Characteristics and origin of a new type of polyhalite potassium ore in the Lower Triassic Jialingjiang Formation, Puguang area, northeastern Sichuan Basin, SW China

AbstractA new type of polyhalite potassium ore (NTPPO) was found in the Lower Triassic Jialingjiang Formation, NE Sichuan Basin, SW China. It is water soluble, therefore can be exploited using the water-solution method, and is of great potential of economic value and research significance. Based on cores, thin sections, energy spectrum and SEM analyses, its microfeatures, macrofeatures and origin are discussed, and a genetic model is established to provide a scientific basis for future evaluation, prediction and exploration of potassium ore in the Sichuan Basin. It is proposed that the NTPPO was caused by storm activities: (1) the storm broke the original sedimentary polyhalite–gypsum beds, whose fragments were transported into the salt basin with high content of K+ and Mg2+; (2) in the basin, the polyhalite continued to be formed from gypsum by metasomatism with K- and Mg-rich brine; (3) during diagenesis, under high temperature and high pressure, K–Mg-rich brine from halite continued to replace anhydrite (or gypsum) to form polyhalite.

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Lithofacies, architecture, and reservoir heterogeneity of tidal-dominated platform marginal oolitic shoal: An analogue of oolitic reservoirs of Lower Triassic Feixianguan Formation, Sichuan Basin, SW China

Marine and Petroleum Geology ◽

10.1016/j.marpetgeo.2016.05.030 ◽

2016 ◽

Vol 76 ◽

pp. 290-309 ◽

Cited By ~ 12

Author(s):

Zhanfeng Qiao ◽

Xavier Janson ◽

Anjiang Shen ◽

Jianfeng Zheng ◽

Hongliu Zeng ◽

...

Keyword(s):

Sichuan Basin ◽

Lower Triassic ◽

Sw China ◽

Reservoir Heterogeneity ◽

Feixianguan Formation ◽

Oolitic Shoal ◽

Lower Triassic Feixianguan Formation

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Depositional model and controlling factors of oolithic shoal: A case study of the Lower Triassic Feixianguan Formation in the northwestern Sichuan Basin, China

Interpretation ◽

10.1190/int-2017-0185.1 ◽

2019 ◽

Vol 7 (1) ◽

pp. T127-T139

Author(s):

Yuan Huang ◽

Zhenyu Fan ◽

Bing He ◽

Song Tang ◽

Weifeng Du

Keyword(s):

Sea Level ◽

Sichuan Basin ◽

Lower Triassic ◽

Thin Sections ◽

Accommodation Space ◽

Feixianguan Formation ◽

Major Factors ◽

Lower Triassic Feixianguan Formation

Lower Triassic Feixianguan oolithic shoal complexes are widely developed in the northwestern Sichuan Basin, southwest China, where they host large natural gas reserves. To understand their development and the factors that controlled their deposition, we have used observations and interpretations of outcrops, cores, thin sections, well-log data, and seismic data to characterize the geologic and geophysical properties of the oolithic shoals of the Lower Triassic Feixianguan Formation in the Jiange area, northwestern Sichuan Basin. The oolithic shoals of the Feixianguan Formation are composed of locally dolomitized oolithic grainstones or packstones deposited in a semirestricted platform environment. With a thickness of more than 50 m, oolithic shoals mainly occur in the Fei 2 Member within the southeastern Jiange area. The results indicate that the shoals mainly lie above tectonic uplifts (caused by the northwest-trending basement-involved faults) and surrounding microtopographic highs. Furthermore, the prograding clinoforms and changes in accommodation space caused by sea-level fall influence the thickness of oolithic shoal deposits, and constrain their development in highstand systems tracts, resulting in their migration coinciding with the trend of clinoform progradation. We concluded that the development of oolithic shoals in the Jiange area may be controlled by two major factors: (1) the influence of paleotopography governed by the syndepositional faults on the accumulation of oolithic shoals and (2) the role of sea-level change in the migration of oolithic shoals.

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The Origin of Natural Gas and Influence on Hydrogen Isotope of Methane by TSR in the Upper Permian Changxing and the Lower Triassic Feixianguan Formations in Northern Sichuan Basin, SW China

Energy Exploration & Exploitation ◽

10.1260/0144-5987.32.1.139 ◽

2014 ◽

Vol 32 (1) ◽

pp. 139-158 ◽

Cited By ~ 9

Author(s):

Guoyi Hu ◽

Cong Yu ◽

Deyu Gong ◽

Xingwang Tian ◽

Wei Wu

Keyword(s):

Natural Gas ◽

Hydrogen Isotope ◽

Sichuan Basin ◽

Lower Triassic ◽

Upper Permian ◽

Sw China ◽

Origin Of Natural Gas

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Diagenetic evolution and its impact on reservoir porosity in Lower Triassic Jialingjiang Formation in eastern Sichuan Basin, SW China: Evidence from petrography, trace elements, and Isotopic Studies

Journal of Petroleum Science and Engineering ◽

10.1016/j.petrol.2021.109341 ◽

2021 ◽

pp. 109341

Author(s):

Xu Wenli ◽

Wen Huaguo ◽

Lu Ziye ◽

Zhong Kexiu ◽

Feng Qingping ◽

...

