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Identification of the Caroline Plate boundary:constraints from magnetic anomaly

Acta Oceanologica Sinica 2024年第08期 1-12页

作者： yongtao fu Guoliang Zhang Wanyin Wang An Yang Tao He Zhangguo Zhou Xiao Han Key Laboratory of Ocean Observation and Forecasting/Key Laboratory of Marine Geology and Environment Institute of Oceanology Chinese Academy of Sciences National Engineering Research Center for Offshore Oil and Gas Exploration Laboratory for Marine Geology Qingdao National Laboratory for Marine Science and Technology Center of Deep Sea Research Institute of Oceanology Chinese Academy of Sciences Institute of Gravity and Magnetic Technology Key Laboratory of Western China's Mineral Resources and Geological Engineering of Ministry of Education School of Geology Engineering and Geomatics Chang'an University University of Chinese Academy of Sciences

The Caroline Plate is located among the Pacific Plate, the Philippine Sea Plate, and the India Australia Plate, and plays a key role in controlling the spreading direction of the Philippine Sea Plate. The Caroline Submarine Plateau(or Caroline Ridge) and the Eauripik Rise on the south formed a remarkable T-shaped large igneous rock province, which covered the northern boundary between the Caroline Plate and the Pacific Plate. However,relationship between these tectonic units and magma evolution remains unclear. Based on magnetic data from the Earth Magnetic Anomaly Grid(2-arc-minute resolution)(V2), the normalized vertical derivative of the total horizontal derivative(NVDR-THDR) technique was used to study the boundary of the Caroline Plate. Results show that the northern boundary is a transform fault that runs 1 400 km long in approximately 28 km wide along the N8° in E-W direction. The eastern boundary is an NNW-SSE trending fault zone and subduction zone with a width of tens to hundreds of kilometers; and the north of N4° is a fracture zone of dense faults. The southeastern boundary may be the Lyra Trough. The area between the southwestern part of the Caroline Plate and the Ayu Trough is occupied by a wide shear zone up to 100 km wide in nearly S-N trending in general. The Eauripik transform fault(ETF) in the center of the Caroline Plate and the fault zones in the east and west basins are mostly semi-parallel sinistral NNW-SSE–trending faults, which together with the eastern boundary Mussau Trench(MT)sinistral fault, the northern Caroline transform fault(CTF), and the southern shear zone of the western boundary,indicates the sinistral characteristics of the Caroline Plate. The Caroline hotspot erupted in the Pacific Plate near the CTF and formed the west Caroline Ridge, and then joined with the Caroline transform fault at the N8°. A large amount of magma erupted along the CTF, by which the east Caroline Ridge was formed. At the same time, a large amount of magma

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Identification of the Caroline Plate boundary:constraints from magnetic anomaly

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Acta Oceanologica Sinica 2024年第8期43卷 1-12页

作者： yongtao fu Guoliang Zhang Wanyin Wang An Yang Tao He Zhangguo Zhou Xiao Han Key Laboratory of Ocean Observation and Forecasting/Key Laboratory of Marine Geology and Environment Institute of OceanologyChinese Academy of SciencesQingdao 266071China National Engineering Research Center for Offshore Oil and Gas Exploration Beijing 100028China Laboratory for Marine Geology Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China Center of Deep Sea Research Institute of OceanologyChinese Academy of SciencesQingdao 266071China Institute of Gravity and Magnetic Technology Key Laboratory of Western China’s Mineral Resources and Geological Engineering of Ministry of EducationSchool of Geology Engineering and GeomaticsChang’an UniversityXi’an 710054China University of Chinese Academy of Sciences Beijing 100049China

