-wall canyon on the west side of the image appear to be offset left laterally. This interpretation implies that the curved segments of the faults (i.e., the labeled right-step bend in the figure) trending northwest are thrust faults. Also note that both the northern and southern fault scarps truncate risers in their hanging walls. No corresponding risers can be found in the footwall, which may have been buried by the interpreted thrust or younger sediments in the thrust footwall. The large white triangles also indicate an oblique northwest-trending scarp in the western part of the image. (B) A detailed geologic map based on interpretation of the CTX image shown in A. (C) Uninterpreted image to show a close-up view of the scarp zones along the northern margin of Ius Chasma. See A for location. (D) Interpreted fault map based on image shown in C. Note that the scarp zones consist of an en echelon array of faults, which are interpreted as an extensional fracture implying left-slip motion. (E) Uninterpreted image, with location shown in A. (F) Interpreted geologic relationships adjacent to the western scarp. A west-northwest–trending anticline was recognized based on bedding-dip directions using the rule of V’s. The anticline is bounded by the western scarp along its northern edge. This fault appears to offset a thin and light-toned marker bed left laterally. This same marker bed is offset to the north by a curved fault trace, which is interpreted as a thrust as its fault geometry in map view indicates a low dip angle.]()
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![(A) Global topographic map of Mars and location of Valles Marineris. (B) Topographic map of Valles Marineris and locations of Figures 1C, 28, and 29A. The Ius-Melas-Coprates (IMC) trough zone is bounded by a continuous and nearly linear fault system at the bases of the trough walls. The fault system terminates at northeast-striking normal faults bounding Capri and Eos Chasmata in the east and a complexly extended region across Noctis Labyrinthus and Syria Planum. The Ius-Melas-Coprates trough zone also terminates the north-striking Thaumasia thrust in the south and may have offset the thrust to the north for 150–160 km in a left-lateral sense (see text for detail). Note that Melas Chasma is much wider and its southern rim is higher than the surrounding region. Also note that the eastern part of the Melas depression has a semicircular southern rim. (C) Geologic map of southern Valles Marineris from Witbeck et al. (1991). Locations of detailed study areas described in this study are also shown. Note that the location of the Thaumasia thrust, not mapped by Witbeck et al. (1991), is defined by the Hesperian plain deposits (units Hpl2 and Hpl3) in the west and the Hesperian wrinkle ridge terrane (unit Hr) in the east. This contact, truncated by the Ius-Melas-Coprates trough zone, corresponds to the Thaumasia thrust belt shown in Figure 1B.]()
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Regional context (A) and study area at Ius Chasma, Mars (B), showing elevat... Available to Purchase
in A new type of jarosite deposit on Mars: Evidence for past glaciation in Valles Marineris?
> Geology
Published: 01 November 2014
Figure 1. Regional context (A) and study area at Ius Chasma, Mars (B), showing elevations derived from High/Super-Resolution Stereo Camera (HRSC) digital terrain model and unit A (jarosite, yellow), units B and C (opal, light purple), and unit D (polyhydrated sulfates, red). Compact
Image
(A) Index map across a segment of western Ius Chasma based on Context Camer... Open Access
in Structural analysis of the Valles Marineris fault zone: Possible evidence for large-scale strike-slip faulting on Mars
> Lithosphere
Published: 01 August 2012
Figure 5. (A) Index map across a segment of western Ius Chasma based on Context Camera (CTX) image P05_002815_1720_XN_08S084W. The Ius trough can be divided into the northern and southern subtrough zones divided by the Geryon Montes. See Figure 1C for location. (B) A portion of uninterpreted
Image
(A) Index map across a segment of western Ius Chasma based on Context Camer... Open Access
in Structural analysis of the Valles Marineris fault zone: Possible evidence for large-scale strike-slip faulting on Mars
> Lithosphere
Published: 01 August 2012
Figure 5. (A) Index map across a segment of western Ius Chasma based on Context Camera (CTX) image P05_002815_1720_XN_08S084W. The Ius trough can be divided into the northern and southern subtrough zones divided by the Geryon Montes. See Figure 1C for location. (B) A portion of uninterpreted
Journal Article
A new type of jarosite deposit on Mars: Evidence for past glaciation in Valles Marineris? Available to Purchase
Journal: Geology
Publisher: Geological Society of America
Published: 01 November 2014
Geology (2014) 42 (11): 959–962.
...Figure 1. Regional context (A) and study area at Ius Chasma, Mars (B), showing elevations derived from High/Super-Resolution Stereo Camera (HRSC) digital terrain model and unit A (jarosite, yellow), units B and C (opal, light purple), and unit D (polyhydrated sulfates, red). Compact...
