检索结果-南通市图书馆

Nd Isotopic and Model Age Study of the Shandong Province, North China Craton: Implications for Correlation with South Korea

引用

Journal of Earth Science 2019年第5期30卷 938-951页

作者： Feifei Liu yaoqi zhou School of Geosciences China University of Petroleum Qingdao 266580 China Function Laboratory for Marine Mineral Resource Geology and Exploration National Laboratory for Marine Science and Technology Qingdao 266071 China

The geological units in Shandong Province, North China are important parts of the North China Craton and offer important insights into their crustal evolutionary history. This paper presents 611 sets of Nd isotopic data of Archean–Mesozoic rocks from Shandong including the Luxi, Jiaobei, and Sulu terranes, which provides important constraints for crustal growth and reactivation. Nd-depleted mantle model ages(TDM) of Archean rocks with positive εNd(t) values showed that ca. 2.9 and 2.8–2.7 Ga were the most important periods of crustal growth in the Jiaobei and Luxi terranes, respectively, while the period of ca. 2.6–2.5 Ga in the Jiaobei terrane likely indicates a coherent event of crustal growth and reworking. During the Proterozoic, multi-stage rifting and collisional orogenic events possibly led to the reworking of Archean crust in the source region. The Nd isotopic data of the Paleoproterozoic and Neoproterozoic rocks from Sulu indicated significant reworking of older crust with juvenile magmatic input. Crustal reactivation occurred during the Mesozoic. The younger TDM ages of the Mesozoic rocks with low negative εNd(t) values indicate that a juvenile crustal/mantle component was added to the ancient basement. The reactivation reflectes significant crust-mantle interaction via the mechanism of crustal subduction and mantle-derived magma underplating, or possibly asthenospheric upwelling. In addition, the crustal correlation between Shandong and Korea(including the Gyeonggi massif, Ogcheon belt, and Yeongnam massif) is established in this study. The TDM age distribution provides evidence favoring the affinity relationship between the Gyeonggi massif and Ogcheon belt of South Korea and the Jiaobei and Sulu terranes of Shandong, while the Yeongnam massif is more correlated with the South China Block.

关键词： Nd model age crustal growth crust reactivation Shandong geochemistry Korea

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

3 = 1 + 2: how the divide conquered de novo protein structure prediction and what is next?

引用

National Science Review 2023年第12期10卷 60-65页

作者： yaoqi zhou Thomas Litfin Jian Zhan Institute of Systems and Physical Biology Shenzhen Bay Laboratory Institute for Glycomics Griffith University

Protein structure prediction has been a challenging problem for>60 years. Its progress has been considered incremental for the past 20 years until leaps were made by Alpha Fold that seemed to suddenly reach experimental accuracy. We argue that this unexpected success in 3D structure prediction was foreshadowed by prior advances in predicting 1D backbone structures and 2D side-chain distance maps in continuous angle and distance space as well as the embedding of these 1D and 2D features for end-to-end learning.

关键词：

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Hydrothermal Origin of Early Permian Chert Nodules in the Central North China Craton Linked to Northern Margin Cratonic Activation

引用

Acta Geologica Sinica(English Edition) 2021年第2期95卷 541-557页

作者： YAO Xu LI Su zhou yaoqi Linda A.HINNOV School of Earth Sciences Lanzhou UniversityLanzhou 73000China Key Laboratory of Mineral Resources in Western China(Gansu Province) Lanzhou UniversityLanzhou 730000China School of Geosciences China University of PetroleumQingdaoShandong 266580China Department of Atmosphere Ocean and Earth SciencesGeorge Mason UniversityFairfaxVirginia 22030USA

