Framework of Sequence Stratigraphy Sedimentary System and Evolution of Yimin Formation in Yimin Depression

2013 ◽  
Vol 734-737 ◽  
pp. 71-80 ◽  
Author(s):  
Bi Ao Guo ◽  
Long Yi Shao ◽  
Sheng Zhang ◽  
Kang Yang Qing ◽  
Ming Ming Wang
Keyword(s):  
Flood Plain ◽  
Structure Evolution ◽  
Cumulative Probability ◽  
Delta Front ◽  
Sequence Stratigraphic ◽  
Delta Plain ◽  
Stratigraphic Framework ◽  
Sedimentary System ◽  
Well Data ◽  
Object Of Study

Well data, cores, logging, connecting with the characteristic of structure evolution are used to establish the sequence stratigraphic framework of the coal-bearing formation of Yimin Depression in Early Cretaceous. The coal-bearing formation can be divided into two three-order sequences and Yimin Formation, as one of the three-order sequences,is the most important object of study. Through cores description, research of Spontaneous Potential and Resistivity curve shape and analysis of sedimentary Cumulative Probability Size Curve, four facies including fan delta, braid river delta, sublacustrine fan and lake,and some subfacies are identified in Yimin Formation in the sequence stratigraphic framework. Coal-rich belts develop in the southwest delta plain and northwest interdeltaic bay in Yimin Depression. According to the characteristic of the development of coal and sedimentary system, two kinds of coal accumulation models, shallow lake and flood plain in delta front and interdelta, are concluded in Yimin Depression.

scholarly journals Facies analysis of Sunakothi Formation, Kathmandu basin, Nepal and its significance

2014 ◽  
Vol 47 (1) ◽  
pp. 57-64
Author(s):  
Mukunda Raj Paudel
Keyword(s):  
Lake Level ◽  
Facies Analysis ◽  
Flood Plain ◽  
Delta Front ◽  
Gravel Beds ◽  
Delta Plain ◽  
Facies Associations ◽  
Ripple Sand ◽  
Lacustrine Delta ◽  
Lacustrine Facies

This study decipher facies characteristic of Sunakothi Formation at southern part of Kathmandu Basin. Thick sandy and muddy sequence is found on an open lacustrine facies of the Kalimati Formation. Five facies associations have been recognized within the sandy and muddy facies. These are: (a) muddy rhythmites and silt and laminated to ripple sand bed of the prodeltaic origin (pd), (b) association of cross-stratification, rippledrift and parallel lamination in the lacustrine delta front origin (df), (c) muddy flood-plain and alteration of the fine and coarse sediments of delta-plain origin (dp), (d) sandy to silty rhythmites of the marginal shallow lacustrine origin above the delta-plain (ml), and (e) association of fluvial origin (fl ). Former three associations are interbeded by the thick gravel deposits, which is gravelly braided river origin. Transition from lacustrine to alluvial system is characterized by fluvial and deltaic system in the south. Sedimentology of the Sunakothi Formation indicates deposition during rapid lake level rise and also the thick channelized fluvial gravel beds within the sandy and muddy sequence indicate lake level fall. The cause could be climatic as well as activity of the basin margin tectonics. Sunakothi Formation is the southern counterpart of the Thimi-Gokarna Formations distributed in the northern part of the basin.

Study on Sedimentary Characteristics and Models of River Group Sequence

2014 ◽  
Vol 608-609 ◽  
pp. 1141-1146
Author(s):  
Zheng Shi ◽  
Long Wei Qiu ◽  
Yong Qiang Yang
Keyword(s):  
Clear Understanding ◽  
Delta Front ◽  
Sequence Stratigraphic ◽  
Sedimentary Characteristics ◽  
Stratigraphic Framework ◽  
Depositional System ◽  
Sand Body ◽  
System Tracts ◽  
Mud Logging ◽  
Core Description

Zhunzhong area Qingshui River group has top and bottom boundaries,which are not clear,and research on the evolution of the lack in sequence stratigraphic framework of deposition and on the reservoir sand body types do not have a clear understanding problem.In seismic interpretation, core description and based on the analysis of the related test,combining with the mud logging and well logging data,for the redefinition of Qingshui River group on the top and bottom boundaries,it identifies 6 time significance of sequence boundary,taking Qingshui River group can be divided into 2 sequences, 5 system tracts;clear and definite the study area mainly developed delta lacustrine depositional system,which can be further divided into the delta front subfacies, beach bar facies and semi deep lake subfacies. It takes an analysis on the sedimentary characteristics and distribution rules of different types, and it controls effect of topography and hydrodynamic conditions on deposition system, and then puts forward the corresponding sedimentary patterns.

