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U-Pb zircon ages and petrogeochemistry and tectonic implications of gabbro and granite in southwest Lahad Datu area of Sabah, Malaysia

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Acta Oceanologica Sinica 2024年第2期43卷 94-110页

作者： Zhigang Zhao Wu Tang shixiang liu Huafeng Tang Pujun Wang Zhiwen Tian China National Offshore Oil Corporation(CNOOC)Research Institute Co. Ltd.Beijing 100028China College of Earth Sciences Jilin UniversityChangchun 130061China

The southwest Lahad Datu felsic rocks were previously thought to have formed in the late Triassic as part of the microcontinental crystalline *** on U-Pb ages,geochemistry,and the Hfisotopes of zircon from the southeastern Sabah gabbro and granite,in this study,the tectonic properties of the Sabah area during the Triassic were *** weighted average U-Pb zircon ages of the gabbro and granite samples were determined to be(230.9±2.5)Ma and(207.1±3.3)Ma,*** granite had SiO_(2) contents of 66.54%-79.47%,low TiO_(2) contents of 0.08%-0.3%,Al_(2)O_(3) contents of 10.97%-16.22%,Na_(2)O contents of 5.91 %-6.39%,and low K_(2)O contents of 0.15%-0.65%.The chondrite-normalized rare earth element(REE) patterns exhibit light REE enrichment,with right-sloping *** primitive mantle-normalized trace element spider diagrams exhibit Th,U,La,Sr,and Zr enrichment and Nb,Ta,P and Ti depletions,i.e.,the geochemical characteristics of typical island arc igneous *** tectonic discriminant diagram indicates that the granite is a volcanic arc *** Hf isotopic an alysis of gabbro zircon revealed that the zircons have ε_(Hf)(t)values of 12.08-16.24(mean of 14.32) and two-stage model ages(t_(DM2)) of 223-491 Ma(mean of 347 Ma).This indicates that the diagenetic magma of the gabbro was mainly derived from melting of newly formed crustal *** ophiolite in southeast Sabah has existed since the early Late *** crystalline basement granite in southeastern S abah was emplaced lasted from late Triassic to early *** on previous studies and global plate reconstruction models,it is speculated that the southeastern Sabah granite may have been formed in an island arc setting,i.e.,where the oceanic crust of the Paleo-Tethys Ocean collided with the oceanic crust of the Panthalassa Ocean.

关键词： Sabah early late Triassic ophiolite granite tectonic properties

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Differences in the Tectonic Evolution of Basins in the CentralSouthern South China Sea and their Hydrocarbon Accumulation Conditions

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Acta Geologica Sinica(English Edition) 2021年第1期95卷 30-40页

作者： TANG Wu ZHAO Zhigang SONG Shuang WANG Yibo XIE Xiaojun liu shixiang CNOOC Research Institute Co. Ltd.Beijing 100028China

To reveal the causes of differences in the hydrocarbon accumulation in continental marginal basins in the centralsouthern South China Sea,we used gravity-magnetic,seismic,drilling,and outcrop data to investigate the tectonic histories of the basins and explore how these tectonic events controlled the hydrocarbon accumulation conditions in these *** the subduction of the Cenozoic proto-South China Sea and the expansion of the new South China Sea,the continental margin basins in the central-southern South China Sea could be classified as one of three types of epicontinental basins:southern extensional-foreland basins,western extensional-strike slip basins,and central extensional-drift *** these basins have different tectonic and sedimentary histories,they also differ in their accumulated hydrocarbon *** the Cenozoic,the basin groups in the southern South China Sea generally progressed through three stages:faulting and subsidence from the late Eocene to the early Miocene,inversion and uplift in the middle Miocene,and subsidence since the late *** source rocks with marine-continental transitional facies dominated byⅡ-Ⅲkerogen largely developed in extremely thick Miocene sedimentary series with the filling characteristics being mainly deep-water deposits in the early stage and shallow water deposits in the late *** well-developed sandstone and carbonate reservoirs,this stratum has a strong hydrocarbon generation *** the Cenozoic,the basin groups in the western South China Sea also progressed through the three developmental stages discussed *** source rocks with lacustrine facies,marine-continental transitional facies,and terrigenous marine facies dominated byⅡ2-Ⅲkerogen largely developed in the relatively thick stratum with the filling characteristics being mainly lacustrine deposits in the early stage and marine deposits in the late *** a reservoir comprised of self-generated a

