Chemical and isotopic features of seepage gas from mud volcanoes in southern margin of the Junggar Basin, NW China

Xu, Wang; Zheng, Guodong; Ma, Xiaojun; Fortin, Danielle; Fu, Ching‐Chou; Li, Qi; Челноков, Г. А.; Ershov, V. V.

doi:10.1016/j.apgeochem.2021.105145

Cited by 3 publications

(1 citation statement)

References 33 publications

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“…As mentioned before, methane is the main associated gas of all studied samples. It is well known that biochemical fractionation related to the anaerobic degradation and methanogenesis is common for mud volcanoes worldwide [23,24]. Therefore we suggest that Ce depletion depends on microbial activity that catalyses the oxidation of Ce(III) [25].…”

Section: Water Chemistry and Rare Earth Elements In Mud Volcanic Watermentioning

confidence: 72%

Rare Earth Elements in Mud Volcanic Water of the North-Western Caucasus

Chelnokov,

Lavrushin,

Kharitonova

et al. 2023

J. Phys.: Conf. Ser.

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The distribution and abundance of rare earth elements in mud volcanic waters of the North-Western Caucasus were studied. Waters are represented by two types: Na-Cl and Na-HCO3-Cl. All waters are characterized by high TDS (8.1-29.5 g/l), neutral to alkaline pH (7.2–8.9), reduced conditions (Eh from -280 to +92 mV), and methane as the main associated gas. It is established that concentrations of REE vary from 0.18 to 7.02 ppb. Based on REE content and pH mud volcanic waters were subdivided into three groups. In each group the concentration of ∑REE roughly increases as pH decreases. Due to geological conditions the highest concentrations of REE are observed in mud volcanoes located within the oldest Cretaceous sediments within the flexural-fault zones of the North-Western Caucasus and the Taman region. Mud volcanoes connected with the Maikop series (₽3-N1), have lower REE concentrations. For the first time the geochemical and geological data suggest different sources of matter for mud volcanoes of the studied area.

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Section: Water Chemistry and Rare Earth Elements In Mud Volcanic Watermentioning

confidence: 72%

Rare Earth Elements in Mud Volcanic Water of the North-Western Caucasus

Chelnokov,

Lavrushin,

Kharitonova

et al. 2023

J. Phys.: Conf. Ser.

Self Cite

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Geochemical evaluation of mud volcanic sediment and water in Northern Borneo: A baseline study

Yussibnosh

Prasanna

Valappil

2023

Total Environment Research Themes

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The Geochemical Characteristics of Source Rock and Oil in the Fukang Sag, Junggar Basin, NW China

Tang

Chen

et al. 2023

Minerals

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The Fukang Sag in the Junggar Basin is the main exploration block. However, the origin and source of crude oil are still controversial, which seriously affects the well locating and exploration in this area. In the present work, 30 source rocks and 21 crude oils were collected for geochemical analysis to clarify the source of the organic matter, the sedimentary environment, and the evolution degree. Among them, the source rocks of the Pingdiquan Formation are type II1 organic matter with good quality, the source rocks of the Badaowan Formation are type II2-III organic matter with fair–good quality, and the source rocks of the Xishanyao Formation are type II2 organic matter with fair quality. All source rocks are in the mature stage. The results of the biomarker compounds show that the lacustrine mudstone of the Xishanyao Formation and the coal-measure mudstone of the Badaowan Formation were deposited in reducing environments. The former was mainly from lower aquatic organisms, and the latter was from terrestrial higher plants. The mudstone of the Pingdiquan Formation was formed in a weakly oxidizing–weakly reducing depositional environment, and its parent material was of mixed origin. Based on the results of the biomarker compounds and carbon isotopes, the crude oils were divided into three categories. The Family I crude oil has the characteristics of low maturity, low salinity, and more input of low-level aquatic organisms, and the carbon isotope has a good affinity with the lacustrine mudstone of the Xishanyao Formation. The Family II crude oil shows medium maturity, low salinity, mainly higher plant input, and heavy carbon isotope, mainly derived from the Badaowan Formation coal-measure mudstone. The Family III crude oil is characterized by high maturity, high salinity, mixed parent materials, and light carbon isotope and originates from the mudstone of the Pingdiquan Formation. The results provide a reference for oil and gas exploration and development in the eastern area of the Junggar Basin; the future research will focus on well areas with high maturity near the Fukang fault zone.

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Chemical and isotopic features of seepage gas from mud volcanoes in southern margin of the Junggar Basin, NW China

Cited by 3 publications

References 33 publications

Rare Earth Elements in Mud Volcanic Water of the North-Western Caucasus

Rare Earth Elements in Mud Volcanic Water of the North-Western Caucasus

Geochemical evaluation of mud volcanic sediment and water in Northern Borneo: A baseline study

The Geochemical Characteristics of Source Rock and Oil in the Fukang Sag, Junggar Basin, NW China

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