检索结果-南通市图书馆

Carbon preservation in sedimentary deposits: Beyond mineral protection

在线全文

学校读者我要写书评

暂无评论

The Innovation 2024年第2期5卷 5-6页

作者： Yunpeng Zhao Juan jia Chengzhu liu Xiaojuan Feng State Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of SciencesBeijing 100093China China National Botanical Garden Beijing 100093China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China

The deposition and preservation of organic carbon(OC)in sedimentary environments(including soils and sediments)play major roles in mediating the global carbon *** than 90%of OC burial in the ocean occurs in continental margin sediments,which contributes to the evolution of the Earth’s atmosphere,such as oxygen content,over geological timescales.1 However,how OC escapes mineralization and persists in such sedimentary deposits has long been a *** protection through physicochemical associations of organic matter with minerals and cations is considered to be one of the primary mechanisms contributing to the environmental persistence of sedimentary OC.

关键词： sedimentary mineralization environments

Historical biogeography and evolutionary diversification of Lilium(Liliaceae): New insights from plastome phylogenomics

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Plant Diversity 2024年第2期46卷 219-228页

作者： Nian Zhou Ke Miao Changkun liu Linbo jia Jinjin Hu Yongjiang Huang Yunheng Ji CAS Key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of SciencesKunmingYunnan 650201China University of chinese Academy of sciences Beijing 100049China Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education College of Life SciencesSichuan UniversityChengduSichuan 610065China Yunnan Key Laboratory for Integrative Conservation of Plant Species with Extremely Small Population Kunming Institute of BotanyChinese Academy of SciencesKunmingYunnan 650201China

Here, we infer the historical biogeography and evolutionary diversification of the genus Lilium. For this purpose, we used the complete plastomes of 64 currently accepted species in the genus Lilium(14plastomes were newly sequenced) to recover the phylogenetic backbone of the genus and a timecalibrated phylogenetic framework to estimate biogeographical history scenarios and evolutionary diversification rates of Lilium. Our results suggest that ancient climatic changes and geological tectonic activities jointly shaped the distribution range and drove evolutionary radiation of Lilium, including the Middle Miocene Climate Optimum(MMCO), the late Miocene global cooling, as well as the successive uplift of the Qinghai-Tibet Plateau(QTP) and the strengthening of the monsoon climate in East Asia during the late Miocene and the Pliocene. This case study suggests that the unique geological and climatic events in the Neogene of East Asia, in particular the uplift of QTP and the enhancement of monsoonal climate, may have played an essential role in formation of uneven distribution of plant diversity in the Northern Hemisphere.

关键词： Asian monsoon Climatic changes Distribution range Evolutionary complexity Radiative diversification Species diversity Qinghai-Tibet Plateau(QTP)

Impact of volcanism on the formation and hydrocarbon generation of organic-rich shale in the Jiyang Depression, Bohai Bay Basin, China

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2024年第3期21卷 1539-1551页

作者： jia-Hong Gao Xin-Ping Liang Zhi-Jun Jin Quan-You liu Chang-Rong Li Xiao-Wei Huang Ju-Ye Shi Peng Li State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Efficient Development Institute of EnergyPeking University Petroleum Exploration and Production Research institute SINOPECBeijing100871 China School of Energy Resources China University of Geosciences Beijing100083 China

Globally,most organic-rich shales are deposited with volcanic ash *** ash,a source for many sedimentary basins,can affect the sedimentary water environment,alter the primary productivity,and preserve the organic matter(OM)through physical,chemical,and biological *** an increasing number of breakthroughs in shale oil exploration in the Bohai Bay Basin in recent years,less attention has been paid to the crucial role of volcanic impact especially its influence on the OM enrichment and hydrocarbon ***,we studied the petrology,mineralogy,and geochemical characteristics of the organic-rich shale in the upper submember of the fourth member(Es_(4)^(1))and the lower submember of the third member(Es_(3)^(3))of the Shahejie Formation,aiming to better understand the volcanic impact on organic-rich shale *** results show that total organic carbon is higher in the upper shale intervals rich in volcanic ash with enriched light rare earth elements and moderate Eu *** indicates that volcanism promoted OM formation before or after the *** positive correlation between Eu/Eu*and Post-Archean Australian Shale indicates hydrothermal activity before the volcanic *** plane graph of the hydrocarbon-generating intensity(S1+S2.suggests that the heat released by volcanism promoted hydrocarbon ***,the nutrients carried by volcanic ash promoted biological blooms during Es_(4)^(1 )and Es_(3)^(3) deposition,yielding a high primary *** blooms consume large amounts of oxygen and form anoxic environments conducive to the burial and preservation of ***,this study helps to further understand the organic-inorganic interactions caused by typical geological events and provides a guide for the next step of shale oil exploration and development in other lacustrine basins in China.