关键词： tectonic evolution hydrocarbon accumulation continental margin central-southern South China Sea proto-South China Sea

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Acyl-chloride functionalized graphene oxide chemically grafted with hindered phenol and its application in anti-degradation of polypropylene

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Progress in Natural Science:Materials International 2020年第3期30卷 328-336页

作者： Jialu Yao shixiang liu Yajiang Huang Shijie Ren Yadong Lv Miqiu Kong Guangxian Li College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering of China Sichuan University

In this study,graphene oxide (GO) nanosheets were first functionalized by the acyl-chloride reaction and then reacted with hindered phenol (HP) to obtain HP grafted GO (GO-g-HP).The GO-g-HP prepared under the optimized condition exhibited a high efficiency against both thermal and photo oxidation of isotactic polypropylene (iPP).GO-g-HP exhibited a much better anti-aging efficiency than that of HP and GO used individually or that of their physical *** outstanding anti-aging effect of GO-g-HP was attributed to the excellent synergistic effect produced between the chemically bonded GO and HP,which resulted in an improved oxygen barrier property of GO and excellent utilization of the free radical scavenging capability of GO and ***,thanks to the grafting of HP on GO,the physical loss of HP,which was one of the main shortcomings for traditional small molecular antioxidants,was largely *** is expected that the GO-g-HP prepared can well meet the requirement of long-term applications of polymers in some harsh service conditions.

关键词： Graphene oxide Hindered phenols Polypropylene Thermal oxidation Photo oxidation

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Hydrocarbon accumulation in the deep waters of South China Sea controlled by the tectonic cycles of marginal sea basins

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Petroleum Research 2016年第1期1卷 39-52页

作者： Gongcheng Zhang Hongjun Qu shixiang liu Xiaojun Xie Zhao Zhao Huailei Shen CNOOC Research Institute Beijing 100028China Department of Geology Northwest UniversityXi’an 710069China

The tectonic cycle of the marginal sea basins in South China Sea(SCS)includes two cycles,i.e.,the formation and contraction of Palaeo-SCS and *** northern part of SCS is a rift basin on a passive continental margin,while the the Nansha Block is a drifting rift *** southern part is a compound compressional basin on an active continental margin;the western part is a shear-extensional basin on a transform continental margin;the eastern part is an accretionary wedge basin on a subduction continental *** deep-water basins are mainly distributed on the continental slope and the the Nansha *** are three sets of source rocks in the deep-water areas of the northern continental margin in SCS,i.e.,Eocene terrestrial facies,early Oligocene transitional facies and late Oligocene marine facies.A set of Late Cretaceous-Early Oligocene terrestrial marine facies source rocks are developed in the drift-rift basin of *** sets of Oligocene,early Miocene and Mid-Miocene marine-terrestrial transitional facies source rocks are developed in the deep-water areas of both the southern and western continental margins of *** sets of reservoirs developed in the northern deep waters of SCS are dominated by deep sea *** sets of reservoirs developed in the the Nansha Block are dominated by delta and biogenic *** southern part of SCS is dominated by deep sea fan and biogenic *** of large channels and other clastic facies were developed in front of the estuaries,while biogenic reef bank was formed in the uplift *** hydrocarbon accumulation assemblages are mainly presented as Oligocene-Pliocene in the deep waters on the northern continental margin of SCS,Eocene-Lower Oligocene in the the Nansha Block,Oligocene-Pliocene and Oligocene-Miocene in the deep waters on the southern and western continental margin of SCS,*** major hydrocarbon reservoir types in the deep waters of SCS are related to structural traps,deep water fans

