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

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, three third-order sequences were identified in the Paleogene Meihe Formation of Meihe Basin. 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). Typically, coal seams developed in the lake swamp environments with good thicknesses and continuity are economically attractive for mining. In the study area, they are primarily found in the TST and HST of Sequence I. These nice thick coal seams usually develop 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.

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

International Journal of Coal Science & Technology ◽

10.1007/s40789-020-00381-6 ◽

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.

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

10.21203/rs.3.rs-22238/v3 ◽

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.

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A Comprehensive Study of Pressure Transient Analysis With Sorption Phenomena for Single-Phase Gas Flow in Coal Seams

10.2118/20568-ms ◽

1990 ◽

Cited By ~ 20

Author(s):

K. Anbarci ◽

T. Ertekin

Keyword(s):

Transient Analysis ◽

Gas Flow ◽

Single Phase ◽

Coal Seams ◽

Pressure Transient Analysis ◽

Pressure Transient ◽

Comprehensive Study

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Sequence Stratigraphy of Well DX, Gongola Sub-Basin, Upper Benue Trough, Nigeria

Journal of Applied Sciences and Environmental Management ◽

10.4314/jasem.v23i10.14 ◽

2019 ◽

Vol 23 (10) ◽

pp. 1855-1860

Author(s):

F.O. Amiewalan ◽

E.O. Bamigboye

Keyword(s):

Gamma Ray ◽

Third Order ◽

Depositional Sequence ◽

Benue Trough ◽

Sequence Stratigraphic ◽

Surface System ◽

Sequence Boundaries ◽

System Tracts ◽

Maximum Flooding Surface ◽

Gamma Ray Log

: Biostratigraphic study of Well DX has yielded Cretaceous miospores and dinoflagellates cysts which heightened the recognition of sequence boundaries (SB), Maximum Flooding Surfaces (MFS) and associated Systems Tracts. Five maximum flooding surfaces between 95.6 Ma and 89.0 Ma, four sequence boundaries between 96.4 Ma and 93.0 Ma and threedepositional sequences were identified with varying average thicknesses of sediments interpreted from the gamma ray log and biostratigraphic data. The threedepositional sequences interpreted are -depositional sequence I (96.4 Ma - 95.4 Ma) (8240 ft. - 8120 ft.), depositional sequence II (95.4 Ma - 94.0 Ma) (8120 ft. - 7850 ft.) and depositionalsequence III (94.0 Ma - 93.0 Ma) (7850 ft. - 7550 ft.). All the depositional sequences fall within the third order cycle. The age of the well was attempted based on the presence of some selected marker fossils - Ephedripites spp., Classopollis spp., Spiniferites spp., Cyclonephelium distinctum, Cyclonephelium vannophorum, Subtilisphaera spp., Eucomiidites spp., Triorites africaensis, Odontochitina costata and Droseridites senonicus recovered from the studied intervals and was dated Albian - Santonian. The Sequence stratigraphic interpretations are useful in further deepening the knowledge of thesubsurface geology of the studiedwell in Gongola Sub Basin, Upper Benue Trough of Nigeria.Keywords: Sequence Boundary, Maximum Flooding Surface, System tracts, Depositional sequence

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Depositional environment of oil shale within the Eocene Jijuntun Formation in the Fushun Basin (NE China)

Marine and Petroleum Geology ◽

10.1016/j.marpetgeo.2014.04.011 ◽

2014 ◽

Vol 56 ◽

pp. 166-183 ◽

Cited By ~ 30

Author(s):

Susanne A.I. Strobl ◽

Reinhard F. Sachsenhofer ◽

Achim Bechtel ◽

Reinhard Gratzer ◽

Doris Gross ◽

...

Keyword(s):

Oil Shale ◽

Depositional Environment ◽

Ne China

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Subsurface geological imaging of northeastern Tunisia during the middle to the upper Eocene: Insights from integrated geophysical interpretation

Interpretation ◽

10.1190/int-2021-0020.1 ◽

2021 ◽

pp. 1-64

Author(s):

Oussama Abidi ◽

Kawthar Sebei ◽

Adnen Amiri ◽

Haifa Boussiga ◽

Imen Hamdi Nasr ◽

...

Keyword(s):

Sea Level ◽

Regional Scale ◽

Upper Eocene ◽

Sea Level Changes ◽

Seismic Profiles ◽

Borehole Data ◽

Third Order ◽

Good Correspondence ◽

Basin Inversion ◽

Sea Level Fluctuations

The Middle to Upper Eocene series are characterized by multiple hiatuses related to erosion, non-deposition or condensed series in the Cap Bon and Gulf of Hammamet provinces. We performed an integrated study taking advantage from surface and subsurface geology, faunal content, borehole logs, electrical well logs, vertical seismic profiles and surface seismic sections. Calibrated seismic profiles together with borehole data analysis reveal unconformities with deep erosion, pinchouts, normal faulting and basin inversion which are dated Campanian, intra-Lutetian and Priabonian compressive phases; these events were also described at the regional scale in Tunisia. Tectonics, sea level fluctuations and climate changes closely controlled the depositional process during the Middle to Upper Eocene time. The depositional environment ranges from internal to outer platform separated by an inherited paleo-high. We determine eight third order sequences characterizing the interaction between tectonic pulsations, sea level changes and the developed accommodation space within the Middle to Upper Eocene interval. We correlate the obtained results of the Cap Bon-Gulf of Hammamet provinces with the published global charts of sea-level changes and we find a good correspondence across third order cycles. Model-based 3D inversion proved to be a solution to model the lateral and vertical lithological distribution of the Middle to Upper Eocene series.