关键词： Volcanic ash Hydrocarbon generation Organic-rich shale Shahejie Formation Jiyang Depression

A static and dynamic factorscoupled forecasting model of regional rainfall-induced landslides:A case study of Shenzhen

在线全文

学校读者我要写书评

暂无评论

Science China(Technological sciences) 2008年第S2期51卷 164-175页

作者： jia GuiYun,TIAN Yuan,liu Yu & ZHANG Yi {2. of Remote Sensing and GIS,Peking University,beijing 100871,China institute of Remote Sensing and GIS Peking University Beijing 100871 China

Most rainfall-induced landslide forecasting models focus on the relation between landslides and rainfall,which is one of the dynamic factors,and seldom consider the stacitc factors,such as geological and geograpical *** susceptibility,however,is determinded by both static and dynamic *** article proposes a static and dynamic factors-coupled forecasting model(SDFCFM) of regional rainfall-induced landslides,which quantitatively considers both the static and dynamic factors that affect *** generalized additive model(GAM) is applied to coupling both factors to get the landslide *** the case study,SDFCFM is applied to forecast the landslide occurrences in Shenzhen during a rainfall process in *** with the rainfall logistic regression model,the resulting landslide susceptibility map illustrates that SDFCFM can reduce the forecast redundancy and improve the hit *** is both applicable and *** application of SDFCFM in landslide warning and prevention system will improve its efficiency and also cut down the cost of human and matreial resources.

关键词： regional rainfall-induced landslides static and dynamic factors-coupled forcasting model(SDFCFM) generalized additive model(GAM) landslide susceptibility

Tectonic framework of Qilian orogen: reveal from an aeromagnetic anomaly feature

在线全文

学校读者我要写书评

暂无评论

Applied Geophysics 2024年第3期21卷 528-548,618,619页

作者： Yang Hai Xiong Shengqing liu Qiankun Zhou Daoqing Yang Xue Fan Zhengguo jia Zhiye Li fang Gao xiuhe liu fuxiang China Aero Geophysical Survey and Remote Sensing Center for Natural Resource Beijing100083China State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing100029China

The Qilian Orogenic belt is one of the typical orogenic belts globally and a natural laboratory for studying plate *** researchers have studied the ophiolite and high pressure and ultra-high pressure metamorphic rocks in the Qilian orogen and obtained valuable ***,a hot debate exists on the basement property,the distribution of ophiolite,and the boundaries of tectonic ***-scale high-precision aeromagnetic surveys have recently been conducted in the Qilian Orogenic belt and adjacent *** this study,we are trying to analysis the tectonic framework of the Qilian Orogen using 1:500,000 aeromagnetic *** results provide geophysical perspectives for studying the structural framework and deformation of this *** to the aeromagnetic∆T anomaly map,the central and Southern Qilian have the same magnetic anomaly feature that noticeably differs from the North Qilian Orogenic belt and the Qaidam *** result indicates that the central and Southern Qilian have a unified magnetic basement and differ from the North Qilian orogenic belt and Qaidam *** map shows the distribution of ophiolite in the North Qilian orogenic *** magnetic anomalies represent the ophiolites because the mafic–ultramafic rocks usually have high magnetic *** ophiolite belts are continuously distributed in the western part of North Qilian orogenic belt and have a large ***,the scale of the ophiolite belt and the outcropping of mafic–ultramafic rocks reduces when they pass through Qilian County to the *** results indicate differences in the evolution process between the eastern and western parts of North Qilian,with Qilian County as the transition *** study also systematically defines the geophysical boundaries of the Qaidam Block,Qilian Block,North Qilian Orogenic belt,and Alxa *** is proposed that the sinistral displacement of the Altun Fault is adjusted and absorbed by the series of NE-trending fau

关键词： Qilian orogen tectonic framework aeromagnetic anomaly feature mafic–ultramafic

ASSESSMENT OF ENVIRONMENTAL QUALITY FOR EARTHQUAKE RISK IN beijingAREA──THE APPLICATION OF GEOGRAPHIC INFORMATION SYSTEM（GIS）

在线全文

学校读者我要写书评

暂无评论

地震地质 1994年第3期 211-213+2174+215页

作者： Han Zhujun jiang Pu Wang Liangmou Yu Keta liu Peixun（{2. of geology. SSB． beijing 10002.）

ＡＳＳＥＳＳＭＥＮＴＯＦＥＮＶＩＲＯＮＭＥＮＴＡＬＱＵＡＬＩＴＹＦＯＲＥＡＲＴＨＱＵＡＫＥＲＩＳＫＩＮＢＥＩＪＩＮＧＡＲＥＡ──ＴＨＥＡＰＰＬＩＣＡＴＩＯＮＯＦＧＥＯＧＲＡＰＨＩＣＩＮＦＯＲＭＡＴＩＯＮＳＹＳＴＥＭ（... 详细信息

ＡＳＳＥＳＳＭＥＮＴＯＦＥＮＶＩＲＯＮＭＥＮＴＡＬＱＵＡＬＩＴＹＦＯＲＥＡＲＴＨＱＵＡＫＥＲＩＳＫＩＮＢＥＩＪＩＮＧＡＲＥＡ──ＴＨＥＡＰＰＬＩＣＡＴＩＯＮＯＦＧＥＯＧＲＡＰＨＩＣＩＮＦＯＲＭＡＴＩＯＮＳＹＳＴＥＭ（ＧＩＳ）ＨａｎＺｈｕｊｕｎ；Ｊｉａ...