The Caroline Plate is located among the Pacific Plate,the Philippine Sea Plate,and the India Australia Plate,and plays a key role in controlling the spreading direction of the Philippine Sea *** Caroline Submarine Plateau(or Caroline Ridge)and the Eauripik Rise on the south formed a remarkable T-shaped large igneous rock province,which covered the northern boundary between the Caroline Plate and the Pacific ***,relationship between these tectonic units and magma evolution remains *** on magnetic data from the Earth Magnetic Anomaly Grid(2-arc-minute resolution)(V2),the normalized vertical derivative of the total horizontal derivative(NVDR-THDR)technique was used to study the boundary of the Caroline *** show that the northern boundary is a transform fault that runs 1400 km long in approximately 28 km wide along the N8°in E-W *** eastern boundary is an NNW-SSE trending fault zone and subduction zone with a width of tens to hundreds of kilometers;and the north of N4°is a fracture zone of dense *** southeastern boundary may be the Lyra *** area between the southwestern part of the Caroline Plate and the Ayu Trough is occupied by a wide shear zone up to 100 km wide in nearly S-N trending in *** Eauripik transform fault(ETF)in the center of the Caroline Plate and the fault zones in the east and west basins are mostly semi-parallel sinistral NNW-SSE–trending faults,which together with the eastern boundary Mussau Trench(MT)sinistral fault,the northern Caroline transform fault(CTF),and the southern shear zone of the western boundary,indicates the sinistral characteristics of the Caroline *** Caroline hotspot erupted in the Pacific Plate near the CTF and formed the west Caroline Ridge,and then joined with the Caroline transform fault at the N8°.A large amount of magma erupted along the CTF,by which the east Caroline Ridge was *** the same time,a large amount of magma developed southward via the e

关键词： Caroline Plate magnetic anomaly normalized vertical derivative of the total horizontal derivative plate boundary Caroline Ridge Eauripik Rise

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Cretaceous Deepwater Lacustrine Dedimentary Sequences from the Northernmost South China Block, Qingdao, China

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Journal of Earth Science 2014年第2期25卷 241-251页

作者： Tuoyu Wu yongtao fu Department of Earth and Environmental Sciences University of Winsor N9B 3P4Canada Key Laboratory of Marine Geology and Environment Institute of Oceanology Chinese Academy of Sciences

A sequence of terrigenous siliciclastic rocks crop out at Baxiandun, Qingdao, near the Mesozoic collisional boundary between North China block （NCB） and South China block （SCB）. These low-grade metamorphosed siliciclastic rocks are dominated by greywacke with shale, man- ganiferous fine-grained sandstone, arkose and conglomerate layers. There are two basic interpreta- tions about the formation of these rocks. One considered that this sequence was formed within NCB, and is part of the Cretaceous Laiyang Group and Qingshan Group fluvial facies and volcanic debris facies, as shown on the Shandong Regional Geological Map. Another opinion suggested that these rocks represent turbidity depositional systems in the slope and the basin facies was mainly deposited in Ordovician. Based on field observation, petrological analysis, and most importantly, geochemical results in this study, the sedimentary strata at Baxiandun Section mainly consist of siltstone, sand- stone and mudstone lithologies. They are dominated by deepwater debris and turbidity deposits in the slope and base of a lake. The U-Pb detrital zircon dating of the rocks at the Baxiandun Section indicates that the source rocks are very complex and their ages are varied from Archean to Early Cretaceous. The youngest age of the terrigenous detritus could represent the age of the sedimentary strata. Therefore, we infer that the sedimentary rocks belong to Early Cretaceous deepwater lacus- trine sedimentary sequences and have multiple sources origined from the erosion of the Sulu UHP orogen and South China block margin.

关键词： Cretaceous turbidite deepwater lacustrine detrital zircon South China block.

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成形磨齿齿面残余应力测量与预测方法研究

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中国重型装备 2024年第1期 29-37页

作者：苏振华王东峰肖雨亮王四宝洪雷刘胜涛马永军中国重型机械研究院股份公司陕西西安710018 重庆大学重庆400044 国机重型装备集团股份有限公司四川德阳618000 洛阳轴研科技有限公司河南洛阳471003

成形磨齿通常是齿轮切削加工的最后一道工序,磨后齿面残余应力对齿轮的服役性能与寿命影响显著。传统基于X射线衍射方法的齿轮残余应力测量方法并未考虑齿面特殊几何特性,导致测量精度低。此外,磨齿工艺参数与磨前齿面状态对磨齿残余应... 详细信息

