Provenance of the Ciénaga de Oro Formation: unveiling the tectonic evolution of the Colombian Caribbean margin during the Oligocene - Early Miocene

A stratigraphic section in the San Jacinto fold and thrust belt located at northwestern Colombia was studied. This section displays part of the Oligocene-Early MioceneCiénagade Oro Formation(COF).This work analyses thesedimentsprovenance usinga multi-tool approach which include: (I)conglomerate and sandstonecounting clastwith mesh,(II)heavy mineralsassemblages, (III)paleocurrents and (IV) U/Pb detrital zircon ages.The sedimentary sequence was deposited in deltaic to transitional environment deposition, with reduction in the waves and tidal effect, and increase in the dominance of transitional river processes upward the section. Two main source areas have been identified from a dissected arc province: a main granitic to pegmatitic and a secondary basic igneous source rocks, located to the east and southwest of the current position. Detrital zircon U-Pb geochronology analysis display four age populations: (I) Devonian-Permian, (II) Permian-Triassic, (III) Jurassic and (IV) Cretaceous, with maximum deposition ages of 75.2±0.9 Ma in the lower part of the section, 68.9±0.6 Ma in the middle and 74.5±0.7 Ma for the upper part. It is proposed that COF was sediment-supplied by a south-to-north fluvial system, which drained exposed basement blocks and their late Cretaceous to Paleogene sedimentary cover during the Oligocene. This fluvial system carried sediments from late Cretaceous plutonslike the AntioqueñoBatholith and mafic/ultramafic rocks, which make up the basement of the Western and Central Cordilleras

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Late Cretaceous-Paleocene stratigraphic and structural evolution of the central Mexican fold and thrust belt, from detrital zircon (U-Th)/(He-Pb) ages

Journal of South American Earth Sciences ◽

10.1016/j.jsames.2019.102264 ◽

2019 ◽

Vol 95 ◽

pp. 102264 ◽

Cited By ~ 2

Author(s):

Edgar Juárez-Arriaga ◽

Timothy F. Lawton ◽

Daniel F. Stockli ◽

Luigi Solari ◽

Uwe Martens

Keyword(s):

Late Cretaceous ◽

Detrital Zircon ◽

Structural Evolution ◽

Thrust Belt ◽

Fold And Thrust Belt

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Sources of placer platinum in Yukon: provenance study from detrital minerals

Canadian Journal of Earth Sciences ◽

10.1139/e08-032 ◽

2008 ◽

Vol 45 (8) ◽

pp. 879-896 ◽

Cited By ~ 2

Author(s):

Yana Fedortchouk ◽

William LeBarge

Keyword(s):

Unknown Origin ◽

Heavy Mineral ◽

Source Rocks ◽

Ultramafic Rocks ◽

Chromian Spinel ◽

Mafic Intrusions ◽

Platinum Group Minerals ◽

Mineral Sample ◽

Back Arc ◽

Ocean Ridge

Source rocks for the platinum group minerals (PGM), historically reported in a number of Yukon placers, remain either unknown or poorly understood. A study of heavy-mineral samples from five creeks draining bedrock in west and central Yukon was undertaken to confirm the presence of placer platinum, to determine which mafic–ultramafic rock is the source of PGM in Kluane area, southern Yukon, and to explain platinum occurrences in Canadian and Florence creeks, central Yukon, where no known mafic–ultramafic rocks are present. Diverse composition of chromian spinel and clinopyroxenes from three creeks in the Kluane area indicate several sources of ultramafic rocks, including fragments of Alpine-type peridotites formed in back-arc basin and mid-ocean-ridge settings, and a source rock for zoned zinc-rich chromites of unknown origin. The Kluane ultramafic sills are the most likely source of PGM in this area. The heavy-mineral sample from Canadian Creek returned one PGM grain, no chromite, and abundant ilmenite and titanomagnetite. A group of chromium-rich magnesian ilmenites (∼4 wt.% MgO) closely match the composition of ilmenites from continental mafic intrusions produced during continental rift magmatism. This supports the continental rifting event recently proposed for this part of Yukon and indicates the economic potential of the Canadian Creek platinum occurrence. Composition of spinel from Florence Creek sample indicates an Alaskan-type intrusion as the source of PGM.

