Marine strata are widely exposed in the Hushan and Chaohu areas, Lower Yangtze region. As biomarker geochemistry of the strata has not been well documented, this paper deals with the biomarker composition of represent...Marine strata are widely exposed in the Hushan and Chaohu areas, Lower Yangtze region. As biomarker geochemistry of the strata has not been well documented, this paper deals with the biomarker composition of representative samples collected from the Silurian, Carboniferous and Triassic systems and their geological implications, thus providing clues to marine organic matter. On the basis of experimental results, it is shown that abundant biomarkers (e.g. n-alkanes, isoprenoids, terpanes and steranes) were detected. As organic matter in the strata is highly to over mature in general based on petrologic microobservation, some biomarkers (mainly n-alkanes) except terpanes and steranes cannot reflect the source, depositional environment and maturity of organic matter. Thus, primarily based on analyses of the terpanes and steranes, it is suggested that organic matter in the Silurian and Carboniferous strata is derived mainly from lower organisms, while higher plants are predominant in the Triassic organic matter. This further indicates that the depositional environment may have transformed from the marine to continental facies in the Late Triassic. These results provide new evidence for the study of regional depositional evolution, and have enriched the study of biological composition of organic matter. In addition, the biomarker geochemistry of organic matter at high to over maturation stage is addressed.展开更多
River is an important resource for human survival and development, and also a material carrier for cultural inheritance. In recent years, with the further urbanization of China, more efforts have been devoted in econo...River is an important resource for human survival and development, and also a material carrier for cultural inheritance. In recent years, with the further urbanization of China, more efforts have been devoted in economic construction, but protection of local ecological pattern and inheritance of historic context have been overlooked. Taking landscape design of Jinxi River in Hushan Town for example, local resources were analyzed on the basis of regional characteristics to explore the future development trend. Colorful traditional cultures of south Fujian should be introduced into the design of waterfront landscapes, so historic and cultural elements of south Fujian will be inherited and demonstrated in new means by combining with modern landscape design techniques.展开更多
木里煤田弧山矿区含多段全区可采煤层,厚度较大,具备煤层气成藏的基础条件。为了解区内煤层气成藏特征,结合地质调查、钻孔、样品分析及瓦斯测试等工作,研究本区煤层赋存特征、煤层气控矿因素及成藏模式。结果表明:弧山矿区煤层赋存特征...木里煤田弧山矿区含多段全区可采煤层,厚度较大,具备煤层气成藏的基础条件。为了解区内煤层气成藏特征,结合地质调查、钻孔、样品分析及瓦斯测试等工作,研究本区煤层赋存特征、煤层气控矿因素及成藏模式。结果表明:弧山矿区煤层赋存特征好,顶板岩石封盖性能较佳,储层埋深有利,含气量最高可达8.16 m 3/t,有一定的煤层气资源前景;受向斜及两翼发育的断层影响,南翼煤层含气量明显较北翼高;地下水水力封闭和水力封堵效果较明显,煤层气富集的向斜轴部为下步研究的重点。展开更多
基金funded by the National Natural Science Foundation of China (Grant Nos. 41072090 and 40872086)the Undergraduate Innovation Program of Nanjing Universitythe Open Project Program of Key Laboratory of Tectonics and Petroleum Resources (China University of Geosciences), Ministry of Education (Grant No. TPR-2010-26)
文摘Marine strata are widely exposed in the Hushan and Chaohu areas, Lower Yangtze region. As biomarker geochemistry of the strata has not been well documented, this paper deals with the biomarker composition of representative samples collected from the Silurian, Carboniferous and Triassic systems and their geological implications, thus providing clues to marine organic matter. On the basis of experimental results, it is shown that abundant biomarkers (e.g. n-alkanes, isoprenoids, terpanes and steranes) were detected. As organic matter in the strata is highly to over mature in general based on petrologic microobservation, some biomarkers (mainly n-alkanes) except terpanes and steranes cannot reflect the source, depositional environment and maturity of organic matter. Thus, primarily based on analyses of the terpanes and steranes, it is suggested that organic matter in the Silurian and Carboniferous strata is derived mainly from lower organisms, while higher plants are predominant in the Triassic organic matter. This further indicates that the depositional environment may have transformed from the marine to continental facies in the Late Triassic. These results provide new evidence for the study of regional depositional evolution, and have enriched the study of biological composition of organic matter. In addition, the biomarker geochemistry of organic matter at high to over maturation stage is addressed.
基金Sponsored by Key Disciplines of"The Twelfth Five-year Plan"of Hunan Province(Landscape Architecture)(2011NO76)Key Soft Science Programs of Hunan Province(2010ZK20207)2012–2014 Degree Program(Urban Planning Science)of Central South University of Forestry and Technology(2012NO69)
文摘River is an important resource for human survival and development, and also a material carrier for cultural inheritance. In recent years, with the further urbanization of China, more efforts have been devoted in economic construction, but protection of local ecological pattern and inheritance of historic context have been overlooked. Taking landscape design of Jinxi River in Hushan Town for example, local resources were analyzed on the basis of regional characteristics to explore the future development trend. Colorful traditional cultures of south Fujian should be introduced into the design of waterfront landscapes, so historic and cultural elements of south Fujian will be inherited and demonstrated in new means by combining with modern landscape design techniques.
文摘木里煤田弧山矿区含多段全区可采煤层,厚度较大,具备煤层气成藏的基础条件。为了解区内煤层气成藏特征,结合地质调查、钻孔、样品分析及瓦斯测试等工作,研究本区煤层赋存特征、煤层气控矿因素及成藏模式。结果表明:弧山矿区煤层赋存特征好,顶板岩石封盖性能较佳,储层埋深有利,含气量最高可达8.16 m 3/t,有一定的煤层气资源前景;受向斜及两翼发育的断层影响,南翼煤层含气量明显较北翼高;地下水水力封闭和水力封堵效果较明显,煤层气富集的向斜轴部为下步研究的重点。
