为深入了解近年来国内土壤磁学研究的现状和发展趋势,以中国学术期刊全文数据库(CNKI)和Web of Science(WoS)为数据源,以1979—2019年1138篇研究论文为研究对象,采用文献计量分析法,运用CiteSpace文献计量可视化软件,进行机构、主题词...为深入了解近年来国内土壤磁学研究的现状和发展趋势,以中国学术期刊全文数据库(CNKI)和Web of Science(WoS)为数据源,以1979—2019年1138篇研究论文为研究对象,采用文献计量分析法,运用CiteSpace文献计量可视化软件,进行机构、主题词、关键词聚类分析。研究发现:国内土壤磁学研究发文量分为三个阶段,1979—1993年为萌芽阶段,发文量较少,Web of Science(WoS)数据库检索结果少见国内学者发表相关文章;1994—2014年为探索阶段,发文数量螺旋上升,共607篇;2015—2019年为第三阶段,发文419篇,此阶段发文量大幅度增加,2018年最高103篇。发文量前五的机构分别为中国科学院、中国地质大学、兰州大学、陕西师范大学、福建师范大学,发文量占总发文量的30%,但各科研机构和高校之间合作不紧密;关键词突发性检测分析发现环境磁学、重金属关键词突现,表明土壤磁学的应用领域向环境磁学渗透,随着研究的深入,将土壤粒度、土壤磁化率、重金属含量结合的土壤环境监测手段受到关注;主题词分析得出土壤磁学研究主题逐步从稻田土壤、黄土土壤的磁化率剖面特征过渡到城市土壤重金属检测,土壤侵蚀等方面。未来可在世界遗产地、自然保护区等区域开展土壤磁学环境监测研究以及将土壤磁测技术与水土流失研究耦合运用到西南喀斯特石漠化地区,为石漠化治理提供新方法。展开更多
The alteration of iron bearing minerals induced by hydrocarbon microseepage above oil/gas reservoirs has been evaluated using measurements of soil magnetic susceptibility κ , geochemical compositions (gas hydroca...The alteration of iron bearing minerals induced by hydrocarbon microseepage above oil/gas reservoirs has been evaluated using measurements of soil magnetic susceptibility κ , geochemical compositions (gas hydrocarbon and alteration carbonate Δ C ), and composition and concentration of iron bearing minerals. The analyses were performed along two profiles across the Qiangtang basin in Tibet, China: the Nuoermahu Xuehuanhu profile (C) and the Mugari Huochetoushan profile (E). Results show that three strong magnetic anomalies (C 1, E 1 and E 2 anomalies) are related to the distribution of Neogene volcanic rocks on the surface in the Gangmacuo Xiyaergang uplift. Two other anomalies (C 2 and E 4 anomalies), characterized by both moderately amplitude magnetic susceptibility and elevated soil gas hydrocarbons, occur near fault zones in the Cuoni Donghu synclinorium. These latter anomalies display characteristics of hydrocarbon microseepage anomalies commonly associated with oil and gas accumulations. Their presence in the Cuoni Donghu synclinorium suggests that parts of the Qiangtang basin may have significant petroleum potential.展开更多
文摘为深入了解近年来国内土壤磁学研究的现状和发展趋势,以中国学术期刊全文数据库(CNKI)和Web of Science(WoS)为数据源,以1979—2019年1138篇研究论文为研究对象,采用文献计量分析法,运用CiteSpace文献计量可视化软件,进行机构、主题词、关键词聚类分析。研究发现:国内土壤磁学研究发文量分为三个阶段,1979—1993年为萌芽阶段,发文量较少,Web of Science(WoS)数据库检索结果少见国内学者发表相关文章;1994—2014年为探索阶段,发文数量螺旋上升,共607篇;2015—2019年为第三阶段,发文419篇,此阶段发文量大幅度增加,2018年最高103篇。发文量前五的机构分别为中国科学院、中国地质大学、兰州大学、陕西师范大学、福建师范大学,发文量占总发文量的30%,但各科研机构和高校之间合作不紧密;关键词突发性检测分析发现环境磁学、重金属关键词突现,表明土壤磁学的应用领域向环境磁学渗透,随着研究的深入,将土壤粒度、土壤磁化率、重金属含量结合的土壤环境监测手段受到关注;主题词分析得出土壤磁学研究主题逐步从稻田土壤、黄土土壤的磁化率剖面特征过渡到城市土壤重金属检测,土壤侵蚀等方面。未来可在世界遗产地、自然保护区等区域开展土壤磁学环境监测研究以及将土壤磁测技术与水土流失研究耦合运用到西南喀斯特石漠化地区,为石漠化治理提供新方法。
文摘The alteration of iron bearing minerals induced by hydrocarbon microseepage above oil/gas reservoirs has been evaluated using measurements of soil magnetic susceptibility κ , geochemical compositions (gas hydrocarbon and alteration carbonate Δ C ), and composition and concentration of iron bearing minerals. The analyses were performed along two profiles across the Qiangtang basin in Tibet, China: the Nuoermahu Xuehuanhu profile (C) and the Mugari Huochetoushan profile (E). Results show that three strong magnetic anomalies (C 1, E 1 and E 2 anomalies) are related to the distribution of Neogene volcanic rocks on the surface in the Gangmacuo Xiyaergang uplift. Two other anomalies (C 2 and E 4 anomalies), characterized by both moderately amplitude magnetic susceptibility and elevated soil gas hydrocarbons, occur near fault zones in the Cuoni Donghu synclinorium. These latter anomalies display characteristics of hydrocarbon microseepage anomalies commonly associated with oil and gas accumulations. Their presence in the Cuoni Donghu synclinorium suggests that parts of the Qiangtang basin may have significant petroleum potential.