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Tectonic influence on axial-transverse sediment routing in the Denver Basin

10.1130/2021.2555(11) ◽

2022 ◽

Author(s):

Glenn R. Sharman ◽

Daniel F. Stockli ◽

Peter Flaig ◽

Robert G. Raynolds ◽

Marieke Dechesne ◽

...

Keyword(s):

Late Cretaceous ◽

Detrital Zircon ◽

Foreland Basin ◽

The Other ◽

Front Range ◽

Denver Basin ◽

Dispersal Patterns ◽

Magmatic Arc ◽

Sedimentary Sequences ◽

Basin Fill

ABSTRACT Detrital zircon U-Pb and (U-Th)/He ages from latest Cretaceous–Eocene strata of the Denver Basin provide novel insights into evolving sediment sourcing, recycling, and dispersal patterns during deposition in an intracontinental foreland basin. In total, 2464 U-Pb and 78 (U-Th)/He analyses of detrital zircons from 21 sandstone samples are presented from outcrop and drill core in the proximal and distal portions of the Denver Basin. Upper Cretaceous samples that predate uplift of the southern Front Range during the Laramide orogeny (Pierre Shale, Fox Hills Sandstone, and Laramie Formation) contain prominent Late Cretaceous (84–77 Ma), Jurassic (169–163 Ma), and Proterozoic (1.69–1.68 Ga) U-Pb ages, along with less abundant Paleozoic through Archean zircon grain ages. These grain ages are consistent with sources in the western U.S. Cordillera, including the Mesozoic Cordilleran magmatic arc and Yavapai-Mazatzal basement, with lesser contributions of Grenville and Appalachian zircon recycled from older sedimentary sequences. Mesozoic zircon (U-Th)/He ages confirm Cordilleran sources and/or recycling from the Sevier orogenic hinterland. Five of the 11 samples from syn-Laramide basin fill (latest Cretaceous–Paleocene D1 Sequence) and all five samples from the overlying Eocene D2 Sequence are dominated by 1.1–1.05 Ga zircon ages that are interpreted to reflect local derivation from the ca. 1.1 Ga Pikes Peak batholith. Corresponding late Mesoproterozoic to early Neoproterozoic zircon (U-Th)/He ages are consistent with local sourcing from the southern Front Range that underwent limited Mesozoic–Cenozoic unroofing. The other six samples from the D1 Sequence yielded detrital zircon U-Pb ages similar to pre-Laramide units, with major U-Pb age peaks at ca. 1.7 and 1.4 Ga but lacking the 1.1 Ga age peak found in the other syn-Laramide samples. One of these samples yielded abundant Mesozoic and Paleozoic (U-Th)/He ages, including prominent Early and Late Cretaceous peaks. We propose that fill of the Denver Basin represents the interplay between locally derived sediment delivered by transverse drainages that emanated from the southern Front Range and a previously unrecognized, possibly extraregional, axial-fluvial system. Transverse alluvial-fluvial fans, preserved in proximal basin fill, record progressive unroofing of southern Front Range basement during D1 and D2 Sequence deposition. Deposits of the upper and lower D1 Sequence across the basin were derived from these fans that emanated from the southern Front Range. However, the finer-grained, middle portion of the D1 Sequence that spans the Cretaceous-Paleogene boundary was deposited by both transverse (proximal basin fill) and axial (distal basin fill) fluvial systems that exhibit contrasting provenance signatures. Although both tectonic and climatic controls likely influenced the stratigraphic development of the Denver Basin, the migration of locally derived fans toward and then away from the thrust front suggests that uplift of the southern Front Range may have peaked at approximately the Cretaceous-Paleogene boundary.