成形磨齿通常是齿轮切削加工的最后一道工序,磨后齿面残余应力对齿轮的服役性能与寿命影响显著。传统基于X射线衍射方法的齿轮残余应力测量方法并未考虑齿面特殊几何特性,导致测量精度低。此外,磨齿工艺参数与磨前齿面状态对磨齿残余应力的影响规律不清。因此,本文提出一种考虑齿轮特殊几何特性的齿面残余应力测量方法与辅助工装夹具,并建立基于磨齿工艺参数的齿面残余应力预测模型,最后探讨了磨前齿面残余应力对磨后残余应力的影响。本文为非平面残余应力的测量提出了新方法,所提的齿面残余应力预测方法能够指导实际生产。

关键词：成形磨齿残余应力预测模型服役性能

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Geochemical and isotopic characteristics of volcanic rocks from the northern East China Sea shelf margin and the Okinawa Trough

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Acta Oceanologica Sinica 2010年第4期29卷 48-61页

作者： ZENG Zhigang YU Shaoxiong WANG Xiaoyuan fu yongtao YIN Xuebo ZHANG Guoliang WANG Xiaomei CHEN Shuai Seafloor Hydrothermal Activity Laboratory of the Key Laboratory of Marine Geology and Environment Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China Graduate School of Chinese Academy of Sciences Beijing 100049 China

Volcanic rocks both from the northern East China Sea （NECS） shelf margin and the northern Okinawa Trough are subalkaline less aluminous,and lower in High Field Strength Elements （HFSE）.These rocks are higher in Large Ion Lithophile Elements （LILE）,thorium and uranium contents,positive lead anomalies,negative Nb-Ta anomalies,and enrichment in Light Rare Earth Elements （LREE）.Basalts from the NECS shelf margin are akin to Indian Ocean Mid-Ocean Ridge Basalt （MORB）,and rhyolites from the northern Okinawa Trough have the highest 207 Pb/ 204 Pb and 208 Pb/ 204 Pb *** NECS shelf margin basalts have lower 87 Sr/ 86 Sr ratios,ε N d and σ 18 O than the northern Okinawa Trough silicic *** to 40 K– 40 Ar isotopic ages of basalts from the NECS shelf margin,rifting of the Okinawa Trough may have been active since at least 3.65–3.86 *** origin of the NECS shelf margin basalt can be explained by the interaction of melt derived from Indian Ocean MORB-like mantle with enriched subcontinental *** basalts from both sides of the Okinawa Trough may have a similar origin during the initial rifting of the Okinawa Trough,and the formation of basaltic magmas closely relates to the thinning of continental *** source of the formation of the northern Okinawa Trough silicic rocks was different from that of the middle Okinawa Trough,which could have been generated by the interaction of basaltic melt with an enriched crustal *** the Ryukyu island arc to East China,the Cenozoic basalts have apparently increasing trends of MgO contents and ratios of LREE to Heavy Rare Earth Elements （HREE）,suggesting that the trace element variabilities of basalts may have been influenced by the subduction of the Philippine Sea plate,and that the effects of subduction of the Philippine Sea plate on the chemical composition of basaltic melts have had a decreasing effect from the Ryukyu island arc to East China.

关键词： volcanic rocks geochemical characteristics northern East China Sea shelf margin Okinawa Trough

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EFFECTIVE ELASTIC THICKNESS OF THE LITHOSPHERE - A REVIEW

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Scientia Geologica Sinica 2001年第3期 211-221页

作者： fu yongtao and Qin Yunshan Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071

This paper outlines the application of effective elastic thickness in continental and oceanic lithospheres. By means of this approach, a great deal of data about flexural rigidity and flexural characteristics of lithospheres are obtained in the oceanic ridge and its flanks, on hotspots or swells, on passive and active continental margins. With these data, geologists have more close insights into the flexural processes of the oceanic and continental lithosphere loaded by the volcanoes or seamounts and sediments, and sediments in terms of geodynamics. As a suggestion, we think that the approach of effective elastic thickness should be used for studying the continental margins of East Asia, as in the Okinawa Trough, the Taiwan orogenic belt and the South China Sea Basin.

