Mechanism of Carboniferous-Permian transgression/regression in the east Ordos basin and associated paleoecological variability: Insight from detrital geochronology and palaeontology data

2020 ◽  
Author(s):  
Chao Fu ◽  
Xinghe Yu ◽  
Marc Jolivet ◽  
Shunli Li ◽  
Zixiao Peng ◽  
...  
Keyword(s):  
North China ◽  
Ordos Basin ◽  
Second Order ◽  
Sediment Supply ◽  
Late Carboniferous ◽  
Coarse Grained ◽  
Early Permian ◽  
The South ◽  
The North ◽  
Facies Associations

<p>Developed on the North China Craton, the intra-cratonic Ordos basin contains a complete Paleozoic to Cenozoic sediment record allowing long-term paleo-environmental and climate change investigation. During the Carboniferous-the early Permian period, convergence between the North China block and the paleo-Yangtze plate to the south lead to a general marine regression characterised by a series of second-order transgression/regression cycles diachronous along the eastern margin of the Ordos. However, the detailed mechanisms that induced these cycles, as well as the associated paleoecological changes, are still unknown. In this study, we integrated the description of numerous core samples with electric-log data and 2-D seismic data to reconstruct the sediment facies associations across the first-order regression from the Carboniferous tidal flat depositional system to the early Permian prograding fluvial delta system. δ<sup>18</sup>O, δ<sup>13</sup>C and clay content (w(Illite + Kaolinite)/w(smectite) ratio) stratigraphic variations were then used to reconstruct the paleo-sea level from the late Carboniferous to the early Permian. We conclude that the direction of second-order transgression/regression mainly stroke to the east during the late Carboniferous and switched clockwise towards the north during the early Permian. We suggest that the variability of the second-order cycles, diachronous in space and time was mainly linked to local variations in sediment supply and regional uplift.  Using detrital zircon U-Pb data, major and trace elements content and heavy minerals assemblages (HMA), we estimated the sediment provenance area. The sediment volumes deposited in the basin through time were obtained using 3Dseismic data. During the Carboniferous, the coarse-grained sediments deposited in the eastern Ordos were derived from the uplifting Helan Mountain. By the early Permian, the detrital material became multi-sourced issuing from both the Yinshan range to the north and the Qinling range to the south. During the first stage, regression was controlled by regional uplift, while the sediment supply controlled the second stage. Indeed, based on sediment dispersal volume calculation, we can infer that the sediment supply during the early Permian was more extensive than during the Late Carboniferous – early Permian. We correlate this observation to a more humid climate during the early Permian: multi- paleoecological indexes, including the sporopollenin content and microsomal type assemblage, suggest that glaciation prevailed during the Late Carboniferous – early Permian shallow-marine stage. In contrast, the early Permian alluvial and deltaic series were deposited under a warmer, interglacial climate (Sakmarian). Finally, the typical interglacial coal accumulation pattern occurs earlier than the Pennsylvanian–Permian transition it characterises around the world (Artinskian).</p>

scholarly journals Permian

1982 ◽  
Vol 8 ◽  
pp. 28-32
Author(s):  
Fritz Lyngsie Jacobsen ◽  
Jørgen Gutzon Larsen
Keyword(s):  
North Sea ◽  
Initial Phase ◽  
Late Carboniferous ◽  
Early Permian ◽  
The South ◽  
Permian Basin ◽  
Red Beds ◽  
North West ◽  
The North

In North-West Europe two mega-basins began their development during Late Carboniferous to Early Permian: The South Permian Basin stretching from eastern England into Poland , and the North Permian Basin reaching from Scotland into Denmark. These two basins were separated by the Mid North Sea High and the Ringkøbing-Fyn High which came into existence early in Permian. The initial phase of subsidence was accompanied by extensive subaerial volcanism. This was followed by a period of oxidation and erosion under desert conditions and deposition of red beds and sabkha sediments in the two Permian basins (fig. 19). These rocks are included in the Rotliegendes Group as originally established by Werner (1786). Continuous subsidence and transgression of the sea, but with a restricted connection to the ocean, lead to the formation of the evaporites of the Zechstein Group.