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Revised stratigraphy of the Mesozoic rocks of southern Cyprus

Geological Magazine ◽

10.1017/s0016756800028892 ◽

1980 ◽

Vol 117 (6) ◽

pp. 547-563 ◽

Cited By ~ 40

Author(s):

R. E. Swarbrick ◽

A. H. F. Robertson

Keyword(s):

Oceanic Crust ◽

Continental Margin ◽

Late Cretaceous ◽

Sedimentary Cover ◽

Igneous Rocks ◽

Late Triassic ◽

Metamorphic Rocks ◽

Southern Cyprus

SummaryRecent resurgence of interest in the Mesozoic rocks of SW and southern Cyprus necessitates redefinition of the Mesozoic sedimentary and igneous rocks in line with modern stratigraphical convention. Two fundamentally different rocks associations are present, the Troodos Complex, not redefined, a portion of late Cretaceous oceanic crust, and the Mamonia Complex, the tectonically dismembered remnants of a Mesozoic continental margin. Based on earlier work, the Mamonia Complex is divided into two groups, each subdivided into a number of subsidiary formations and members. The Ayios Photios Group is wholly sedimentary, and records the evolution of a late Triassic to Cretaceous inactive continental margin. The Dhiarizos Group represents Triassic alkalic volcanism and sedimentation adjacent to a continental margin. Several other formations not included in the two groups comprise sedimentary mélange and metamorphic rocks. The Troodos Complex possesses an in situ late Cretaceous sedimentary cover which includes two formations of ferromanganiferous pelagic sediments, radiolarites and volcaniclastic sandstones. The overlying Cainozoic calcareous units are not redefined here.

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Simulating the timing of petroleum generation and expulsion from deltaic source rocks: Implications for Late Cretaceous petroleum system in the offshore Jiza-Qamar Basin, Eastern Yemen

Journal of Petroleum Science and Engineering ◽

10.1016/j.petrol.2018.06.076 ◽

2018 ◽

Vol 170 ◽

pp. 620-642 ◽

Cited By ~ 6

Author(s):

Mohammed Hail Hakimi ◽

Abdulwahab S. Alaug ◽

Abdulghani F. Ahmed ◽

Madyan M.A. Yahya ◽

Mohamed M. El Nady ◽

...

Keyword(s):

Late Cretaceous ◽

Petroleum System ◽

Source Rocks ◽

Petroleum Generation

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Double dating (U–Pb and (U–Th)/He) of detrital zircon from the Gonfolite Group (European Alps) and implications for the lag-time approach to detrital thermochronology

10.5194/egusphere-egu21-2608 ◽

2021 ◽

Author(s):

Marco G. Malusà ◽

Owen A. Anfinson ◽

Daniel F. Stockli

Keyword(s):