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Identification of sequence stratigraphy in the Dongying Formation of the Liaoxi low uplift, Bohai Bay Basin, China

Canadian Journal of Earth Sciences ◽

10.1139/cjes-2018-0276 ◽

2020 ◽

Vol 57 (5) ◽

pp. 647-661

Author(s):

Guangzhao Zhou ◽

Zhiming Hu ◽

Xianggang Duan ◽

Jin Chang

Keyword(s):

Trace Elements ◽

Sequence Stratigraphy ◽

Lake Level ◽

Three Dimensional ◽

Major And Trace Elements ◽

Bohai Bay ◽

Stratigraphic Sequence ◽

Accommodation Space ◽

System Tracts ◽

Mixed Layers

A change in sea level (or lake level) causes a change in accommodation space and sediment compensation, which then controls the formation and evolution of sequences. A multidisciplinary approach based on the integration of clay minerals, major and trace elements, paleosalinity, and three-dimensional seismic data were applied to interpret the stratigraphic sequence of the Dongying Formation in the Liaoxi low uplift. The sequence surface indicates that multistage tectonic action, paleoclimate, paleosalinity, and lake level change jointly controlled the sequence stratigraphy. The illite and illite–smectite mixed layers indicate an arid to semi-arid climate, whereas kaolinite implies humid conditions. Based on this principle, it is clear that the stratigraphic sequence is closely related to paleoclimate. Interpretation of the continental or marine character of the sediments via paleosalinity is increasingly based on the concentration of some trace elements. Hence, the sequence surface can be better evaluated through paleosalinity data. Based on the Sr/Ba and boron content, paleosalinity was evaluated and the sequence boundary was identified. Analysis of the concentration of major and trace elements was used to identify the lithology of the sedimentary region and further discern the stratigraphic sequence. These sequences are composed of lowstand, transgressive, and highstand system tracts. The work herein aimed to understand the reasons for the changes in sequences under the paleoclimate. In addition, major and trace elements, studied together with paleosalinity and clay mineral content, result in the determination of implications for sequence stratigraphy in many other basins. This paper can provide a novel method for comprehensively discerning a sequence surface.

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High Resolution Sequence Stratigraphy of Silurian Strata in Tazhong Area

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.734-737.111 ◽

2013 ◽

Vol 734-737 ◽

pp. 111-116

Author(s):

Lei Zhang ◽

Lun Wei Zhu ◽

Xue Juan Zhang

Keyword(s):

High Resolution ◽

Sequence Stratigraphy ◽

Third Order ◽

Sequence Stratigraphic ◽

Stratigraphic Framework ◽

Tazhong Area ◽

Sequence Boundaries ◽

High Resolution Sequence Stratigraphy ◽

Comprehensive Study

According to the fundamental principles of high resolution sequence stratigraphy, this paper focused on the application of high resolution sequence stratigraphy to Silurian strata in Tazhong area. Based on the comprehensive study of logging, drilling and seismic information, the high resolution sequence boundaries of Silurian strata and two scales of datum level cycles (long-term and intermediate-term) can be recognized in Tazhong area. Seven chronstratigraphic boundaries can be recognized in Silurian strata, including four sequence boundaries, which were the transformation from datum level falling to datum level rising, and three flooding surfaces, which the transformation from datum level rising to datum level falling. The Silurian strata in Tazhong area can be divided into three third-order sequences which correspond to three long-term datum level cycles, and 11 fourth-order sequences (parasequence sets) relating to 11 intermediate-term datum level cycles. The classification aforementioned can much better solved the corresponding problem between the six lithological sections of Silurian strata and sequence formations, finally establishes the high resolution sequence stratigraphic framework of Silurian strata in Tazhong area.

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Tectonic Evolution and Sequence Filling of Paleocene in Lishui Sag, East China Sea Shelf Basin

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.807-809.2244 ◽

2013 ◽

Vol 807-809 ◽

pp. 2244-2248 ◽

Cited By ~ 3

Author(s):

Jin Shui Liu ◽

Ming Zhang ◽

Jin Liang Zhang ◽

Chun Yan Wang ◽

Peng Hui Zhang

Keyword(s):

East China Sea ◽

Tectonic Evolution ◽

Sedimentary Facies ◽

East China ◽

The East China Sea ◽

Control Effect ◽

Third Order ◽

China Sea ◽

East China Sea Shelf ◽

System Tracts

The Lishui sag located at Southwest of the East China Sea Shelf Basin. It had undergone the four stages of syn-rift processes in Late Cretaceous to Paleocene: initial rift stage, main rift stage, stable rift stage and decline stage. The tectonic evolution has control effect on the development of sequence stratigraphy and the sediments distribution. Three second-order sequences, five third-order sequences and twelve system tracts are distinguished. Different sedimentary facies recognized in the Lishui sag.

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