Late Carboniferous-Early Permian Sequence Stratigraphy and Depositional Evolution in the Northeast Ordos Basin, North China

2010 ◽  
Vol 84 (5) ◽  
pp. 1220-1228 ◽  
Author(s):  
YANG Minghui ◽  
LIU Chiyang ◽  
LAN Chaoli ◽  
LIU Le ◽  
LI Xin ◽  
...  
Keyword(s):  
Sequence Stratigraphy ◽  
North China ◽  
Ordos Basin ◽  
Late Carboniferous ◽  
Early Permian ◽  
Depositional Evolution

scholarly journals SEDIMENTOLOGY AND SEQUENCE STRATIGRAPHY OF SHALLOW MARINE SEDIMENTS IN A SYN-RIFT SETTING: HUGIN FORMATION, SOUTH VIKING GRABEN

2018 ◽  
Author(s):  
Rachel Kieft ◽  
Christopher Aiden-Lee Jackson ◽  
Gary J. Hampson
Keyword(s):  
Sequence Stratigraphy ◽  
Structural Features ◽  
Sediment Supply ◽  
Structural Development ◽  
The South ◽  
Candidate Sequence ◽  
Shallow Marine ◽  
The North ◽  
Facies Associations ◽  
The Impact

Fault growth and linkage within rift basins generates localised uplift and subsidence, which may exert significant control over syn-rift sedimentation. The shallow-marine Hugin Formation within the South Viking Graben, a salt-influenced rift basin, is studied as an example of such sedimentation. The principal aims of this thesis are to: (1) characterise the sedimentology and sequence stratigraphy of the succession, (2) investigate structural development within the graben by analysis of the hangingwall dipslope, and (3) establish the impact of syn-depositional structural development on shallow marine sedimentation. Sedimentological analysis of the Hugin Formation has recognised fifteen facies that are grouped into six facies associations: bay-fill, shoreface, fluvio-tidal channel fill, mouth bar, coastal plain and offshore open marine. Combining the results of this analysis with biostratigraphy, the studied succession is subdivided into a series of units delineated by regionally correlatable maximum flooding surfaces. Within the stratigraphic framework delineated by these surfaces each of the main facies associations are developed coevally in distinct and different geographical locations. Higher order flooding surfaces, transgressive surfaces and candidate sequence boundaries can also be interpreted within this framework which are geographically localised. Structural analysis of the hangingwall dipslope identified a series of distinct structural features that were evolving contemporaneous with Hugin Formation deposition. To the north, the gravity-driven Gudrun-Brynhild fault array initiated as a series of distinct segments which subsequently propagated and linked. Further south, the salt-cored highs at Dagny and Alpha Central were also developing. Palaeogeographical localisation of facies associations is interpreted to reflect deposition within these different structural locations along with proximity to the axial fluvial feeder system to the south of the basin. Sediment supply via wave-driven longshore drift from the north of the basin and local re-working of structurally controlled palaeohighs was also important.

Relationships between tectonics and sedimentation on the northeastern margin of the Subpyrenean trough during the late Santonian

2005 ◽  
Vol 176 (5) ◽  
pp. 443-455 ◽  
Author(s):  
Michel Bilotte ◽  
Laurent Koess ◽  
Elie-Jean Debroas
Keyword(s):  
Debris Flows ◽  
Major Change ◽  
Sediment Supply ◽  
Coarse Grained ◽  
Fault System ◽  
The South ◽  
Delta Front ◽  
Eastern Area ◽  
The North ◽  
Sedimentary Evolution