关键词： :Geographic Information System(GIS).beijing area Earthquakc risk.Environment

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

致密砂岩储层岩石相建模新思路

中国石油大学学报（自然科学版） 2024年第4期48卷 33-42页

作者：刘子豪吴胜和郭睿徐振华徐振永刘建党贾超刘照玮中国石油勘探开发研究院北京100083 中国石油大学(北京)地球科学学院北京102249 长江大学地球科学学院湖北武汉434023 中国石化勘探开发研究院北京100083 金航数码科技有限责任公司北京100028

致密砂岩储层中岩石相的类型多样,空间相变很快,井间预测难度较大,常规的建模思路和方法难以进行准确的表征和三维地质建模。以鄂尔多斯盆地大牛地气田DK13井区为例,综合岩心、测井、野外露头资料等,共划分4种岩石相类型,包括小砾—巨... 详细信息

致密砂岩储层中岩石相的类型多样,空间相变很快,井间预测难度较大,常规的建模思路和方法难以进行准确的表征和三维地质建模。以鄂尔多斯盆地大牛地气田DK13井区为例,综合岩心、测井、野外露头资料等,共划分4种岩石相类型,包括小砾—巨砂岩相、粗砂岩相、中—细砂岩相和粉砂—泥岩相,明确各岩石相的构型分布特征。在此基础上提出“分区约束,逐级嵌入”的岩石相建模新思路:在岩石相平面分布最大边界的约束下,分别在小砾—巨砂岩相和粗砂岩相边界内进行相建模,然后将各岩石相模型依次嵌入中—细砂岩相模型中完成建模。结果表明:本次模型与地质分布特征和规律相符合,也具有较高的精度和稳定性,单层岩石相的平均吻合率超过90%;与常规建模方法相比,该思路在井间岩石相的预测中不是应用完全随机的方法,而是更多地应用了构型分析的成果,能够大幅提高井间岩石相预测的准确度,再现岩石相的复杂空间分布样式。

关键词：致密砂岩岩石相储层建模大牛地气田储层构型

Groundwater Quality and Vulnerability Assessment in a Semiarid Karst Region of Northern China

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Journal of Earth Science 2024年第1期35卷 313-316页

作者： Ran An Shu Wang Zongjun Gao Zhenyan Wang Wei Li Qijun Deng Lü Lin Yuanqing liu Key Laboratory of Water Cycle and Related Land Surface Processes Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China Shandong University of Science and Technology Qingdao 266510China Center for Hydrogeology and Environmental geology Survey China Geological SurveyBaoding 071051China

Groundwater plays a critical role in maintaining ecological balance and ensuring social operations,especially in arid and semiarid regions(Hu et al.,2.2.;Han et al.,2.2.;Ma et al.,2.14).The over-exploitation of groundwater,coupled with the influx of pollutants from human activities into the soil,significantly degrades the environment in certain regions(jia et al.,2.19;Famiglietti,2.14;Giordano,2.09;Konikow and Kendy,2.05;Bohlke,2.02.Shah et al.,2.00).

关键词： groundwater Groundwater Vul

钱家店及外围红杂色含铀目标层位重新划分及其地质意义

在线全文

学校读者我要写书评

暂无评论

地球科学 2024年第4期49卷 1277-1291页

作者：肖菁秦明宽郭强严张磊贾立城刘鑫邢作昌核工业北京地质研究院北京100029 中核集团铀资源勘查与评价技术重点实验室北京100029 核工业二四三大队内蒙古赤峰024000

钱家店铀矿床及外围地区含矿目标层位划分不明已成为当前生产和科研迫切需要解决的关键问题.为准确厘定含矿层位,综合运用地层学、沉积学、砂岩型铀成矿理论,采取岩性、测井、古生物和其他多手段相结合的多重地层对比方法,系统分析了含... 详细信息

钱家店铀矿床及外围地区含矿目标层位划分不明已成为当前生产和科研迫切需要解决的关键问题.为准确厘定含矿层位,综合运用地层学、沉积学、砂岩型铀成矿理论,采取岩性、测井、古生物和其他多手段相结合的多重地层对比方法,系统分析了含矿目标层位的识别特征和划分依据.研究成果证明目前被统归划分为姚家组的含铀红杂色层可以识别并划分出泉头组、青山口组和姚家组,并在此基础上重新厘定了区域上不同矿体的层位归属和矿化特征.该研究可为松辽盆地南部铀矿勘查突破提供新的找矿思路和地质依据,在此新层位体系下进一步开展成矿规律研究,或许能真正有助于揭示长期以来悬而未决的板状铀矿体成因.

关键词：钱家店铀矿床红杂色层地层划分孢粉化石灰色砂体矿床学