Keyword(s):

Trace Elements ◽

Sichuan Basin ◽

Lower Triassic ◽

Sw China ◽

Eastern Sichuan Basin ◽

Isotopic Studies ◽

Eastern Sichuan ◽

Reservoir Porosity ◽

Diagenetic Evolution

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Ferritin Labeled Antibody Staining of Thin Sections

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100064013 ◽

1969 ◽

Vol 27 ◽

pp. 420-421

Author(s):

J. D. McLean ◽

S. J. Singer

Keyword(s):

Biological Material ◽

Water Soluble ◽

Thin Sections ◽

Antibody Staining ◽

Thin Sectioning ◽

Ultrathin Sections

The successful application of ferritin labeled antibodies (F-A) to ultrathin sections of biological material has been hampered by two main difficulties. Firstly the normally used procedures for the preparation of material for thin sectioning often result in a loss of antigenicity. Secondly the polymers employed for embedding may non-specifically absorb the F-A. Our earlier use of cross-linked polyampholytes as embedding media partially overcame these problems. However the water-soluble monomers used for this method still extract many lipids from the material.

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Silica Monolith for the Removal of Pollutants from Gas and Aqueous Phases

Molecules ◽

10.3390/molecules26051316 ◽

2021 ◽

Vol 26 (5) ◽

pp. 1316

Author(s):

Vanessa Miglio ◽

Chiara Zaccone ◽

Chiara Vittoni ◽

Ilaria Braschi ◽

Enrico Buscaroli ◽

...

Keyword(s):

Rhodamine B ◽

Water Solution ◽

Synthesis Method ◽

Textural Properties ◽

Adsorption Properties ◽

Water Soluble ◽

Silica Monoliths ◽

Physico Chemical ◽

Gaseous Toluene ◽

Mcm 41

This study focused on the application of mesoporous silica monoliths for the removal of organic pollutants. The physico-chemical textural and surface properties of the monoliths were investigated. The homogeneity of the textural properties along the entire length of the monoliths was assessed, as well as the reproducibility of the synthesis method. The adsorption properties of the monoliths for gaseous toluene, as a model of Volatile Organic Compounds (VOCs), were evaluated and compared to those of a reference meso-structured silica powder (MCM-41) of commercial origin. Silica monoliths adsorbed comparable amounts of toluene with respect to MCM-41, with better performances at low pressure. Finally, considering their potential application in water phase, the adsorption properties of monoliths toward Rhodamine B, selected as a model molecule of water soluble pollutants, were studied together with their stability in water. After 24 h of contact, the silica monoliths were able to adsorb up to the 70% of 1.5 × 10−2 mM Rhodamine B in water solution.

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Characteristics of Mineralogy, Lithofacies of Fine-Grained Sediments and Their Relationship with Sedimentary Environment: Example from the Upper Permian Longtan Formation in the Sichuan Basin

Energies ◽

10.3390/en14123662 ◽

2021 ◽

Vol 14 (12) ◽

pp. 3662

Author(s):

Hongzhi Yang ◽

Liangbiao Lin ◽

Liqing Chen ◽

Yu Yu ◽

Du Li ◽

...

Keyword(s):

Mineral Composition ◽

Sichuan Basin ◽

Sedimentary Environment ◽

Organic Matter Content ◽

Upper Permian ◽

Carbonaceous Shale ◽

Carbonate Minerals ◽

Thin Sections ◽

Terrestrial Input ◽

The Sichuan Basin

The Longtan Formation of the Upper Permian in the Sichuan Basin has become a significant target for shale gas exploration in recent years. Multiple methods, including outcrop observations, thin sections, total organic matter content, X-ray diffraction and scanning electron microscopy were used to investigate the mineralogy, shale lithofacies assemblages and their relationships with the deposition environment. The mineral composition of the Longtan Formation has strong mineral heterogeneity. The TOC values of the Longtan Formation have a wide distribution range from 0.07% to 74.67% with an average value of 5.73%. Four types of shale lithofacies assemblages of the Longtan Formation could be distinguished, as clayey mudstone (CLS), carbonaceous shale (CAS), siliceous shale (SS) and mixed shale (MS) on the basis of mineral compositions. The TOC values of various types of shale lithofacies assemblages in the Longtan Formation varied widely. The shore swamp of the Longtan Formation is most influenced by the terrestrial input and mainly develops CLS and MS. The tidal flat is influenced by the terrestrial input and can also deposit carbonate minerals, developing CLS, CAS and MS. The shallow water melanged accumulation shelf develops CAS and MS, dominated by clay and carbonate minerals. The deep water miscible shelf develops CLS and SS, whose mineral composition is similar to that of the shore swamp, but the quartz minerals are mainly formed by chemical and biological reactions, which are related to the Permian global chert event. The depositional environment of the Longtan Formation controls the shale mineral assemblage of the Longtan Formation and also influences the TOC content.

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