Multi-stage Laramide deformation in the area of the southern Santa Fe embayment (Rio Grande rift), north-central New Mexico

Lisenbee, Alvis L.

doi:10.1130/2013.2494(10)

Cited by 2 publications

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“…The uplift to the east (i.e., Brazos‐Sangre de Cristo (BSC) Uplift) was a dominant sediment source and Galisteo Basin‐bounding feature throughout most of the depocenter's existence while the western uplift (i.e., NGA Uplift) remained comparatively insignificant until the Eocene. East and northeast of the El Rito and Galisteo depocenters, east‐vergent thrust faults exhumation of the BSC Uplift (Figure c; Baltz, ; Lindsey, ; Lisenbee, ). The Sangre de Cristo portion of the uplift provided sediment to the Vermejo Formation by the early Maastrichtian (Bush, Horton, Murphy, & Stockli, ).…”

Section: Geologic Backgroundmentioning

confidence: 99%

Section: Geologic Backgroundmentioning

confidence: 99%

“…The precise timing of cessation of basement‐involved shortening in north‐central New Mexico is debated (Lisenbee, ). North‐striking dextral faults that cut the Galisteo Formation are interpreted to indicate that north‐northeast shortening‐driven deformation lasted at least until latest Eocene (Erslev, ; Lisenbee, ). Recent mapping of the Espinaso Formation (stratigraphically above the Galisteo Formation) supports even younger basement‐involved shortening in New Mexico (earliest Oligocene), and would therefore overlap with an early phase of late Eocene–early Oligocene volcanism (Lisenbee, ).…”

Section: Geologic Backgroundmentioning

confidence: 99%

“…The role of explosive volcanism is particularly important to sediment character, as distribution of volcanic material over a broad area may have affected drainage networks that would not otherwise contain any upstream volcanic source. Increased volcanic activity resulted in a transition from quartz‐rich to volcaniclastic sedimentation between the Galisteo and Espinaso formations (Lisenbee, ; Smith et al, ; Stearns, ), which occurred at ~38 Ma (Prothero & Lucas, ).…”

Section: Geologic Backgroundmentioning

confidence: 99%

“…RWC ‐Red Wash Canyon, AdC‐ Arroyo del Cobre, TCFS‐Tijeras‐Cañoncito fault system. Uplift geometries and faults modified from Cather () and Lisenbee (). Selected Paleogene sedimentary rock polygons include the El Rito, Galisteo, Diamond Tail, and San Jose formations (after Green & Jones, )…”

Section: Introductionmentioning

confidence: 99%

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Drainage reorganization and Laramide tectonics in north‐central New Mexico and downstream effects in the Gulf of Mexico

et al. 2019

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The El Rito and Galisteo depocenters in north-central New Mexico archive tectonically-driven Paleogene drainage reorganization, the effects of which influenced sedimentation along the northwestern margin of the Gulf of Mexico. Although separated by ~100 km and lacking depositional chronology for the El Rito Formation, the two aforementioned New Mexican depocenters are commonly considered remnants of a single basin with coeval deposition and shared accommodation mechanism. Detrital zircon U-Pb maximum depositional ages indicate that the El Rito and Galisteo formations are not coeval. Moreover, stratigraphic thickness trends and mapping relationships indicate different accommodation mechanisms for the Galisteo and El Rito depocenters; tectonically-induced subsidence versus infilling of incised topography, respectively. The regional unconformity that bounds the base of both the El Rito and Galisteo formations is a correlative surface induced by local tectonic activity and associated drainage reorganization in the early Eocene, and was diachronously buried by northward onlap of fluvial sediments. Detrital zircon distributions in both depocenters indicate increased recycling of Mesozoic strata above the unconformity, but diverge upsection as topographic prominence of local basement-involved uplifts waned. Sediment capture in these depocenters is coeval with deposition in other externally-drained Laramide basins. Further, it corresponds to a period of low Laramide provincederived sediment input and replacement by Appalachian-sourced sediment along the northwestern margin of the Gulf of Mexico during a basin-wide transgression. This illustrates the potential effect that pockets of sediment storage within the catchment of a transcontinental drainage system can have over the sedimentary record in the receiving marine basin. K E Y W O R D S detrital zircon U-Pb, drainage reorganization, Gulf of Mexico, Laramide, stratigraphy 420 | EAGE SMITH eT al.

