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	1. Methane emissions from mud volcanoes in the Southern Junggar Basin, China
	Wan Zhifeng
	Earth Science 30 July 2014
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:Methane emissions from geological sources have recently been recognised as an important component of the atmospheric methane budget. Mud volcano eruptions are an important source of methane gas emissions. A mud volcano is a geological structure formed as a result of the emission of argillaceous material on the Earth's surface or sea floor. Mud volcanoes are widely distributed, and their methane emissions are enormous. Increasing methane emissions from mud volcanoes would mean a significant increase in natural carbon emissions worldwide, with a corresponding significant effect on the worldwide environment. The annual methane emission of a single mud volcano in the southern margin of Junggar Basin, northwestern China, equals up to 666.20 m3. Additionally, the estimated annual methane emissions might be up to 3.33 × 107 m3 in the study area, which measures 200 × 100 m2. Thus, more attention should be focused on the methane emitted from mud volcanoes.
	TO cite this article:Wan Zhifeng. Methane emissions from mud volcanoes in the Southern Junggar Basin, China[OL].[30 July 2014] http://en.paper.edu.cn/en_releasepaper/content/4605218


	2. Shrinkage and cracking behaviour of swelling soil under different temperatures
	TANG Chaosheng
	Earth Science 06 January 2011
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	Abstract:In this investigation, desiccation tests were conducted on two swelling soil slurries (Xiashu clay and Romainville clay) under different environmental temperature conditions. During drying, the water loss rate, volume shrinkage, initiation and propagation of desiccation cracks were monitored. By applying computer image processing technology, the geometric parameters of the crack pattern and the corresponding probability density functions (PDF) were determined. In addition, the surface crack ratio Rsc was introduced to quantify crack networks at different water contents. The results show that the soil water evaporation process is composed of two stages: a constant rate zone and a subsequent falling rate zone; higher water loss rate is accompanied by higher temperature; the cracking water content, crack length, width, aggregate area and their probability density functions increase with an increase of temperature; the Rsc increases evidently with a decrease of water content, and gradually tents to stabilization once the shrinkage limit (SL) is reached. The increase of Rsc is accompanied by the decrease of void ratio, and the cracking curve (Rsc versus water content) to some extent reflects the shrinkage properties of soil. During drying, most of the cracks developed before the air entry (AE) point where the soil specimen is still saturated.
	TO cite this article:TANG Chaosheng. Shrinkage and cracking behaviour of swelling soil under different temperatures[OL].[ 6 January 2011] http://en.paper.edu.cn/en_releasepaper/content/4404675


	3. The Neoproterozoic molar-tooth carbonatite types in Northern Anhui and Jiangsu Provinces and the forming mechanism
	Jia Zhihai,Zhang Liwei,Hong Tianqiu,Zheng Wenwu
	Earth Science 08 January 2010
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	Abstract:Molar-tooth carbonatites can be found in almost all the Neoproterozoic carbonatite strata in Northern Anhui and Jiangsu Provinces. According to their features in different strata, two molar-tooth carbonatite types can be differentiated in this area. Type 1 molar-tooth carbonatites coexisted with stromatolite bioherms, gravels, debris, slump structures, swash channels and hummocky crossbeddings, were formed in the upper Liulaobei Formation and Jiuliqiao Formaiton which belong to the lower Neoproterozoic in this area. Type 2 molar-tooth carbonatites consisted in widely spread rhythmic units with graded beds and typical erosion surfaces, were formed in other Formations which belong to the upper Neoproterozoic in this area. The initial forming power of the molar-tooth carbonatites in this area might be the crustal movements which were caused by the break-up of the Rodinia. Type 1 molar-tooth carbonatites formed in tempestuously changing environments might be a signal of the break-up prelude of the Rodinia, while Type 2 molar-tooth carbonatites formed in steadily, periodically changing environments might indicate the intermittent release of the earth stress during the break-up period of the Rodinia.
	TO cite this article:Jia Zhihai,Zhang Liwei,Hong Tianqiu, et al. The Neoproterozoic molar-tooth carbonatite types in Northern Anhui and Jiangsu Provinces and the forming mechanism[OL].[ 8 January 2010] http://en.paper.edu.cn/en_releasepaper/content/38685

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