Alteration and burial dolomitization of fine-grained, intermediate volcaniclastic rocks under saline-alkaline conditions: Bayindulan Sag in the Er'Lian Basin, China

Zhu, Shifa; Jia, Yangwen; Cui, Hang; Dowey, Patrick J.; Taylor, Kevin G.; Zhu, Xiaomin; Liang, Ting

doi:10.1016/j.marpetgeo.2019.07.045

Cited by 7 publications

(9 citation statements)

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“…Murray et al (2018) believed that the pore fluids are generally supersaturated with respect to calcite in tephra‐rich sediments in shallow burial environments. The source of ‘C' for carbonate cements probably resulted from the formation water and meteoric water (Zhu et al, 2019). They mostly have direct contact with detrital framework grains and developed prior to the precipitation of quartz overgrowth.…”

Section: Discussionmentioning

confidence: 99%

“…In particular, microcrystalline and highly reactive volcanic ash with a large surface area can exert a stronger influence on diagenetic processes than volcanic debris (Hesse & Schacht, 2011; Murray et al, 2018). Alteration of volcanogenic materials contributes to precipitation of different authigenic minerals and (re)crystallisation of various mineral phases (e.g., clay minerals, zeolites, calcite and dolomite) (Antibus et al, 2014; Capo et al, 2000; Dill, 2016; Fisher & Schmincke, 1984; Huff, 2016; Spears, 2012; Zhu et al, 2019). Therefore, the prediction and evaluation of volcanogenic material alteration play an important role in the reservoir diagenesis of deeply buried prospects.…”

Section: Introductionmentioning

confidence: 99%

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Depositional and diagenetic processes in volcanic matrix‐rich sandstones from the Shanxi and Shihezi formations, Ordos Basin, China: Implication for volcano‐sedimentary systems

et al. 2022

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Volcanic eruptions can provide large amounts of sedimentary materials and expose fluvial valleys or lakes to catastrophic hyperpycnal flood events, but this process has not been documented in detail. The Ordos Basin Permian fluvio‐deltaic system reveals evidence for abundant volcanism linked to the tectonic evolution of orogenic belt around the basin and provides a ‘natural laboratory’ for investigating hyperpycnal flows associated with volcanic activity. This study analysed volcanic matrix‐rich sandstone (VMS) samples for petrology, mineralogy and geochemistry in order to address current and uncertain volcanogenic material provenance explanations and the lack of systematic investigations into the depositional and diagenetic processes of volcanic related sediments in the southwestern basin. By combining tectonic background surveys, detrital zircon geochronology and spatial distribution of volcanogenic materials, it was found that volcanogenic materials were not derived from the Yinshan‐Yanshan Orogenic Belt (YYOB) as previously thought, but instead evidence a southwestern origin from the North Qinling Orogenic Belt (NQOB). Volcanogenic materials retained in the provenance area during frequent volcanic eruptions were transported to the basin via fluvial systems shortly after the eruption. The associated sediments meet the criterion for hyperpycnites based on lithofacies associations, suggesting the occurrence of hyperpycnal flows during the deposition of VMS. During the subsequent burial stage, the VMS became three distinct types defined by their volcanic matrix content and have similar paragenetic sequences but different diagenetic intensities. The differing content of authigenic minerals in the three types was closely related to the sandstone pore structure characteristics and the evolution of volcanic‐matrix alteration materials. This article proposes a possible explanation for the previously unidentified tectonothermal events in the NQOB during the Permian, validating and reinforcing the theoretical work of hyperpycnal flow. This contribution provides new insights and understanding of the depositional and diagenetic processes of lacustrine basins with similar tectonic settings.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Depositional and diagenetic processes in volcanic matrix‐rich sandstones from the Shanxi and Shihezi formations, Ordos Basin, China: Implication for volcano‐sedimentary systems