关键词： tectonic cycles,marginal sea basins deep water area reservoir assemblages South China Sea

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The gradual subduction-collision evolution model of Proto-South China Sea and its control on oil and gas

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Acta Oceanologica Sinica 2023年第3期42卷 123-137页

作者： Xiaojun Xie Wu Tang Gongcheng Zhang Zhigang Zhao Shuang Song shixiang liu Yibo Wang Jia Guo China National Offshore Oil Corporation(CNOOC)Research Institute Co. Ltd.Beijing 100028China

This study involved outcrop,drilling,seismic,gravity,and magnetic data to systematically document the geological records of the subduction process of Proto-South China Sea(PSCS)and establish its evolution *** results indicate that a series of arc-shaped ophiolite belts and calcalkaline magmatic rocks are developed in northern Borneo,both of which have the characteristics of gradually changing younger from west to east,and are direct signs of subduction and collision of *** the same time,the subduction of PSCS led to the formation of three accretion zones from the south to the north in Borneo,the Kuching belt,Sibu belt,and Miri *** sedimentary formation of northern Borneo is characterized by a three-layer structure,with the oceanic basement at the bottom,overlying the deep-sea flysch deposits of the Rajang–Crocker group,and the molasse sedimentary sequence that is dominated by river-delta and shallow marine facies at the top,recording the whole subduction–collision–orogeny process of ***,seismic reflection and tomography also confirmed the subduction and collision of *** on the geological records of the subduction and collision of PSCS,combined with the comprehensive analysis of segmented expansion and key tectonic events in the South China Sea,we establish the“gradual”subduction-collision evolution model of *** the late Eocene to middle Miocene,the Zengmu,Nansha,and Liyue–Palawan blocks were separated by West Baram Line and Balabac Fault,which collided with the Borneo block and Kagayan Ridge successively from the west to the east,forming several foreland basin systems,and PSCS subducted and closed from the west to the *** subduction and extinction of PSCS controlled the oil and gas distribution pattern of southern South China Sea(SSCS)mainly in three ***,the“gradual”closure process of PSCS led to the continuous development of many large deltas in ***,the deltas formed during the subduction–collision of PS

关键词： Proto-South China Sea gradual subduction-collision evolution model oil and gas distribution southern South China Sea Borneo

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The geological characteristics of the large-and medium-sized gas fields in the South China Sea

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Acta Oceanologica Sinica 2021年第2期40卷 1-12页

作者： Gongcheng Zhang Dongdong Wang Lei Lan shixiang liu Long Su Long Wang Wu Tang Jia Guo Rui Sun College of Earth Science and Engineering Shandong University of Science and TechnologyQingdao 266590China CNOOC Research Institute Co. Ltd.Beijing 100028China Northwest Institute of Eco-Environment and Resources Chinese Academy of SciencesLanzhou 730000China Key Laboratory of Petroleum Resources Gansu ProvinceLanzhou 730000China

By the end of 2019,more than 220 gas fields had been discovered in the South China *** order to accurately determine the geological characteristics of the large-and medium-sized gas fields in the South China Sea,this study conducted a comprehensive examination of the gas *** on the abundant available geologic and geochemical data,the distribution and key controlling factors of the hydrocarbon accumulation in the South China Sea were *** geological and geochemical features of the gas fields were as follows:(1)the gas fields were distributed similar to beads in the shape of a"C"along the northern,western,and southern continental margins;(2)the natural gas in the region was determined to be composed of higher amounts of alkane gas and less CO2;(3)the majority of the alkane gas was observed to be coal-type gas;(4)the gas reservoir types included structural reservoirs,lithologic reservoirs,and stratigraphic reservoirs,respectively;(5)the reservoir ages were mainly Oligocene,Miocene,and Pliocene,while the lithology was mainly organic reef,with some sandstone deposits;and(6)the main hydrocarbon accumulation period for the region was determined to be the late Pliocene-Quaternary *** addition,the main controlling factors of the gas reservoirs were confirmed to have been the development of coal measures,sufficient thermal evolution,and favorable migration and accumulation conditions.

