detritalPy: A Python‐based toolset for visualizing and analysing detrital geo‐thermochronologic data

Sharman, Glenn R.; Sharman, Jonathan P.; Sylvester, Zoltán

doi:10.1002/dep2.45

Cited by 183 publications

(124 citation statements)

References 37 publications

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“…2) and multidimensional scaling (MDS; Fig. 3; Vermeesch, 2013) plots were generated using detri-talPy (Sharman et al, 2018). Maximum depositional ages (MDAs) were calculated using three techniques: (1) age of the youngest single grain (YSG), (2) weighted mean age of the youngest two grains that overlapped at 1σ [YC1σ(2+)], and (3) weighted mean age of the youngest three grains that overlapped at 2σ ([YC2σ(3+)]; Table DR3).…”

Section: Methodsmentioning

confidence: 99%

The Ancestral Lhasa River: A Late Cretaceous trans-arc river that drained the proto–Tibetan Plateau

Laskowski

Orme

Cai

et al. 2019

Geology

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Late Cretaceous trench basin strata were deposited in the subduction zone that consumed Neo-Tethyan oceanic lithosphere along the southern margin of the proto–Tibetan Plateau. We conducted detrital zircon (DZ) U-Pb geochronology on six trench basin samples (n = 1716) collected near Dênggar, Tibet (∼500 km west of Lhasa), to assess the provenance of these rocks and reconstruct Late Cretaceous sediment transport pathways. They contained DZ ages that point to a unique source around Lhasa city, north of the Late Cretaceous Gangdese magmatic arc. The modern Lhasa River catchment contains the requisite sources, and its main trunk transects the Gangdese magmatic arc, joining with the Yarlung River at a barbed junction at the India-Asia suture. We infer that the Lhasa River is an ancient feature that transported sediment to the subduction zone in Late Cretaceous time and persisted during India-Asia collision.

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Section: Methodsmentioning

confidence: 99%

The Ancestral Lhasa River: A Late Cretaceous trans-arc river that drained the proto–Tibetan Plateau

Laskowski

Orme

Cai

et al. 2019

Geology

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“…Mineral separation and LA-ICP-MS analyses were completed at the UTChron Geo-and Thermochronology facilities at the Jackson School of Geosciences at the University of Texas at Austin following the analytical procedures of Hart et al (2016). Data visualization and plotting were performed using detritalPy (Sharman et al, 2018) python scripts ( Fig. 9) (see Supplemental File S1 [footnote 1]).…”

Section: Analytical Methodologymentioning

confidence: 99%

“…1 Supplemental Material. Zipped file containing Supplemental File S1: A PDF of detailed information regarding the process of data representation and processing involved in the study and three secondary standard concordia age plots, and a tabulated Excel table with secondary standard U-Pb measurements; Supplemental File S2: A PDF file of two sets of maximum depositional age (MDA) measurements of 13 individual samples (MDA plots gathered from detrital zircon [DZ] U-Pb data and processed and plotted in detritalPy [Sharman et al, 2018]); and Supplemental File S3: A tabulated Excel file with 10 tables: Table S1: TSS1 and TSS2 sample U-Pb analyses; Table S2: HF1 and HF2 sample U-Pb analyses; Table S3: WCSS2 sample U-Pb analyses; Table S4: WCSS1 and LSS1 sample U-Pb analyses; Table S5: WSS5 and VSS4 sample U-Pb analyses; Table S6: VSS3 and ALSS1 sample U-Pb analyses; Table S7: VSS1 and VSS2 sample U-Pb analyses; Table S8: Sample locations; Table S9: Sample sheet set up for detritalPy (Sharman et al, 2018); and Table S10: Best age and 1σ error of sample analyses set up for detritalPy (Sharman et al, 2018). Please visit https://doi.org /10.1130 /GES02108.S1 or access the full-text article on www .gsapubs.org to view the Supplemental Material.…”

