Detrital zircon record of magmatism and sediment dispersal across the North American Cordilleran arc system (28–48°N)

Schwartz, Theresa; Surpless, Kathleen D.; Colgan, Joseph P.; Johnstone, Samuel A.; Holm-Denoma, Christopher S.

doi:10.1016/j.earscirev.2021.103734

Cited by 17 publications

(10 citation statements)

References 210 publications

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“…147 Ma grains from the Mojave region. The lack of young arc ages in the most Sevier‐proximal foreland strata may be due to the development of the broad topographic barrier of the fold‐and‐thrust belt at that time, which may have blocked significant ashfall to the proximal foreland (Figure 7; Schwartz et al, 2021). Ultimately, the predominance of zircons derived from the Cordilleran magmatic arc and Mogollon Highlands suggests that much of the sediment was transported ca.…”

Section: Discussionmentioning

confidence: 99%

“…In contrast, samples from southwest Utah strata closest to the magmatic arc (e.g., Gunlock, Pine Valley Mountains) have the least number of arc‐related grains, with the exception of Parowan Gap (Figure 4c; Anderson & Dinter, 2010; Eaton, 1999; Eaton et al, 2002). This preferential deposition of arc‐related grains distal from the Sevier fold‐thrust belt is unusual and could be a result of preferential axial fluvial transport and redeposition of Mojave‐related zircon grains into the distal foredeep combined with widening of the fold‐thrust belt, thus preventing deposition of ash fall into the proximal foreland (Schwartz et al, 2021).…”

Section: Source Area Interpretationmentioning

confidence: 99%

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Challenging assumptions of sediment routing in retroarc foreland basins: Detrital zircon evidence for axial versus transverse drainages in the Late Cretaceous of southern Utah, USA

Pierre

Johnson

2022

Basin Research

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Depositional models for retroarc foreland basin systems commonly imply a direct link between thrust belt dynamics and sediment supply, despite documented complexity between orogen‐transverse and orogen‐parallel (axial) sediment routing systems. Previous detrital zircon provenance studies from the Straight Cliffs Formation in the Kaiparowits Plateau of southern Utah indicate primary axial source areas to the south (Mogollon Highlands), and southwest (Cordilleran magmatic arc), with relatively minor transverse input from the Sevier fold‐thrust belt to the west. Complementary data from 32 new samples are presented to investigate whether these trends persist in correlated strata from sections most proximal to the active fold‐thrust belt, as well as strata proximal to the Mogollon Highlands. This study aims to improve statistical robustness through higher‐n datasets (>300 analyses/sample) and addresses the possibility of recycling of zircon grains from strata in the exhumed Sevier fold‐thrust belt. Based on this provenance dataset, we infer that orogen‐transverse deposition was mainly limited to the most proximal sections (within ca. 75 km of the fold‐thrust belt), but included episodic distribution across the foredeep that was associated with distinct intervals of widespread amalgamated sand and gravel sheet deposits. In contrast, more distal parts of the foredeep record long‐distance fluvial transport (>400 km) of zircons from the active Cordilleran magmatic arc as well as Yavapai‐Mazatzal basement rocks in central Arizona (the Mogollon Highlands). Palaeogeographic reconstructions suggest the apex of a large basin‐axial fluvial system may have been located at the structural syntaxis between the Sevier fold‐thrust belt and western margin of the Mogollon Highlands. This interpretation is supported by detrital zircon data presented here, thus extending the possibility that the Palaeogene ‘California River’ may have existed by at least Late Cretaceous time. Ultimately, these data point to extrabasinal controls on sediment supply, which was largely decoupled from flexural accommodation controls in this archetype retroarc foreland basin.

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Section: Discussionmentioning

confidence: 99%

Section: Source Area Interpretationmentioning

confidence: 99%

Challenging assumptions of sediment routing in retroarc foreland basins: Detrital zircon evidence for axial versus transverse drainages in the Late Cretaceous of southern Utah, USA

Pierre

Johnson

2022

Basin Research

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“…Rosenblume et al, 2021). For first‐cycle sources, we were unable to include U‐Pb age composites in the mixture models because data from igneous rocks are typically high‐precision, low‐n ages, which may not be accurately reflected in the detrital zircon record (Schwartz et al, 2021). As such, our mixture models primarily focus on the older, recycled age fraction.…”