Outcrop analysis and facies model of an Upper Permian tidally influenced fluvio-deltaic system: Northern Sydney Basin, SE Australia

2019 ◽  
Vol 156 (10) ◽  
pp. 1715-1741 ◽  
Author(s):  
Jake Breckenridge ◽  
Angelos G. Maravelis ◽  
Octavian Catuneanu ◽  
Kevin Ruming ◽  
Erin Holmes ◽  
...  
Keyword(s):  
Source Region ◽  
Depositional Environments ◽  
Sediment Supply ◽  
Upper Permian ◽  
Delta Front ◽  
Sediment Grain Size ◽  
Sequence Stratigraphic ◽  
Delta Plain ◽  
Facies Associations ◽  
The Impact

AbstractAn integrated study of sedimentological, sequence-stratigraphic and palaeodispersal analysis was applied to the Upper-Permian clastic sedimentary succession in the Northern Sydney Basin, Australia. The succession is subdivided into fifteen facies and three facies associations. The facies associations are further subdivided into eight sub-facies associations. The sedimentary evolution involves progradation from delta-front to delta-plain to fluvial depositional environments, with a significant increase in sediment grain size across the unconformable contact that separates the deltaic from the overlying fluvial system. In contrast to the delta front that is wave/storm- and/or river-influenced, the delta plain is significantly affected by tides, with the impact of tidal currents decreasing up-sequence in the delta plain. The general lack of wave-influenced sedimentary structures suggests low wave energy in the delta plain. The abrupt termination of the tidal impact in the fluvial realm relates to the steep topographic gradients and high sediment supply, which accompanied the uplift of the New England Orogen. The sequence-stratigraphic framework includes highstand (deltaic forest and topset) and lowstand (fluvial topset) systems tracts, separated by a subaerial unconformity. In contrast to most of the mud-rich modern counterparts, this is an example of a sand-rich tidally influenced deltaic system, developed adjacent to the source region. This investigation presents a depositional model for tidal successions in regions of tectonic uplift and confinement.

scholarly journals Coal-bearing strata sequence stratigraphy of Paleogene Meihe Formation, Meihe Basin, NE China

2020 ◽  
Author(s):  
Yueyue Bai ◽  
Qingtian Lü ◽  
Zhaojun Liu ◽  
Pingchang Sun ◽  
Rong Liu ◽  
...  
Keyword(s):  
Sedimentary Environment ◽  
Seismic Profiles ◽  
Coal Seams ◽  
Third Order ◽  
Sequence Stratigraphic ◽  
Delta Plain ◽  
Accommodation Space ◽  
Geochemical Properties ◽  
Stratigraphic Framework ◽  
System Tracts

AbstractThe Meihe Basin is an important Paleogene coal-bearing basin located in the Dunhua-Mishan Fault Zone, northeastern China. Based on a comprehensive study of well logs, seismic profiles, cores and rock geochemical properties, the coal distribution, paleoenvironment evolution within a sequence stratigraphic framework and the accumulation model to explain how coal seams developed in small fault basin were discussed in detail. Three-third-order sequences were identified in the Paleogene Meihe Formation of Meihe Basin and the two coal-bearing sequences are the Lower Coal-bearing Member of Sequence I and the Upper Coal-bearing Member of Sequence III. All three types of system tracts are developed in both sequences, i.e., the lowstand systems tract (LST), the transgressive systems tract (TST), and the highstand systems tract (HST). In LST of Sequence I, fan delta plain marsh is the main coal accumulating environment where coal seams are thin, discontinuous and therefore uneconomic for mining, and it is the same with all coal seams developed in Sequence III. While in TST and HST of Sequence I, lake swamp is the main sedimentary environment where coal seams are thick, continuous, widely distributed, and thus economically attractive for mining. In the study area, the nice thick economical coal seams are usually developed in an ideal stable depositional environment where organic matter accommodation space grows at a balanced rate with peat, in other words, free of sediment input or channel migration. The key findings of this study could provide guidance for the exploration of coal seams in the Meihe Basin and other similar basins.