关键词： coal-type gas coal measures thermal evolution hydrocarbon traps organic reefs South China Sea

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RAPID THERMAL ANNEALING OF As ION IMPLANTED SILICON

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中国科学院研究生院学报 1989年第1期6卷 61-63页

作者： liu shixiang liu Xuejun Shi Wanquan (Graduate School,USTC,Academia Sinica)

As ion implanted damage of silicon was removed by Rapid ThermalAnnealing(RTA)using Model KST-1 RTA *** ofdamage and dopant redistribution were investigated by RutherfordBackscattering Spectra(RBS)and Extended *** resi... 详细信息

关键词： implanted RAPID annealing dopant removed redistribution heating wafer Rutherford negligible

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The Influence of Parent-Child Relationship on Pupils’ Learning Motivation: The Mediating Role of Teacher-Student Relationship

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Journal of Psychological Research 2022年第3期4卷 6-13页

作者： Yuzhu Ren shixiang liu Teachers College of Beijing Union University Beijing100011China

Objective:The study is to analyze the influence of parent-child relationship on pupils’learning motivation,and to explore the mediating mechanism of teacher-student relationship in parent-child relationship and learning ***:This study conducted a questionnaire survey on 213 pupils in Grades 5 and 6 in two schools in Beijing using Pianta’s teacher-student relationship scale revised by Qu,Dornbush’s parent-child intimacy scale revised by Zhang and the learning motivation scale adapted by ***:Gender,grade,whether they are the only child and to be a class cadre or not show significant differences in some dimensions of parent-child relationship,teacher-student relationship and learning *** total scores of parent-child relationship,teacher-student relationship and learning motivation are positively correlated,and some sub dimensions are also significantly ***-child relationship and teacher-student relationship have a significant positive predictive effect on learning motivation,and parent-child relationship has a significant positive predictive effect on teacher-student ***-student relationship plays a mediating role in the influence of parent-child relationship on learning ***:Parent-child relationship can promote the relationship between teachers and students,and then enhance pupils’learning motivation.

关键词： Parent-Child relationship Teacher-Student relationship Learning motivation Pupil

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HIGH ENERGY NITROGEN ION IMPLANTED SOI TECHNOLOGY

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中国科学院研究生院学报 1989年第2期6卷 44-47页

作者： Shi Wanquan, liu shixiang, liu Xuejun and Wu Yong (Graduate School, Academia Sinica)

Buried Si3N4 layer is formed by hitrogen ion implanted silicoh with high energy （400Key） and high dose (1×1018/cm2). The unimplanted single crystal zone is used as seed crystal. Seed inducing recrystallization is c... 详细信息

关键词： implanted annealing insulator inducing wafer Insulator Rutherford buried Electron melting

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Light Induced Rapid Thermal Diffusion of Boron Atom in Silicon

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Chinese Physics Letters 1992年第9期9卷 475-478页

作者： SHI Wanquan HOU Qingrun liu Xuejun liu shixiang FU Zhengqing LU Liwu LI Yuanjing Department of Physics Graduate SchoolAcademia SinicaBeijing 100039 Institute of semiconductors Academia SinicaBeijing 100083

We have studied the light induced rapid thermal diffusion of boron atom in *** samples were heated by the rapid thermal *** have carried out spreading resistance and deep level transient spectroscopy(DLTS)*** impurity distribution profile is much shallower and steeper than that of conventional thermal diffusion and the diffusion depth can be con-trolled to 0.1μ*** peaks in the deep level transient spectra were detected and the density of these defects ranges from 0.5 × 10^(12) to 5.6 × 10^(12)/cm^(3).The passivation and annihilation of these defects have been *** have also made the planar diode whose diameter is 500μ*** reverse current and the back breakdown voltage of the planar diode are 10^(-9) A and 80V respectively.

关键词： breakdown DLTS diffusion

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