Section: Interpretationsmentioning

confidence: 99%

Middle Albian provenance, sediment dispersal and foreland basin dynamics in southwestern Montana, North American Cordillera

et al. 2022

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The Lower Cretaceous Blackleaf Formation in southwestern Montana records sedimentation in the Idaho‐Montana retroforeland basin of the North American Cordillera. Regional‐scale sedimentology suggests that during Albian time southwestern Montana was partially flooded by an early marine incursion of the Western Interior Seaway during deposition of the Blackleaf Formation. We use sandstone petrography, large‐n (n = 600) U‐Pb detrital zircon geochronology and mixture modelling to determine the provenance of these strata. Our analysis suggests three distinct provenance groups: Group 1 sandstones occur in the eastern region of the study area, are quartz‐rich and have zircon age‐probability peaks of ca. 110, 160, 420–450, 1050 and 1160 Ma; these sandstones match with a primarily Appalachian provenance. Group 2 sandstones occur in the western region of study area, are lithic‐rich and have peaks of ca. 110, 160, 1780, 1840, 1920, 2080 and 2700 Ma; the primary source for these sandstones was exhumed lower‐middle Palaeozoic strata from the Idaho sector of the Sevier belt. Group 3 sandstones occur in the western region of the study area, are lithic‐rich and have prominent peaks of ca. 115, 170, 430, 600, 1085, 1170, 1670 and 1790 Ma; the primary source for these sandstones was exhumed Triassic‐upper Palaeozoic strata from the Idaho sector of the Sevier belt. Our provenance data record a sharp change that coincides with the western shoreline of the seaway, and we infer that it may indicate the position of an irregular, submarine forebulge depozone influenced by dynamic subsidence during a period of reduced thrusting in the adjacent fold‐thrust belt. Albian‐aged sediments in southwestern Montana were delivered by rivers with headwaters in the Sevier belt as well as transcontinental river systems with headwaters in eastern North America. In southwestern Montana, west‐flowing transcontinental fluvial systems were flooded by the Western Interior Seaway as it encroached from the north.

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“…Despite this bias, some of the volcanic arc's older record can be preserved in adjacent basins and their study can provide additional insights into the magmatic system (Barth et al., 2013; Malusà et al., 2011; McKenzie et al., 2018; Schwartz et al., 2021; Yang et al., 2012). Magmatic zircons provide the isotopic and chemical composition of the system at the time of their crystallization (Cavosie et al., 2005; Grimes et al., 2015; Vervoort et al., 2004).…”

Section: Introductionmentioning

confidence: 99%

Diverse Magmatic Evolutionary Trends of the Northern Andes Unraveled by Paleocene to Early Eocene Detrital Zircon Geochemistry

Jaramillo

Zapata

Carvalho

et al. 2022

Geochem Geophys Geosyst

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The Paleocene‐early Eocene continental magmatic arc (PECMA) in the Northern Andes is an example of arc magmatism following a major collisional event. This arc formed after the arc‐continent collision between the Caribbean Plate and the South American continental margin at ca. 72 Ma. We used detrital zircon LA‐ICP‐MS and CA‐ID‐TIMS geochronology and geochemistry to complement the limited plutonic record of the PECMA and better characterize the PECMA's magmatic evolution. Zircon geochronology and their respective trace element geochemistry were analyzed from Paleocene‐early Eocene strata of the Bogotá Formation in the foreland region. Our results show that after the collision of the Caribbean Plate, the magmas in the PECMA differentiated under a thick continental crust with limited subduction input at ca. 66 Ma. By 62–50 Ma, scattered patterns of Hf, U, U/Yb, and Yb/Gd ratios in detrital zircons suggest the existence of contrasting magmatic inputs attributed to different depths of crustal fractionation, varied temperatures of crystallization, and significant mantle and subduction inputs. These diverse magmatic patterns reflect the evolution of the continental crust. We proposed that oblique convergence and strike‐slip tectonics favored contrasting crustal architectures along the continental margin while local lithosphere dripping from a previously thickened crust promoted the formation of hot magmas under a thick continental crust.

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Detrital zircon record of magmatism and sediment dispersal across the North American Cordilleran arc system (28–48°N)

Cited by 17 publications

References 210 publications

Challenging assumptions of sediment routing in retroarc foreland basins: Detrital zircon evidence for axial versus transverse drainages in the Late Cretaceous of southern Utah, USA

Challenging assumptions of sediment routing in retroarc foreland basins: Detrital zircon evidence for axial versus transverse drainages in the Late Cretaceous of southern Utah, USA

Middle Albian provenance, sediment dispersal and foreland basin dynamics in southwestern Montana, North American Cordillera

Diverse Magmatic Evolutionary Trends of the Northern Andes Unraveled by Paleocene to Early Eocene Detrital Zircon Geochemistry

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