Sedimentary chert phases from the Archean to the present are widely used to trace sedimentary environments and tectonic ***,chert nodules occurring within carbonates have been the subject of possible hydrothermal or biogenic origin,in lieu of a diagenetic ***,chert nodules from a vast cratonic basin represent extremely rich silica accumulations but less noted is how they respond to submarine hydrothermal activity(and/or surface siliceous organism productivity).The links between the cratonic-type chert depositions and environmental changes regarding cratonic evolution need to be revisited at a large temporal-spatial *** chert nodules are widespread throughout the Lower Permian Taiyuan Formation in the North China Craton(NCC).Several Taiyuan chert-rich successions across the NCC have been selected to study possible links between chert deposition and cratonic evolution in scenario of partial cratonic activation of the northern NCC margin during the Late *** on stratigraphic correlation,the chert nodules are ubiquitously,evenly distributed throughout the Taiyuan Formation at a large craton-basin scale from the northern to southern interior *** results,elemental abundances,together with silicon and oxygen isotopic compositions of chert samples infer significant hydrothermal contributions for the silica ***,the cratonic-scale chert depositions of hydrothermal origin infer a giant and remote silica reservoir,linking to the large igneous province and magmatism in the NCC northern *** Taiyuan chert nodules could be unique marine sedimentary archives recording the Late Paleozoic NCC partial activation,which also generated continental records of igneous rocks,bauxites and *** strong tectonics of the northern margin,south-dipping topography and northward transgression of the Early Permian NCC facilitated the chert deposition on the shallow marine platform in the cratonic interior.

关键词： chert silicification silicon and oxygen isotopes hydrothermal scenarios partial activation North China Craton

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Late Jurassic to early Cretaceous magnetostratigraphy of scientific drilling core LK-1 in the Lingshan Island of Riqingwei Basin,eastern China

引用

Science China Earth Sciences 2022年第4期65卷 742-758页

作者： Yanjun CHENG Zhiping WU Xiaoyu LIU yaoqi zhou Yining DAI Tongjie ZHANG Tengfei zhou College of Earth Science and Engineering Shandong University of Science and TechnologyQingdao 266590China School of Geosciences China University of Petroleum(East China)Qingdao 266580China

The Sulu orogenic belt is an uplift zone that was formed in the Late *** Jurassic to Cretaceous sedimentary successions have been recognized within the Sulu orogenic belt in recent studies,including outcrops that are considered to be related to the newly discovered Riqingwei *** basin has been the focus of extensive study due to its continuous Cretaceous rock sequence,geological location and petroleum resource ***,the lack of a consolidated chronology for the strata has precluded a better understanding of stratigraphy,tectonic evolution and resource potential of the Riqingwei ***,we present the results of a new magnetostratigraphic study of the continental scientific drilling borehole LK-1,which is located on Lingshan Island,offshore Shandong province,eastern *** goals of this study are to(1)refine the Late Jurassic to Early Cretaceous chronostratigraphic framework of the Riqingwei Basin,and(2)investigate the location of the J/K boundary in the Borehole Core *** observed patterns of the paleomagnetic polarity zone in the LK-1 borehole correlate well with the geomagnetic polarity time scale(GPTS),and the continuous magnetostratigraphy profile defined in this core indicates an age ranging from 146.5 to 125.8 Ma for the samples *** sediment accumulation rates(SAR)of LK-1 show one period of high SAR(~10.5 cm kyr^(-1))at 135.3–130.6 Ma and two periods of low SAR(~4.8 and~2.2 cm kyr^(-1))at145.7–135.3 and 130.6–125.8 Ma,*** addition,the magnetostratigraphic results suggest that the Jurassic-Cretaceous(J/K)boundary of the LK-1 is located within the magnetozone N21.2 n(~1254 m).This comprehensive geochronologic framework provides a good correlation of the marine Upper Jurassic to Lower Cretaceous strata in the Riqingwei Basin to other marine strata and continental sequences,in addition to providing a foundation for the study of the structural evolution of eastern China.

关键词： Magnetostratigraphy Continental Scientific Drilling borehole LK-1 J/K boundary Late Jurassic to Early Cretaceous Riqingwei Basin

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

SPOT-Disorder2: Improved Protein Intrinsic Disorder Prediction by Ensembled Deep Learning

引用

Genomics, Proteomics & Bioinformatics 2019年第6期17卷 645-656页

作者： Jack Hanson Kuldip K.Paliwal Thomas Litfin yaoqi zhou Signal Processing Laboratory Griffith UniversityBrisbane 4111Australia School of Information and Communication Technology Griffith UniversityGold Coast 4222Australia Institute for Glycomics Griffith UniversityGold Coast 4222Australia

Intrinsically disordered or unstructured proteins(or regions in proteins) have been found to be important in a wide range of biological functions and implicated in many diseases. Due to the high cost and low efficiency of experimental determination of intrinsic disorder and the exponential increase of unannotated protein sequences, developing complementary computational prediction methods has been an active area of research for several decades. Here, we employed an ensemble of deep Squeeze-and-Excitation residual inception and long short-term memory(LSTM) networks for predicting protein intrinsic disorder with input from evolutionary information and predicted one-dimensional structural properties. The method, called SPOT-Disorder2, offers substantial and consistent improvement not only over our previous technique based on LSTM networks alone,but also over other state-of-the-art techniques in three independent tests with different ratios of disordered to ordered amino acid residues, and for sequences with either rich or limited evolutionary information. More importantly, semi-disordered regions predicted in SPOT-Disorder2 are more accurate in identifying molecular recognition features(MoRFs) than methods directly designed for MoRFs prediction. SPOT-Disorder2 is available as a web server and as a standalone program at https://***/server/spot-disorder2/.