scholarly journals Coal-bearing strata sequence stratigraphy of Paleogene Meihe Formation, Meihe Basin, NE China

2020 ◽  
Author(s):  
Yueyue Bai ◽  
Qingtian Lü ◽  
Zhaojun Liu ◽  
Pingchang Sun ◽  
Rong Liu ◽  
...  
Keyword(s):  
Sedimentary Environment ◽  
Seismic Profiles ◽  
Coal Seams ◽  
Third Order ◽  
Sequence Stratigraphic ◽  
Delta Plain ◽  
Accommodation Space ◽  
Geochemical Properties ◽  
Stratigraphic Framework ◽  
System Tracts

Abstract The Meihe Basin is an important Paleogene coal-bearing basin located in the Dunhua-Mishan Fault Zone, northeastern China. Based on a comprehensive study of well logs, seismic profiles, cores and rock geochemical properties, the coal distribution, paleoenvironment evolution within a sequence stratigraphic framework and the accumulation model to explain how coal seams developed in small fault basinsw were discussed in detail. Three third-order sequences were identified in the Paleogene Meihe Formation of Meihe Basin and the two coal-bearing sequences are the Lower Coal-bearing Member of Sequence I and the Upper Coal-bearing Member of Sequence III. All three types of system tracts are developed in both sequences, i.e., the lowstand systems tract (LST), the transgressive systems tract (TST), and the highstand systems tract (HST). In LST of Sequence I, fan delta plain marsh is the main coal accumulating environment where coal seams are thin, discontinuous and therefore uneconomic for mining, and it is the same with all coal seams developed in Sequence III. While in TST and HST of Sequence I, lake swamp is the main sedimentary environment where coal seams are thick, continuous, widely distributed, and thus economically attractive for mining. In the study area, the nice thick economical coal seams are usually developed in an ideal stable depositional environment where organic matter accommodation space grows at a balanced rate with peat, in other words, free of sediment input or channel migration. The key findings of this study could provide guidance for the exploration of coal seams in the Meihe Basin and other similar basins.

Sequence stratigraphic framework of the mid-Cretaceous nonmarine Potomac Formation, New Jersey and Delaware

2020 ◽  
Vol 90 (7) ◽  
pp. 713-728
Author(s):  
Jesse D. Thornburg ◽  
Kenneth G. Miller ◽  
James V. Browning
Keyword(s):  
New Jersey ◽  
Sequence Stratigraphic ◽  
Delta Plain ◽  
Pollen Zone ◽  
Stratigraphic Framework ◽  
Lower Aptian ◽  
Sequence Boundaries ◽  
Lithologic Unit ◽  
Stacking Patterns ◽  
Order Sequence

ABSTRACT We developed a sequence stratigraphic framework for the (Barremian to lower Cenomanian) fluvial–deltaic (primarily delta plain) Potomac Formation in the Medford, New Jersey, Fort Mott, New Jersey, and Summit Marina, Delaware coreholes. Previous studies have correlated distinctive lithologic units with attendant pollen zones and identified tentative sequence boundaries between lithologic units I (Barremian to lower Aptian, pollen Zone I), II (Aptian to lowermost Cenomanian, pollen Zone II), and III (lower Cenomanian, pollen Zone III) at all three sites. Here, we further subdivide these units into packages known as fluvial aggradation cycles (FACs). An analysis of FAC stacking patterns reveals potential sequence boundaries and systems tracts. FACs indicate that major lithologic unit boundaries are also sequence boundaries, indicate tentative higher-order sequence boundaries, and provide potential additional correlative surfaces among Potomac Formation sites. Our study demonstrates the applicability of the FAC method to identify stacking patterns and sequence stratigraphic surfaces in fluvial–deltaic deposits and demonstrates that FACs are excellent tools to decipher the difficult-to-correlate surfaces.

scholarly journals Sedimentology and Stratigraphy of an Upper Permian Sedimentary Succession: Northern Sydney Basin, Southeastern Australia

