Gases in Southern Junggar Basin mud volcanoes: Chemical composition, stable carbon isotopes, and gas origin
Gases in Southern Junggar Basin mud volcanoes: Chemical composition, stable carbon isotopes, and gas origin
复制标题
DOI：
10.1016/j.jngse.2013.06.006
复制
发表时间：
2013-09
影响因子：
--
通讯作者：
Xia, Bin
中科院分区：
文献类型：
--
作者：
Wan, Zhifeng;Shi, Qiuhua;Guo, Feng;Zhong, Yun;Xia, Bin
泥火山是陆地和近海构造挤压区常见的地质现象。泥火山喷发对研究构造活动、沉积环境和油气聚集具有重要意义。泥火山释放的甲烷也是温室气体的来源。准噶尔盆地南缘发育有许多泥火山，但对其研究甚少。本文分析了这些泥火山的化学成分、稳定碳同位素和气体来源。准噶尔盆地南缘泥火山气体组分以甲烷为主，平均含量为92.81%。其它气体组分为乙烷（4.8-2.93%）、丙烷（0.01-0.05%）、CO2（0.11-5.36%）和N2（0-3.63%）。甲烷碳同位素（δ 13 C1）介于−38.92‰至−42.82‰之间，乙烷碳同位素（δ 13 C2）介于−20.50‰至−22.95‰之间。所有这些数据都与世界上其他泥火山的特征相似。根据C1（甲烷）/（C2（乙烷）+ C3（丙烷））和δ 13 C1、δ 13 C2结果，释放气体为煤型热成因气体。天然气来源于中下侏罗统煤系。
Mud volcanoes are a common geological phenomenon in tectonically compressed areas on land and offshore. Mud volcano eruptions hold great significance for research on tectonic activity, the sedimentary environment and oil and gas accumulation. Methane emitted from mud volcanoes is also a source of greenhouse gas. Many mud volcanoes have developed in the southern Junggar Basin, Northwest China, but they have been studied very little. In this study, the chemical composition, stable carbon isotopes and gas origin of these mud volcanoes are analysed. The major gas component from the mud volcanoes in the southern Junggar Basin is methane, with an average value of 92.81%. The other gas components are ethane (4.8–2.93%), propane (0.01–0.05%), CO2(0.11–5.36%) and N2(0–3.63%). The methane carbon isotope ratios (δ13C1) are between −38.92‰ and −42.82‰, and ethane carbon isotope ratios (δ13C2) are −20.50‰ to −22.95‰. All these data have similar characteristics to other mud volcanoes around the world. Based on the C1(methane)/(C2(ethane) + C3(propane)) and δ13C1, δ13C2results, the released gas is a coal-type thermogenic gas. The gas is from a middle-low Jurassic coal-measure source.
登录
查看更多内容
影响因子：
1.8
作者：
A. Ding;R. Huí;Z. N. Zhang
通讯作者：
A. Ding;R. Huí;Z. N. Zhang
影响因子：
1.8
作者：
L. Li
通讯作者：
L. Li
影响因子：
3.4
作者：
H. Chao;C. You;C. Sun
通讯作者：
H. Chao;C. You;C. Sun
影响因子：
5.8
作者：
Hein, JR;Normark, WR;Powell, CL
通讯作者：
Powell, CL
影响因子：
4.2
作者：
Anna Zoporowski;S. A. Miller
通讯作者：
Anna Zoporowski;S. A. Miller