关键词： Intrinsic disorder Molecular recognition feature Machine learning Deep learning Protein structure

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

MARS and RNAcmap3:The Master Database of All Possible RNA Sequences Integrated with RNAcmap for RNA Homology Search

引用

Genomics, Proteomics & Bioinformatics 2024年第1期22卷 143-150页

作者： Ke Chen Thomas Litfin Jaswinder Singh Jian Zhan yaoqi zhou Institute of Systems and Physical Biology Shenzhen Bay LaboratoryShenzhen 518055China Peking University Shenzhen Graduate School Shenzhen 518055China University of Science and Technology of China Hefei 230026China Suzhou Institute for Advanced Research University of Science and Technology of ChinaSuzhou 215123China Institute for Glycomics Griffith UniversitySouthportQLD 4222Australia

sequences found in the huge,integrated database of protein sequences(Big Fantastic Database).In contrast,the existing nucleotide databases were not consolidated to facilitate wider and deeper homology ***,we built a comprehensive database by incorporating the non-coding RNA(ncRNA)sequences from RNAcentral,the transcriptome assembly and metagenome assembly from metagenomics RAST(MG-RAST),the genomic sequences from Genome Warehouse(GWH),and the genomic sequences from MGnify,in addition to the nucleotide(nt)database and its subsets in National Center of Biotechnology Information(NCBI).The resulting Master database of All possible RNA sequences(MARS)is 20-fold larger than NCBI’s nt database or 60-fold larger than *** new dataset along with a new split-search strategy allows a substantial improvement in homology search over existing state-of-the-art *** also yields more accurate and more sensitive multiple sequence alignments(MSAs)than manually curated MSAs from Rfam for the majority of structured RNAs mapped to *** results indicate that MARS coupled with the fully automatic homology search tool RNAcmap will be useful for improved structural and functional inference of ncRNAs and RNA language models based on *** is accessible at https://***/omix/release/OMIX003037,and RNAcmap3 is accessible at http://***/download/.

关键词： RNA sequence database Homology search Secondary structure MARS RNAcmap3

来源：

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

Cenozoic potassic volcanic rocks from the Keluo and Wudalianchi volcanic districts,northeast China:origin from the new sub-continental lithospheric mantle(SCLM)metasomatized by potassium-rich fluids from delaminated lower crust

引用

Frontiers of Earth Science 2022年第4期16卷 989-1004页

作者： Fanchao MENG Yulu TIAN yaoqi zhou Jiaqi LIU Gengchao ZUO Qing DU School of Geosciences China University of Petroleum(East China)Qingdao 266580China Pilot National Laboratory for Marine Science and Technology(Qingdao) Qingdao 266061China Shandong Provincial Key Laboratory of Deep Oil and Gas China University of Petroleum(East China)Qingdao 266580China Institute of Geology Chinese Academy of Geological SciencesBeijing 100037China

A series of Cenozoic potassium-rich volcanic rocks developed in the Xiaoguli-Keluo-Wudalianchi-Erkeshan districts,northeast *** source region and potassium-rich mechanism of the potassic rocks remain highly *** this paper,the major elements,trace elements,and Sr-Nd-Pb isotopes of the volcanic rocks in Keluo(KL)and Wudalianchi(WDLC)volcanic districts were analyzed *** results show that the volcanic rocks are characterized by high K2O(4.36wt.%-6.13wt.%),remarkable enrichment in LREEs and LILEs,as well as the strong fractionation of *** isotopic characteristics with high 87Sr/86Sr(0.704990-0.705272),low 143Nd/144Nd(0.512306-0.512417),low 206Pb/204Pb(16.546-17.135)and 207Pb/204Pb(15.002-15.783)of the volcanic rocks suggest the involvement of EM-I-type *** the basis of the geochemical characteristics,the potassium-rich volcanic magma originated from the new SCLM forming after delamination of the ancient SCLM,with metasomatism of the potassium-rich fluids released from the ancient lower crust during the Late *** proposed genetic model assumes the source which represented by a phlogopite-bearing garnet peridotite(with modal garnet in the range of 2%-10%)experienced very low degrees(i.e.,~0.5)of partial *** Cenozoic,the lithosphere in northeast China was affected by the extension and decompression of continental rift,and the metasomatized SCLM underwent low degree partial melting,resulting in the formation of potassium-rich primitive basaltic magma.