FIGURES
Image
(A) Uninterpreted Context Camera (CTX) image P17_007654_1730_XN_07S080W of ... Open Access
in Structural analysis of the Valles Marineris fault zone: Possible evidence for large-scale strike-slip faulting on Mars
> Lithosphere
Published: 01 August 2012
Figure 13. (A) Uninterpreted Context Camera (CTX) image P17_007654_1730_XN_07S080W of the southern trough zone of Ius Chasma. See Figure 12B for location. (B) Detailed geologic map based on interpretation of image in A. Note that the fold train exhibits an oroclinal drag pattern
Image
Topographic profile of study area, showing Mars Orbiter Laser Altimeter (MO... Available to Purchase
in A new type of jarosite deposit on Mars: Evidence for past glaciation in Valles Marineris?
> Geology
Published: 01 November 2014
Figure 4. Topographic profile of study area, showing Mars Orbiter Laser Altimeter (MOLA) Precision Experiment Data Records (PEDR) track from orbit 20331. Unit A (jarosite, light gray) follows a ledge on the south wall of Ius Chasma. Unit B (opal, dark gray, vertically exaggerated for visibility
Image
(A) Topographic expression of the Dead Sea fault zone separating the Africa... Open Access
in Structural analysis of the Valles Marineris fault zone: Possible evidence for large-scale strike-slip faulting on Mars
> Lithosphere
Published: 01 August 2012
Figure 30. (A) Topographic expression of the Dead Sea fault zone separating the African plate from Arabian plate. (B) Tectonic map of the Dead Sea fault zone adopted from Ben-Avraham et al. (2008) . (C) Drainage pattern on the southern margin of western Ius Chasma. (D) Drainage pattern across
Image
(A) Uninterpreted Context Camera (CTX) image P17_007654_1730_XN_07S080W fro... Open Access
in Structural analysis of the Valles Marineris fault zone: Possible evidence for large-scale strike-slip faulting on Mars
> Lithosphere
Published: 01 August 2012
Figure 12. (A) Uninterpreted Context Camera (CTX) image P17_007654_1730_XN_07S080W from the southern trough zone of Ius Chasma. See Figure 11A for location. Also shown are locations of C, D, E, and F. (B) Interpreted geologic map based on image shown in A.(C) Rounded patches of broken beds
Image
(A) Uninterpreted Context Camera (CTX) image P17_007654_1730_XN_07S080W fro... Open Access
in Structural analysis of the Valles Marineris fault zone: Possible evidence for large-scale strike-slip faulting on Mars
> Lithosphere
Published: 01 August 2012
Figure 12. (A) Uninterpreted Context Camera (CTX) image P17_007654_1730_XN_07S080W from the southern trough zone of Ius Chasma. See Figure 11A for location. Also shown are locations of C, D, E, and F. (B) Interpreted geologic map based on image shown in A.(C) Rounded patches of broken beds
Journal Article
Structural analysis of the Valles Marineris fault zone: Possible evidence for large-scale strike-slip faulting on Mars Open Access
Journal: Lithosphere
Publisher: GSW
Published: 01 August 2012
Lithosphere (2012) 4 (4): 286–330.
...Figure 5. (A) Index map across a segment of western Ius Chasma based on Context Camera (CTX) image P05_002815_1720_XN_08S084W. The Ius trough can be divided into the northern and southern subtrough zones divided by the Geryon Montes. See Figure 1C for location. (B) A portion of uninterpreted...
FIGURES
Image
(A) An uninterpreted Context Camera (CTX) image (P05_002815_1720_XN_08S084W... Open Access
in Structural analysis of the Valles Marineris fault zone: Possible evidence for large-scale strike-slip faulting on Mars
> Lithosphere
Published: 01 August 2012
) A detailed geologic map based on interpretation of the CTX image shown in A. (C) Uninterpreted image to show a close-up view of the scarp zones along the northern margin of Ius Chasma. See A for location. (D) Interpreted fault map based on image shown in C. Note that the scarp zones consist of an en echelon
Image
(A) An uninterpreted Context Camera (CTX) image (P05_002815_1720_XN_08S084W... Open Access
in Structural analysis of the Valles Marineris fault zone: Possible evidence for large-scale strike-slip faulting on Mars
> Lithosphere
Published: 01 August 2012
) A detailed geologic map based on interpretation of the CTX image shown in A. (C) Uninterpreted image to show a close-up view of the scarp zones along the northern margin of Ius Chasma. See A for location. (D) Interpreted fault map based on image shown in C. Note that the scarp zones consist of an en echelon
Image
(A) An uninterpreted Context Camera (CTX) image (P05_002815_1720_XN_08S084W... Open Access
in Structural analysis of the Valles Marineris fault zone: Possible evidence for large-scale strike-slip faulting on Mars
> Lithosphere
Published: 01 August 2012
) A detailed geologic map based on interpretation of the CTX image shown in A. (C) Uninterpreted image to show a close-up view of the scarp zones along the northern margin of Ius Chasma. See A for location. (D) Interpreted fault map based on image shown in C. Note that the scarp zones consist of an en echelon
Journal Article
Long-runout landslides and the long-lasting effects of early water activity on Mars Available to Purchase
Journal: Geology
Publisher: Geological Society of America
Published: 01 February 2015
Geology (2015) 43 (2): 107–110.