关键词： EFFECTIVE ELASTIC THICKNESS OF THE LITHOSPHERE A REVIEW Te high

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青岛垭口—八仙墩变质海相碎屑岩的属性和构造意义

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地质科学 2010年第1期45卷 207-227页

作者：付永涛虞子冶中国科学院海洋研究所海洋地质与环境科学重点实验室青岛266071 中国科学院海洋研究所海洋油气研究中心青岛266071

青岛垭口一八仙墩变质海相碎屑岩分布面积大，保留了原生的各种沉积构造，为一套浊积岩系，应归属于扬子板块上奥陶统，建议命名为八仙墩组。浊积岩系中的砾岩含花岗质砾石、角闪岩砾石和长英质砾石，可以为复原上奥陶世扬子板块大陆边... 详细信息

青岛垭口一八仙墩变质海相碎屑岩分布面积大，保留了原生的各种沉积构造，为一套浊积岩系，应归属于扬子板块上奥陶统，建议命名为八仙墩组。浊积岩系中的砾岩含花岗质砾石、角闪岩砾石和长英质砾石，可以为复原上奥陶世扬子板块大陆边缘沉积环境和研究物源区大地构造背景提供良好的研究素材。岩石地球化学成份判别为硬砂岩和页岩，也佐证了本套地层为浊积岩系。弱的Ce／Ce^＊负异常，说明了海相沉积成因，也表明陆源碎屑物对沉积岩的主导作用。（Fe2O3＋MgO）-TiO2图解、La—Th—sc图解和｜rh—Sc—Zr／10图解表明本套碎屑岩具有活动大陆边缘背景和大陆岛弧的共同特征，但从比较高的La丰度、Ce丰度和YREE丰度，可以判断八仙墩碎屑岩为活动大陆边缘背景下发育的浊积岩系。通过露头的构造地质分析，推断本套地层是在扬子板块陆壳物质向华北板块下深俯冲过程期间或其后扬子板块陆壳上部盖层继续向华北板块仰冲就位的，在超高压变质岩折返时经历了由北向南的逆冲。本套碎屑岩明确指示在南黄海盆地深部应该有古生界奥陶统的地层，盆地深部的同一套地层应该具有油气储层和盖层的性能。

关键词：青岛八仙墩扬子板块上奥陶统浊积岩活动大陆边缘

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青岛八仙墩海相碎屑岩的岩石地球化学特征及其油气研究意义

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地质科学 2010年第4期45卷 1156-1169页

作者：吴拓宇赵淑娟付永涛中国地质大学(武汉)地球科学学院武汉430074 中国科学院海洋地质与环境科学重点实验室青岛266071 中国科学院海洋研究所海洋油气研究中心青岛266071

青岛八仙墩剖面出露了一套海相陆源碎屑沉积层序。这套碎屑岩受崂山花岗岩侵入已经发生变质,岩性以硬砂岩为主,夹有页岩、含锰细砂岩、长石砂岩,富含白云质。这套地层保留了各种原生的沉积构造,发育有浊积岩的底模构造,同沉积变形,水平... 详细信息

青岛八仙墩剖面出露了一套海相陆源碎屑沉积层序。这套碎屑岩受崂山花岗岩侵入已经发生变质,岩性以硬砂岩为主,夹有页岩、含锰细砂岩、长石砂岩,富含白云质。这套地层保留了各种原生的沉积构造,发育有浊积岩的底模构造,同沉积变形,水平层理、微粒序层理。岩石地球化学分析结果表明:碎屑岩的SiO_2含量在59.6%～71.6%之间,含量的多少与岩性无相关性;而黑色页岩的Al_2O_3含量变化于12.31%～16.39%之间,多在15%以上,高于灰白色砂岩的含量(普遍小于14.5%)。镜下特征和Al203含量都表明砂岩的成熟度低。除一个样品外,碎屑岩的∑REE含量高,在146.75×10^(-6)～245.78×10^(-6)之间,La在30.35×10^(-6)～61.39×10^(-6)之间,对球粒陨石标准化的(La/Yb)_N在8.68×10^(-6)～21.89×10^(-6)之间。对PASS标准化碎屑岩的(La/Ce)_N值为1.07～1.18,显示了陆源碎屑物质的主要贡献。该地层弱的Ce/Ce*负异常和富含白云质岩层指示了海相沉积环境。主量元素判别图解和微量元素判别图解表明这套碎屑岩具有活动大陆边缘背景和大陆岛弧的共同特征,但高的∑REE含量、La和Ce丰度支持了活动大陆边缘的沉积环境,但有待于采用更准确的重矿物分析来确定其物源区的大地构造性质。这套碎屑岩的出露指示了南黄海盆地深部应有奥陶统盆地相浊积沉积体系的存在,可能具有良好的浊积砂岩油气储层。