Geosciences ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 273
Author(s):  
Sean Melehan ◽  
Chrysanthos Botziolis ◽  
Angelos G. Maravelis ◽  
Octavian Catuneanu ◽  
Kevin Ruming ◽  
...  
Keyword(s):  
New England ◽  
Depositional Environments ◽  
Upper Permian ◽  
Delta Front ◽  
Sequence Stratigraphic ◽  
Delta Plain ◽  
Southeastern Australia ◽  
Normal Regression ◽  
Facies Associations ◽  
The Impact

This study integrates sedimentological and stratigraphic insights into the Upper Permian sedimentary rocks of the Wittingham, Tomago and Newcastle Coal Measures in the Northern Sydney Basin, Australia. Facies analysis documented fifteen facies that belong to seven facies associations. These facies associations correspond to different depositional environments and sub-environments including prodelta, delta-front, upper, lower delta-plain and fluvial. The stratigraphic development points to a shallowing upward trend and is reflected with fluvial deposits sitting on top of the deltaic deposits. The fluvio-deltaic contact is represented by an unconformity and displays an upward increase in sediment caliber. The delta front is mainly controlled by wave, storms- and/or river currents, even though the contribution of tides also occurs in the form of sedimentary structures that suggest tidal influence. In contrast, prodelta and delta-plain are significantly modulated by tidal currents. The impact of tides in the delta plain is fading away upward and therefore, the upper delta plain is much less impacted compared to the lower delta plain. The low abundance of wave ripples suggests that the wave action was not very important in the delta plain. Steep topographic gradients and increased sediment input are suggested, based on the limited or absent evidence of tides in the fluvial realm, related to the growing New England Orogen. In sequence stratigraphic terms, the deltaic system accumulated during highstand normal regression, while the deposition of the overlying fluvial system occurred during lowstand normal regression. The two systems are separated by a subaerial unconformity developed during an intervening forced regression. Short periods of transgression are inferred from the presence of higher frequency cycles in the delta-front.

scholarly journals Depositional model and sequential evolution of the upper Quintuco Formation in its type area: implications for paleogeographic reconstructions for the southern Neuquén Basin during the Valanginian

2016 ◽  
Vol 43 (2) ◽  
pp. 215 ◽  
Author(s):  
Mariana S. Olivo ◽  
Ernesto Schwarz ◽  
Gonzalo D. Veiga
Keyword(s):  
Source Area ◽  
Evolutionary Stage ◽  
Delta Front ◽  
Sequence Stratigraphic ◽  
Architectural Analysis ◽  
Delta Plain ◽  
Stratigraphic Analysis ◽  
Facies Associations ◽  
Neuquen Basin ◽  
Neuquén Basin

The Quintuco Formation (Berriasian-early Valanginian) in central Neuquén province comprise marine, transitional and continental deposits. These deposits were included in several regional stratigraphic studies since the 80’s but receiving little attention in terms of detailed facies analysis, palaeoenvironmental reconstructions and evolution. Understanding the evolutionary stage corresponding to cusp section of the Quintuco Formation and its relation with basal deposits of the Mulichinco Formation, is key to estimate the magnitude of associated change to the event of basin reconfiguration occurred in the early later Valanginian. In order to reconstruct the final stages of the evolution of the Quintuco Formation in its type locality (Sierra de la Vaca Muerta), a facial, architectural and sequence-stratigraphic analysis of the uppermost interval is presented. The study comprise the sedimentological description and interpretation of facies, combined with architectural analysis of key intervals. This allowed the identification of 7 facies associations, which represent the accumulation in prodelta (FA 1), delta front (FA 2 and FA 3), distal delta plain (FA 4 y FA 5) and proximal delta plain (FA 6 and FA 7). Subsequently, the spatial distribution of the different facies associations were analyzed and key surfaces related to significant changes in the depositional settings were identified across the investigated region. In this context, sequence-stratigraphic analysis of the studied interval was addressed and stacking patterns of the successions and vertical evolution of the interval are discussed. The upper interval of the Quintuco Formation represents the development of a deltaic system, where fluvial processes were dominant, but waves affected the off-axis parts of the system. The proximal areas were located towards the southwest with prodelta settings located toward the east. The delta system was built by successive shallowing-upward successions (15-40 m), bounded by regional transgressive surfaces, and with a long-term progradational staking. The reconstructed paleogeography for the last evolutionary stage of the Quintuco Formation suggest a well-established source area from the west-southwest, that would represent a new insight for paleogeographic settings for the southern Neuquén Basin during the Valanginian.

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