Section: Core-rim Analysismentioning

confidence: 99%

Orogen proximal sedimentation in the Permian foreland basin

et al. 2020

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The sedimentary fill of peripheral foreland basins has the potential to preserve a record of the processes of ocean closure and continental collision, as well as the long-term (i.e., 107–108 yr) sediment-routing evolution associated with these processes; however, the detrital record of these deep-time tectonic processes and the sedimentary response have rarely been documented during the final stages of supercontinent assembly. The stratigraphy within the southern margin of the Delaware Basin and Marathon fold and thrust belt preserves a record of the Carboniferous–Permian Pangean continental assembly, culminating in the formation of the Delaware and Midland foreland basins of North America. Here, we use 1721 new detrital zircon (DZ) U-Pb ages from 13 stratigraphic samples within the Marathon fold and thrust belt and Glass Mountains of West Texas in order to evaluate the provenance and sediment-routing evolution of the southern, orogen-proximal region of this foreland basin system. Among these new DZ data, 85 core-rim age relationships record multi-stage crystallization related to magmatic or metamorphic events in sediment source areas, further constraining source terranes and sediment routing. Within samples, a lack of Neoproterozoic–Cambrian zircon grains in the pre-orogenic Mississippian Tesnus Formation and subsequent appearance of this zircon age group in the syn-orogenic Pennsylvanian Haymond Formation point toward initial basin inversion and the uplift and exhumation of volcanic units related to Rodinian rifting. Moreover, an upsection decrease in Grenvillian (ca. 1300–920 Ma) and an increase in Paleozoic zircons denote a progressive provenance shift from that of dominantly orogenic highland sources to that of sediment sources deeper in the Gondwanan hinterland during tectonic stabilization. Detrital zircon core-rim age relationships of ca. 1770 Ma cores with ca. 600–300 Ma rims indicate Amazonian cores with peri-Gondwanan or Pan-African rims, Grenvillian cores with ca. 580 Ma rims are correlative with Pan-African volcanism or the ca. 780–560 Ma volcanics along the rifted Laurentian margin, and Paleozoic core-rim age relationships are likely indicative of volcanic arc activity within peri-Gondwana, Coahuila, or Oaxaquia. Our results suggest dominant sediment delivery to the Marathon region from the nearby southern orogenic highland; less sediment was delivered from the axial portion of the Ouachita or Appalachian regions suggesting that this area of the basin was not affected by a transcontinental drainage. The provenance evolution of sediment provides insights into how continental collision directs the dispersal and deposition of sediment in the Permian Basin and analogous foreland basins.

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“…Samples were analyzed at the University of Arizona LaserChron Center by LA‐ICP‐MS (Text S1). Data were visualized using the Python‐based toolset, detritalPy (Sharman et al, ).…”

Section: Methods: Dz Geochronologymentioning

confidence: 99%

“…The durability and widespread occurrence of detrital zircon (DZ) in orogenic belts and sedimentary systems make DZ analysis attractive for studies of paleohydrography and associated tectonic/climatic controls (Cawood et al, ; Romans et al, ), with the database of existing DZ data increasing exponentially since the mid‐1990s (Sharman et al, ; their figure 1). Although sediment provenance data have been an integral component of paleogeographic and sediment routing studies for decades (Dickinson et al, ), the endurance of DZ grains has greatly augmented our ability to assess complex sedimentation patterns and histories, especially those that include sediment recycling and/or long transport distances.…”

Section: Introductionmentioning

confidence: 99%

Orogenic Recycling of Detrital Zircons Characterizes Age Distributions of North American Cordilleran Strata

Schwartz

Weislogel

2019

Tectonics

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Detrital zircon (DZ) analysis has become the standard tool for source-to-sink sediment routing studies at many spatial and temporal scales. In North American source-to-sink studies, DZ distributions are commonly classified according to the presence/absence and proportions of DZ age groups associated with North American crustal provinces as well as peri-Gondwanan and Cordilleran terranes. Although such a classification scheme is descriptive, these age groups typically do not uniquely identify most recent DZ source areas. Using a compilation of >19,000 individual DZ ages for Mesoproterozoic-Paleogene strata of the northern Rocky Mountains, including 2,053 new analyses from the Paleogene Renova Formation and its equivalents in southwestern Montana, we demonstrate periodic derivation of first-cycle DZ from crystalline sources and widespread recycling of poly-cycle DZ from sedimentary sources over multimillion-year timescales. Results show that (1) DZ age distributions become increasingly complex between Mesoproterozoic and Paleogene time with the introduction of new DZ sources to the study area, but (2) once an age group appears in the northern Rocky Mountains stratigraphy, grains of that age persist up-section. These trends show that most DZ age groups are spatiotemporally ubiquitous and nonunique. We largely attribute this to periodic, tectonically induced recycling of DZ into progressively younger sedimentary systems, rather than prolonged derivation of DZ from crystalline basement sources, a trend that reflects the growth of increasingly complex topography associated with the North American Cordillera.

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detritalPy: A Python‐based toolset for visualizing and analysing detrital geo‐thermochronologic data

Cited by 183 publications

References 37 publications

The Ancestral Lhasa River: A Late Cretaceous trans-arc river that drained the proto–Tibetan Plateau

The Ancestral Lhasa River: A Late Cretaceous trans-arc river that drained the proto–Tibetan Plateau

Orogen proximal sedimentation in the Permian foreland basin

Orogenic Recycling of Detrital Zircons Characterizes Age Distributions of North American Cordilleran Strata

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