Detrital Zircon ◽

Country Rock ◽

Lag Time ◽

Source Rocks ◽

Magmatic Zircon ◽

Contact Aureole ◽

European Alps ◽

Earth Planet ◽

Shallow Level ◽

Plutonic Rocks

Detrital thermochronologic analyses are increasingly employed to develop quantitative models of landscape evolution and constrain rates of exhumation due to erosion. Crucial for this kind of application is a correct discrimination between thermochronologic ages that record cooling due to exhumation, i.e., the motion of parent rocks towards Earth&#8217;s surface, and thermochronologic ages that record cooling independent from exhumation, as expected for example in volcanic and shallow-level plutonic rocks. A suitable approach for the identification of magmatic crystallization ages is provided by double dating, which combines for example U&#8211;Pb and (U&#8211;Th)/He analyses of the same mineral grain. Magmatic zircon crystallized from volcanic or shallow-level plutonic rocks should display identical U&#8211;Pb and (U&#8211;Th)/He (ZHe) ages within error, because of rapid magma crystallization in the upper crust where country rocks are at temperatures cooler than the partial retention zone of the ZHe system. Conversely, zircon grains crystallized at greater depth and recording cooling during exhumation should display ZHe ages younger than the corresponding U&#8211;Pb ages. These latter ZHe ages may constrain the long-term exhumation history of the source rocks according to the lag-time approach, provided that a range of assumptions are properly evaluated (e.g., Malus&#224; and Fitzgerald 2020). Here, we explore the possibility that detrital zircon grains yielding ZHe ages younger than the corresponding U&#8211;Pb ages may record country-rock cooling within a contact aureole rather than exhumation. To tackle this issue, we applied a double-dating approach including U-Pb and ZHe analyses to samples of the Gonfolite Group exposed south of the European Alps. The Gonfolite Group largely derives from erosion of the Bergell volcano-plutonic complex and adjacent country rocks, and its mineral-age stratigraphy is extremely well constrained (Malus&#224; et al. 2011, 2016). Analyses were performed in the UTChron Geochronology Facility at University of Texas at Austin. For U-Pb LA-ICPMS depth-profile analysis, all detrital zircon grains were mounted without polishing, which allowed for subsequent ZHe analysis on the same grains. Zircon for ZHe analyses were selected among those not derived from the Bergell complex or other Periadriatic magmatic rocks, as constrained by their U-Pb age. We found that ca 40% of double-dated grains, despite yielding a ZHe age younger than their U-Pb age, likely record cooling within the Bergell contact aureole, not exhumation. These findings have major implications for a correct application of the lag-time approach to detrital thermochronology and underline the importance of a well-constrained mineral-age stratigraphy for a reliable geologic interpretation.Malus&#224; MG, Villa IM, Vezzoli G, Garzanti E (2011) Earth Planet Sci Lett 301(1-2), 324-336Malus&#224; MG, Anfinson OA, Dafov LN, Stockli DF (2016) Geology 44(2), 155-158Malus&#224; MG, Fitzgerald, PG (2020) Earth-Sci Rev 201, 103074

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Anabar-Lena Composite Tectono-Sedimentary Element, Northern East Siberia

Geological Society London Memoirs ◽

10.1144/m57-2021-29 ◽

2021 ◽

pp. M57-2021-29

Author(s):

A.K. Khudoley ◽

S.V. Frolov ◽

G.G. Akhmanov ◽

E.A. Bakay ◽

S.S. Drachev ◽

...

Keyword(s):

Late Cretaceous ◽

Oil And Gas ◽

Foreland Basin ◽

Early Carboniferous ◽

Passive Margin ◽

Source Rocks ◽

East Siberia ◽

Lena River ◽

Petroleum Systems ◽

Intracratonic Basin

AbstractAnabar-Lena Composite Tectono-Sedimentary Element (AL CTSE) is located in the northern East Siberia extending for c. 700 km along the Laptev Sea coast between the Khatanga Bay and Lena River delta. AL CTSE consists of rocks from Mesoproterozoic to Late Cretaceous in age with total thickness reaching 14 km. It evolved through the following tectonic settings: (1) Meso-Early Neoproterozoic intracratonic basin, (2) Ediacaran - Early Devonian passive margin, (3) Middle Devonian - Early Carboniferous rift, (4) late Early Carboniferous - latest Jurassic passive margin, (5) Permian foreland basin, (6) Triassic to Jurassic continental platform basin and (7) latest Jurassic - earliest Late Cretaceous foreland basin. Proterozoic and lower-middle Paleozoic successions are composed mainly by carbonate rocks while siliciclastic rocks dominate upper Paleozoic and Mesozoic sections. Several petroleum systems are assumed in the AL CTSE. Permian source rocks and Triassic sandstone reservoirs are the most important play elements. Presence of several mature source rock units and abundant oil- and gas-shows (both in wells and in outcrops), including a giant Olenek Bitumen Field, suggest that further exploration in this area may result in economic discoveries.

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