关键词：扬子板块南黄海盆地上奥陶统浊积岩海相硅质碎屑岩地层

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关于岩石圈有效弹性厚度的地质理解

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地质科学 2005年第4期40卷 585-593页

作者：付永涛范守志施小斌中国科学院海洋研究所山东青岛266071 中国科学院南海海洋研究所广州510301

简要回顾了岩石圈均衡理论的发展及岩石圈区域均衡和挠曲理论在岩石圈动力学研究中起的作用,阐述岩石圈有效弹性厚度(Te)的概念和特征。强调Te的研究是地质学和地球物理学的紧密结合,即通过岩石圈挠曲理论和区域均衡原理,对地形和重力... 详细信息

简要回顾了岩石圈均衡理论的发展及岩石圈区域均衡和挠曲理论在岩石圈动力学研究中起的作用,阐述岩石圈有效弹性厚度(Te)的概念和特征。强调Te的研究是地质学和地球物理学的紧密结合,即通过岩石圈挠曲理论和区域均衡原理,对地形和重力资料进行谱分析计算,来获取岩石圈的物理性质信息。计算的Te(和相应的挠曲刚度)是岩石圈等效的强度,与爆破地震、地震层析成像和大地电磁测深等方法观测到的岩石圈和地壳厚度不同,它们之间只有通过岩石圈的屈服刚度包络面(YSE)才能比较。大洋和大陆岩石圈YSE的理论计算,表明Te值显著小于地震学的地壳和岩石圈厚度。尤其对于大陆岩石圈,地壳厚度、热年龄和应变率均可显著影响岩石圈的强度。本文还以滇西为实例介绍了对相干值曲线计算的新认识和当前岩石圈Te研究的最新趋势。

关键词：岩石圈有效弹性厚度屈服刚度包络面区域均衡谱相干法

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基于模型的复杂系统安全性和可靠性分析技术发展综述

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航空学报 2020年第6期41卷 140-151页

作者：胡晓义王如平王鑫付永涛中国航空工业成都飞机设计研究所成都610041 中国航空综合技术研究所北京100028

复杂系统的安全性、可靠性分析一直是装备通用质量特性领域关注的热点问题。随着航空机载系统向综合化、集成化、智能化方向发展,系统的功能逻辑、架构设计以及容错设计越来越复杂,以人工演绎推理为主的传统安全性、可靠性分析手段已经... 详细信息

复杂系统的安全性、可靠性分析一直是装备通用质量特性领域关注的热点问题。随着航空机载系统向综合化、集成化、智能化方向发展,系统的功能逻辑、架构设计以及容错设计越来越复杂,以人工演绎推理为主的传统安全性、可靠性分析手段已经越来越不能满足要求,模型驱动的分析方法正在成为复杂系统安全性、可靠性设计所依赖的重要技术手段。特别是近几年,基于模型的系统工程技术发展迅猛,并在国内外航空企业中得到了广泛的应用和认可,这为基于模型的系统安全性、可靠性设计技术的进一步发展提供了有利条件。本文主要对国内外基于模型的复杂系统安全性、可靠性分析技术的研究进展进行了介绍,并对该项技术未来的发展方向和趋势进行了分析,为装备开展系统安全性、可靠性分析工作提供借鉴。

关键词：基于模型的系统工程(MBSE) 基于模型的安全性分析(MBSA) 基于模型的可靠性分析(MBRA) 同源设计模型驱动

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