et al. 2022

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“…Tuff-rich alkaline brackish lakes are referred to as the lakes whose deposits contain abundant volcanic rocks and tuff materials, yet their water salinity was low for primary evaporite deposition, or even low for primary calcium carbonate deposition, because marginal grainstones and microbialites are rare in these lake deposits. This type of dolomite- rich lakes include the examples of the Jimsar Sag of the Junggar Basin (during deposition of Lucaogou Formation) (Wu et al, 2016;Pan et al, 2022), Santanghu Basin (during deposition of Lucaogou Formation) (Liu et al, 2012) and Erlian Basin (during deposition of Alashan-Tenggeer formations) (Zhu et al, 2017b(Zhu et al, , 2019Su et al, 2020;Yang et al, 2020Yang et al, , 2021b. Common features in dolomite-rich volcanic-related brackish lakes include: i) dolomite is the main carbonate mineral in all lithofacies, while calcite mineral is much less or commonly absent; ii) dolomite crystals (>10 μm) are much larger than those found in dolomitic mudrocks and argillaceous dolomites (<5 μm) in saline lakes; iii) dolomite minerals show a variety of occurrences: disseminated crystals in matrix and aggregates with various shapes.…”

Section: Alkaline Brackish Lakesmentioning

confidence: 99%

Lacustrine dolomite in deep time: What really matters in early dolomite formation and accumulation?

Guo,

Wen,

et al. 2023

Earth-Science Reviews

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“…Cao et al, 2016;Jiang et al, 2015;Wu et al, 2016;Zhu et al, 2017a), is one of the most important shale oil formations (Wang et al, 2020b). Similar mixed depositional sequences are also important reservoirs in other petroliferous basins, such as the A'ershan Formation and Tenggeer Formation in the Er'Lian Basin (Zhu et al, 2017b(Zhu et al, , 2019, showing great research significance. In addition, previous studies have shown that the shale oil within Lucaogou Formation mainly occurs in the thin dolomite, siltstone or tuff rocks interbedded with shale rocks (Wu et al, 2016(Wu et al, , 2017.…”

Section: Introductionmentioning

confidence: 99%

Origin of authigenic albite in a lacustrine mixed-deposition sequence (Lucaogou Formation, Junggar Basin) and its diagenesis implications

Zhou

et al. 2021

Energy Exploration & Exploitation

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Authigenic albites occur widely in clastic reservoirs with important implications for diagenesis and reservoir formation. The middle Permian Lucaogou Formation in the Jimusaer Sag (Junggar Basin, NW China), where major exploration breakthroughs in shale oil have been achieved, reveals a new phenomenon that authigenic albites are abundant in unique mixed carbonate–volcanic–clastic sequences. This has not been reported in the literatures. To fill the knowledge gap, the origin of these authigenic albites and their relationship with dissolution pores (i.e. diagenesis implications) were investigated. Results show that two types (I and II) of authigenic albite were identified within the shale oil reservoirs. Euhedral Type I authigenic albites with 3–10 μm only occur in dolarenite intraclasts and are symbiotic with amorphous dolomite minerals with a pure chemical composition of >99% albite-end-member content. Larger Type II authigenic albites with 10–50 μm are widely distributed in reservoirs, primarily in dissolution pores, and coexist with authigenic dolomite minerals or dolomite overgrowths. Their chemical composition is less pure with anorthite-end-member contents that range from undetectable to 9.77%, with an average of 1.34%. A symbiotic relationship, pure chemical composition, size, and euhedral morphology indicate that Type I authigenic albites precipitated during syngenetic hydrothermal action. However, the morphology of dissolution pores, residual symbiotic “orthoclase”, impure chemical composition and carbon–oxygen isotope indicate that Type II were the products of the dissolution and reprecipitation of “perthite” crystal pyroclasts influenced by acid organic fluids in latter diagenesis. The differential dissolution of “orthoclase” and “albite” components in “perthite” crystal pyroclasts formed enormous intergranular secondary pores in the presence of dolomite minerals in the shale oil reservoirs.

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Alteration and burial dolomitization of fine-grained, intermediate volcaniclastic rocks under saline-alkaline conditions: Bayindulan Sag in the Er'Lian Basin, China

Cited by 7 publications

References 36 publications

Depositional and diagenetic processes in volcanic matrix‐rich sandstones from the Shanxi and Shihezi formations, Ordos Basin, China: Implication for volcano‐sedimentary systems

Depositional and diagenetic processes in volcanic matrix‐rich sandstones from the Shanxi and Shihezi formations, Ordos Basin, China: Implication for volcano‐sedimentary systems

Lacustrine dolomite in deep time: What really matters in early dolomite formation and accumulation?

Origin of authigenic albite in a lacustrine mixed-deposition sequence (Lucaogou Formation, Junggar Basin) and its diagenesis implications

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