Abstract In the eastern part of the Aquitaine Basin and to the south of the Toulouse high, the Subpyrenean trough is a narrow trench oriented N110°E to N130° E. The deposits on the northeastern side of this depression are preserved in the autochthonous Mesozoic cover of the Variscan Mouthoumet Massif, but also in the parautochthonous or allochthonous tectonic units that fringe to the north (Camps – Peyrepertuse slice, fig. 2) the North Pyrenean frontal thrust. From the Middle Cenomanian to the Lower Santonian included (96 to 85 Ma ago), the sedimentation in the Mouthoumet Massif indicates shallow marine carbonate or mixed (carbonate to terrigenous) conditions. The different facies depend mainly on two parameters : the variations of the accommodation space for sedimentation and the location of the numerous rudist buildups. The deposits are first organized in a homoclinal ramp until the Turonian. From the Coniacian up to the early Santonian, drowned platform patterns prevail. During the late Santonian and more precisely around 85 Ma with an other event around 84 Ma, the Mouthoumet Massif and its cover broke up under tectonic stresses. Positive and negative topographies reactivate the Variscan fault system. Platform – slope/basin morphologies substituted the preceeding ramp and drowned platform morphology. Looking to the south and in the direction N120°E, the distal slope received gravitational and turbiditic sediments called the Grès de Labastide (fig. 7). The sediment supply shifted from north to south and from east to west. To the north of this slope, the platform itself broke up into a mosaic of rhomboedric blocks, leading to a graben and horst morphology. Those units are clearly different according to the character of their sedimentary facies, deltaic or reefal (Montagne des Cornes, Calcaires de Camps – Peyrepertuse). The detailed stratigraphic and sedimentologic studies of some of these systems reveal a tectono-sedimentary evolution involving two successive cycles Ss1 (lower Upper Santonian) and Ss2 (Uppermost Santonian). In the western part of the Mouthoumet Massif this cyclic evolution is recorded from south to north, on the Parahou slope, the Rennes-les-Bains graben and the Bugarach horst. The lower cycle Ss1, located on the Rennes-les-Bains graben, is approximatively 85 Ma to 84 Ma in age. It starts with reworked deposits (lowstand systems tract) made up of sometimes several m3 elements derived from former sedimentary deposits (from Turonian up to Lower Santonian) even when the same deposits are in place on the adjacent horsts (e.g. the eastern horst of Bugarach). Those reworked deposits fill the bottom of the graben, principally in the transit zones (debris-flows of the Conglomerat de la Ferrière), or in the Parahou slope (slumps and debris-flows of the Cascade des Mathieux); then the deltaic complex of Rennes-les-Bains covers the older chaotic deposits; the blue marls and the overlying sandy facies (transgressive and highstand systems tracts) related to prodelta and deltafront deposits represent the infilling of the Rennes-les Bains graben. The upper cycle Ss2 developed probably between 84 Ma to 83,5 Ma; its geographical extension overlaps the limits of the lower cycle (e.g. the Bugarach horst), but its sedimentary organisation is still the same including: on the Parahou slope debris-flow and intrabasinal reworking (Conglomérat des Gascous: lowstand systems tract); on the northern platform transgressive and highstand systems tracts, present in the Montagne des Cornes delta where the Marnes bleues de Sougraigne represent the prodelta deposits, and the terrigenous and rudist buildups of the delta front deposits (fig.7). The final infilling results from the spreading from NE to SW, of the (estuarine ? to) fluvial deposits of the Grès d’Alet Formation at around 83 Ma. In the eastern part of the Mouthoumet Massif, sedimentary development is punctuated by tectonic events. Nevertheless, it is possible to identify in some outcrops the main elements of the two tectono-sedimentary cycles. – The cycle Ss1 is partly preserved in the genetic sequence which links the Calcaires de Camps-Peyrepertuse (shelf margin wedge systems tract) and the Marnes du Pla de Sagnes (transgressive systems tract). The cycle Ss2 is only known through different facies of the Grès de Labastide Formation: reworked deposits on the slope; coarse-grained silicoclastic deposits on the transit zones. – In the cycle Ss1 differences appear between the western and the eastern parts of the Mouthoumet massif. When in the western area deltaic conditions prevailed, in the eastern area a shallow carbonate and buildup facies developed. Such differences disappear in the cycle Ss2 by the general establishment of fore slope deltaic deposits. The geodynamic reconstruction resulting from plate kinematics indicates a major change between the early Coniacian (89 Ma) and the Middle Campanian (79 Ma), when the sinistral/divergent motion of Iberia with respect to stable Europe turned to a dextral/convergent movement. The tectono-sedimentary events presented here took place during this period (85 Ma to 83 Ma). The tectono-sedimentary evolution of the subpyrenean trough and the shift of the European and Iberian plates are thought to be intimately linked. The new chronological and geodynamical data proposed herein show that the genesis and the evolution of the subpyrenean sedimentary processes related to the northern Aquitanian margin of the Subpyrenean trough allow to draw some basic conclusions: – the opening of the Subpyrenean trough occurred in two steps, the first around 85 Ma and the second around 84 Ma; – this caused a change in the sedimentary setting with platform environments replacing the earlier ramp geometry; – the Subpyrenean trough formed and evolved under transtensive tectonic conditions; – during the late Santonian two tectono-eustatic sequences marked the former stages of the eastward opening and infilling of this basin; – the diachronous infilling which began here around 83,5 Ma prograded to the western Plantaurel and Petites-Pyrénées area; – no significant northward shifting of the depositional-axis of the Senonian basins occurred; – only a gradual westward shift of the depositional centers, along the subpyrenean direction of the slope area (N110°E to N130°E) was noticed.

scholarly journals Source-to-sink of Late carboniferous Ordos Basin: Constraints on crustal accretion margins converting to orogenic belts bounding the North China Block

2020 ◽  
Vol 11 (6) ◽  
pp. 2031-2052 ◽  
Author(s):  
Anqing Chen ◽  
Hao Zou ◽  
James G. Ogg ◽  
Shuai Yang ◽  
Mingcai Hou ◽  
...  
Keyword(s):  
North China ◽  
Ordos Basin ◽  
Late Carboniferous ◽  
North China Block ◽  
Crustal Accretion ◽  
The North ◽  
Source To Sink ◽  
Orogenic Belts
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