关键词： northeast China Keluo-Wudalianchi volcanic districts Cenozoic potassic volcanic rocks petrogenesis sub-continental lithospheric mantle

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Discovery of gas-discharged pits(gas pit)in the plains of the Yellow River delta

引用

Chinese Science Bulletin 1999年第15期44卷 1403-1406,1441页

作者： Jianhua Zhong yaoqi zhou Shoujun Li Shaolan Wang Univ Petr Dept Resources Dongying 257062 Peoples R China

A kind of special sedimentary structures are developed in the overwater plains of the Yellow River delta. They look like funnels: round or nearly round, concave of pit-like, with a diameter ranging from several centimeters to 20 or 30 cm, and depth from several millimeters to over 20 cm. There is a vertical pipe (called gas discharging conduit) in the center, with a diameter of several millimeters to 1 cm, depth of several centimeters to more than 10 cm. There may be a lip-like relief (called 'lip-like relief') on the periphery or some parts of the periphery, with ring structures showing horizontal stratification on the inner margin. Plant debris carbonized, plant fragments or dark-colored minerals may sometimes be found in the center of the pits. Such structures are usually developed in silt (with minor clay laminations), often underlain by one or more thin layers of mud matter. Our studies find that they are genetically related with gas discharging of organic matter during biological degradation.

关键词： gas-discharged pits overwater plains delta the Yellow River.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Research on energy structure and development strategy from 2010 to 2015 in Qingdao, China

引用

Chinese Journal of Population,Resources and Environment 2017年第3期15卷 239-248页

作者： Feifei Liu yaoqi zhou Zhenkai Zhang Tengfei zhou School of Geosciences China University of Petroleum Function Laboratory for Marine Mineral Resource Geology and Exploration Qingdao National Laboratory of Marine Science and Technology

With the fast development of Qingdao's economy, the energy consumption is increasing significantly. In this paper, based on the energy statistic data in Qingdao area from 2010 to 2015,energy consumption structure was analyzed, indicating the existence of single energy structure;that is, coal, petroleum, and natural gas are dominant in the area. Thus, some issues between energy supply and demand have been brought. To solve present problem, we put forward to formulate the development strategy of energy, including energy savings, the exploitation of petroleum and natural gas resources, the development and utilization of renewable energy sources, and energy policy. It is worthy of mentioning that, according to the geological investigation, the shale gas may be abundant in Qingdao area and the gas resource amount estimated is huge. This is our first finding, important for developing unconventional energy and adjusting the energy structure in Qingdao in the future. Therefore, we suggest that Qingdao government should take action to develop local new energy resources for satisfying the energy demand.

关键词： Qingdao energyconsumption structure petroleum and gas renewable energy

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Coal-derived Gas Accumulation Characteristics and Exploration Prospects of Upper Paleozoic in Eastern Linqing Depression

引用

Acta Geologica Sinica(English Edition) 2015年第A1期89卷 448-449页

作者： LIANG Zhao zhou yaoqi LIU Chengang WANG Rui School of Geosciences China University of Petroleum Qingdao Shandong 266580 Research Institute of Geological Sciences SINOPEC Shengli Oilfield Company Dongying Shandong 257051

1 Introduction Bohai Bay Basin is the highest oil production basin in China, but the proven reserves and production of natural gas is far less than the size of the oil. In recent years, petroleum geologists found one after another in Wenan Slope of Jizhong Depression, Kongxi and Wumaying buried hills of Huanghua Depression, Gubei-Bonan buried hill of Jiyang Depression, Wenliu buried hill of Dongpu Depression oil and gas from coal-bearing source rock of Upper Paleozoic. It shows that Upper Paleozoic of Bohai Bay Basin has good exploration prospects.

关键词：

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：