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Section: Geologic Backgroundmentioning

confidence: 99%

Section: Geologic Backgroundmentioning

confidence: 99%

Section: Geologic Backgroundmentioning

confidence: 99%

Section: Geologic Backgroundmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Drainage reorganization and Laramide tectonics in north‐central New Mexico and downstream effects in the Gulf of Mexico

et al. 2019

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A comprehensive survey of faults, breccias, and fractures in and flanking the eastern Española Basin, Rio Grande rift, New Mexico

et al. 2017

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A comprehensive survey of geologic structures formed in the Earth's brittle regime in the eastern Española Basin and flank of the Rio Grande rift, New Mexico, reveals a complex and protracted record of multiple tectonic events. Data and analyses from this representative rift flank-basin pair include measurements from 53 individual fault zones and 22 other brittle structures, such as breccia zones, joints, and veins, investigated at a total of just over 100 sites. Structures were examined and compared in poorly lithified Tertiary sedi ments, as well as in Paleozoic sedimentary and Proterozoic crystalline rocks. Data and analyses include geologic maps; field observations and measurements; orientation, kinematic, and paleostress analyses; statistical examination of fault trace lengths derived from aeromagnetic data; mineralogy and chemistry of host and fault rocks; and investigation of fault versus bolideimpact hypotheses for the origin of enigmatic breccias found in the Proterozoic basement rocks. Fault kinematic and paleostress analyses suggest a record of transitional, and perhaps partitioned, strains from the Laramide orogeny through Rio Grande rifting. Normal faults within Tertiary basin-fill sediments are consistent with more typical WNW-ESE Rio Grande rift extension, perhaps de coupled from bedrock structures due to strength contrasts favoring the formation of new faults in the relatively weak sediments. Analyses of the fault-length data indicate power-law length distributions similar to those reported from many geologic settings globally. Mineralogy and chemistry in Proterozoic fault-related rocks reveal geochemical changes tied to hydro thermal alteration and nearly isochemical transformation of feldspars to clay minerals. In sediments, faulted minerals are characterized by mechanical entrainment with minor secondary chemical changes. Enigmatic breccias in rift-flanking Protero zoic rocks are autoclastic and isochemical with respect to their protoliths and exist near shatter cones believed to be related to a previously reported pre-Pennsylvanian impact event. A weak iridium anomaly is associated with the breccias as well as adjacent protoliths, thus an impact shock wave cannot be ruled out for their origin. Major fault zones along the eastern rift-flank mountain front are discontinuous and unlikely to impede regional groundwater flow into Española Basin aquifers. The breccia bodies are not large enough to constitute aquifers, and no fault-or breccia-related geochemical anomalies were identified as potential contamination sources for ground or surface waters. The results of this work provide a broad picture of structural diversity and tectonic evolution along the eastern flank of the central Rio Grande rift and the adjacent Española Basin representative of the rift as a whole and many rifts worldwide.

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Multi-stage Laramide deformation in the area of the southern Santa Fe embayment (Rio Grande rift), north-central New Mexico

Cited by 2 publications

References 0 publications

Drainage reorganization and Laramide tectonics in north‐central New Mexico and downstream effects in the Gulf of Mexico

Drainage reorganization and Laramide tectonics in north‐central New Mexico and downstream effects in the Gulf of Mexico

A comprehensive survey of faults, breccias, and fractures in and flanking the eastern Española Basin, Rio Grande rift, New Mexico

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