... , Hydrated mineral stratigraphy of Ius Chasma, Valles Marineris : Icarus , v. 206 , p. 253 – 268 , doi:10.1016/j.icarus.2009.09.003. Saffer D.M. Marone C. , 2003 , Comparison of smectite- and illite-rich gouge frictional properties: Application to the updip limit of the seismogenic zone...
FIGURES
Journal Article
Diverse mineralogies in two troughs of Noctis Labyrinthus, Mars Available to Purchase
Journal: Geology
Publisher: Geological Society of America
Published: 01 October 2011
Geology (2011) 39 (10): 899–902.
... explanations for a similar doublet found in Ius Chasma, including mixtures of two phases such as montmorillonite or hydrated silica with Fe smectite or jarosite. Spectra of acid-leached Fe smectite ( Madejová et al., 2009 ) and poorly crystalline Fe-SiO 2 -bearing precipitate ( Tosca et al., 2008 ) produced...
FIGURES
Image
(A) Global topographic map of Mars and location of Valles Marineris. (B) To... Open Access
in Structural analysis of the Valles Marineris fault zone: Possible evidence for large-scale strike-slip faulting on Mars
> Lithosphere
Published: 01 August 2012
Figure 1. (A) Global topographic map of Mars and location of Valles Marineris. (B) Topographic map of Valles Marineris and locations of Figures 1C , 28 , and 29A . The Ius-Melas-Coprates (IMC) trough zone is bounded by a continuous and nearly linear fault system at the bases of the trough
Journal Article
Atmospheric origin of Martian interior layered deposits: Links to climate change and the global sulfur cycle Available to Purchase
Journal: Geology
Publisher: Geological Society of America
Published: 01 May 2012
Geology (2012) 40 (5): 419–422.
... Marineris : Icarus , v. 207 , p. 659 – 674 , doi:10.1016/j.icarus.2009.11.029 . Roach L.H. Mustard J.F. Swayze G. Milliken R.E. Bishop J.L. Murchie S.L. Lichtenberg K. , 2010b , Hydrated mineral stratigraphy of Ius Chasma, Valles Marineris : Icarus , v. 206 , p...
FIGURES
Journal Article
Opaline silica in young deposits on Mars Available to Purchase
Journal: Geology
Publisher: Geological Society of America
Published: 01 November 2008
Geology (2008) 36 (11): 847–850.
... are also associated with hydrated sulfates in several locations ( Figs. 2 and 3 ). For example, spectra of deposits adjacent to the hydrated silica south of Ius/Melas Chasma exhibit a broad feature near ~1.95 μm and a narrow OH feature near ~2.26 μm, most consistent with a nonstoichiometric, H 3 O...
FIGURES
Journal Article
Presence of hydrocarbons on Mars: A possibility Open Access
Journal: Environmental Geosciences
Publisher: American Association of Petroleum Geologists
Published: 15 March 2021
Environmental Geosciences (2021) 28 (1): 43–52.
... manifestation of plate tectonics ( Yin, 2012 ). The tectonic model has been interpreted by analyzing the high-resolution thermal emission imaging system, context camera, and High Resolution Imaging Science Experiment images across two trough zones: Ius Chasma in the west and Coprates Chasma in the east along...
Journal Article
Continental-scale salt tectonics on Mars and the origin of Valles Marineris and associated outflow channels Available to Purchase
Journal: GSA Bulletin
Publisher: Geological Society of America
Published: 01 January 2009
GSA Bulletin (2009) 121 (1-2): 117–133.
...–8 km below ( Malin and Edgett, 2000 ; Montgomery and Gillespie, 2005 ; Bigot-Cormier and Montgomery, 2007 ). However, light-toned layered rocks are not restricted to the sides and floors of the chasmata. MOC images at Ius and Candor chasmata within Valles Marineris, as well as Juventae Chasma...
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