Fluid sources and chemical processes inferred from geochemistry of pore fluids and sediments of mud volcanoes in the southern margin of the Junggar Basin, Xinjiang, northwestern China

Li, Niu; Hua-gu, Huang; Chen, Duofu

doi:10.1016/j.apgeochem.2014.04.007

Cited by 16 publications

(8 citation statements)

References 46 publications

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“…A substantial body of literature exists on the impact of subsurface processes in the evolution of pore waters emanating from mud volcanoes. These studies show substantial alterations of pore waters chemistry which is attributed to clay dehydration during smectite to illite transition [e.g., Dia et al, 1999;Brown et al, 2001;D€ ahlmann and de Lange, 2003;Godon et al, 2004;Hensen et al, 2004;You et al, 2004;Mazzini et al, 2007Mazzini et al, , 2009Chao et al, 2013;Li et al, 2014]. Clay dehydration produces water with positive d 18 O, negative dD values, and rich in sodium.…”

Section: Venting Fluids Gas and Sedimentmentioning

confidence: 99%

“…There are large variations in the size and geometries as well as the sources of the fluids and sediments that are expelled by mud volcanoes. Biogenic or thermogenic hydrocarbon gases and pore waters of highly evolved compositions, indicating extensive water‐rock interactions [e.g., Li et al ., ], are frequently observed in such features. Mud volcanoes can have discrete eruptive events or periods of eruption that expel massive quantities of fine‐grained sediments in periods of hours to centuries [ Zoporowski and Miller , ].…”

Section: Introductionmentioning

confidence: 99%

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Active mud volcanoes on the continental slope of the Canadian Beaufort Sea

Paull

Dallimore

Caress

et al. 2015

Geochem Geophys Geosyst

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Morphologic features, 600-1100 m across and elevated up to 30 m above the surrounding seafloor, interpreted to be mud volcanoes were investigated on the continental slope in the Beaufort Sea in the Canadian Arctic. Sediment cores, detailed mapping with an autonomous underwater vehicle, and exploration with a remotely operated vehicle show that these are young and actively forming features experiencing ongoing eruptions. Biogenic methane and low-chloride, sodium-bicarbonate-rich waters are extruded with warm sediment that accumulates to form cones and low-relief circular plateaus. The chemical and isotopic compositions of the ascending water indicate that a mixture of meteoric water, seawater, and water from clay dehydration has played a significant role in the evolution of these fluids. The venting methane supports extensive siboglinid tubeworms communities and forms some gas hydrates within the near seafloor. We believe that these are the first documented living chemosynthetic biological communities in the continental slope of the western Arctic Ocean.

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Section: Venting Fluids Gas and Sedimentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Active mud volcanoes on the continental slope of the Canadian Beaufort Sea

Paull

Dallimore

Caress

et al. 2015

Geochem Geophys Geosyst

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“…6) (Perry and Hower, 1970;Hower et al, 1976;Martin et al, 1996;Hensen et al, 2007;Vanneste et al, 2011). Moreover, this process in turn can produce a reduction of Cl − due to the freshwater contribution (Vanneste et al, 2011;Li et al, 2014). In our case, this effect was not observed (Fig.…”

Section: Major Elementsmentioning

confidence: 49%

Biogeochemistry of surface sediments in mud volcanoes of the Gulf of Cádiz

et al. 2021

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The shallowest sediment of three mud volcanoes (MVs) located in the middle slope of the Gulf of Cádiz, Anastasya, Pipoca and St. Petersburg, have been seasonally studied during June and December 2016. These structures are locally important contributors of many biogeochemical active substances to the water column, with a special attention in the emission of methane (CH 4 ). Along this study, the role of organic matter diagenesis and its contribution to the diffusive fluxes estimated in the sediment-water interface from the three MVs have been investigated mainly. For this, the first combined analyses of sediment properties (granulometry, porosity, density, organic carbon) and pore water chemistry (major elements, dissolved inorganic carbon (DIC), nutrients, CH 4 and nitrous oxide) have been carried out. Anastasya and St. Petersburg MVs presented similar behaviours, with a slight concentration variation for the chemical variables in the top layers of the sedimentary record followed by a more intense vertical variation in deeper layers. Anastasya MV showed some typical processes of these structures, such as the clay dehydration, the dissolution of halite and the precipitation of authigenic carbonates, which was also observed in St. Petersburg MV. Organic matter diagenesis clearly altered the biogeochemical profiles, except for Pipoca MV. Moreover, mud breccia with a mousse-like texture has been identified in the deepest levels of Anastasya and St. Petersburg MVs. Here, anaerobic oxidation of methane is linked to the decrease of SO 2− 4 and the increases of CH 4 and DIC with the core depth. Changes across the sediment-water interface presented low diffusive fluxes in the three MVs due to the presence of other processes as the irrigation by benthic macrofauna, the action of bottom currents and/or the upward fluid migration. From the obtained results, we can conclude that Anastasya MV presents a certain venting activity at present.

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“…位于北天山山前坳陷带的独山子背斜为一封闭的储油气构造, 在背斜轴部分布着数条正断层和张性破裂带, 构成该油气构造的古近系为主要含油气层, 新近系含泥、砂质地层为封闭层, 油气构造中具有异常高的层间压力和背斜核部发育的张性破裂是独山子泥火山活动的主要地质条件 [19] (图 1). 独山子泥火山喷口沉积物和孔隙水的地球化学研究结果显示其仍在活动 [20] .…”

Section: 地质背景与泥火山特征unclassified

Estimation of greenhouse gas flux from mud volcanoes in the Dushanzi area, southern Junggar Basin of Northwest China

Zheng

Guo

et al. 2014

Chin. Sci. Bull.

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Mud volcanoes are a direct manifestation of deep tectonic and subsurface fluid invasion activities near the earth surface. Such activity emits large amounts of greenhouse gases, predominantly methane, and is also responsible for an important part of the total geologic carbon flux to the atmosphere. However, there is little research on estimation of greenhouse gas flux from mud volcanoes in China. The mud volcanoes in the Dushanzi area of the Xinjiang Uygur Autonomous Region are typical and very active, emitting various types of greenhouse gases. We used a sealed chamber connected to a methane detector to measure the in situ gas emission rate and estimate flux. Based on well-known research methods, experience with greenhouse gas emissions from mud volcanoes abroad, and gas composition data, we estimated total flux of those gases emitted from the Dushanzi mud volcanoes. Greenhouse gas fluxes from macro-seeps in areas DSZ-01 and DSZ-03 exceeded 161 kg/a. Flux by micro-seepage in areas DSZ-01 (314 m 2 ), DSZ-02 (8400 m 2 ), and DSZ-03 (314 m 2 ) was 16.6 t/a. mud volcano, greenhouse gas, carbon emission, Dushanzi, Junggar Basin

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Fluid sources and chemical processes inferred from geochemistry of pore fluids and sediments of mud volcanoes in the southern margin of the Junggar Basin, Xinjiang, northwestern China

Cited by 16 publications

References 46 publications

Active mud volcanoes on the continental slope of the Canadian Beaufort Sea

Active mud volcanoes on the continental slope of the Canadian Beaufort Sea

Biogeochemistry of surface sediments in mud volcanoes of the Gulf of Cádiz

Estimation of greenhouse gas flux from mud volcanoes in the Dushanzi area, southern Junggar Basin of Northwest China

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