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Origin and Evolution of Ultramafic Rocks along the Sagaing Fault, Myanmar

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Journal of Earth Science 2023年第1期34卷 122-132页

作者： Tomoaki Morishita Hnin Min Soe Hla Htay Than Htut Lwin Juan Miguel Guotana Akihiro Tamura Tomoyuki Mizukami khin zaw 无 Faculty of Geosciences and Civil Engineering Kanazawa UniversityKanazawa920-1192Japan Lamont-Doherty Earth Observatory Columbia UniversityPalisadesNY10964USA Volcanoes and Earth’s Interior Research Center Japan Agency for Marine-Earth Science and Technology2-15 NatsushimaKanagawa237-0061Japan Geology Department University of MandalayMandalay05092Myanmar Geology Department Dagon UniversityNorth Dagon11422Myanmar Taunggoke Degree College TaunggokeTaunggoke Township07161Myanmar Graduate School of Natural Science and Technology Kanazawa UniversityKanazawaIshikawa920-1192Japan CODES ARC Centre of Excellence in Ore Deposits University of TasmaniaTasmania7001Australia

The active Sagaing fault in Myanmar defines the boundary between the Indian Plate and the Eurasian Plate and causes seismic damage in the major cities of Myanmar. Small bodies of serpentinite occur along the fault. We for the first time investigated the highly sheared serpentinite bodies in the Sheinmagar area and Yega Inn area along the Sagaing fault. Extensively sheared/brecciated serpentinites and related rocks, such as talc and/or chlorite-bearing rocks contains small rock fragments of serpentinites. Serpentine texture and mineral chemistry indicate that the protolith of these serpentinites were mainly harzburgite with minor amounts of dunite, some of which are cut by gabbroic veins. No shape-preferred orientation of the antigorite is present, indicating that the serpentinization was occurred under relatively static conditions. Protolith and serpentine minerals are similar to those of the jadeitite-bearing serpentinites in the north of the Sagaing fault(the Jade Mine belt). Chemical variations of spinels in the studied area are within the compositional range of forearc peridotites and those in the mantle section of nearby ophiolites. After the formation of antigorite serpentinite under static conditions, these serpentinites were subsequently, but locally deformed, probably due to the activity of the Sagaing fault, resulting in the formation of serpentinite schist/brecciated rock. The presence of the less-deformed antigorite serpentinite in the sheared/brecciated zone indicates the strain localization mainly along the surrounding serpentine-talc(±chlorite) schistose rocks, which is probably formed by the reaction between serpentinite and country rocks. Further studies are needed to better understand whether the distribution of serpentinized peridotites cause variations in the activity of the Sagaing fault.

关键词： Sagaing fault serpentinite deformation ophiolite

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印度洋变局中的大国竞争与合作

印度洋经济体研究 2024年第1期 141-159,164页

作者： [斯]苏密斯·纳坎德拉 [巴]哈立德·拉赫曼 [缅]吴钦貌佐朱艺翔(译) 斯里兰卡探路者基金会巴基斯坦政策研究中心缅甸战略与国际问题研究院澳大利亚悉尼大学人文与社会科学院

印度洋海上贸易和海上交通要道对于世界各国的重要性再强调也不为过。其中,中国90%和印度80%的石油进口需要通过该地区的阿拉伯海。更为重要的是,印度洋海床承载着的光纤电缆网络是当代数字连接和通信系统在东西方之间联通的基石,不仅... 详细信息

印度洋海上贸易和海上交通要道对于世界各国的重要性再强调也不为过。其中,中国90%和印度80%的石油进口需要通过该地区的阿拉伯海。更为重要的是,印度洋海床承载着的光纤电缆网络是当代数字连接和通信系统在东西方之间联通的基石,不仅具有战略重要性,而且已经引起了区域大国的关注,并正在加剧着该地区地缘政治紧张局势,凸显全球治理模式转变的迫切性和必要性。同时,印度洋地区位于“全球南方”的中心,这里拥有许多地区性组织,如东盟、非洲联盟、海合会和环孟加拉湾多领域技术经济合作倡议(BIMSTEC)等。然而,如何防止竞争演变为全面冲突和战争,则是一个真正的挑战。和平共处原则和致力于共同发展的理念再次成为构建多边主义的要义。

关键词：印度洋战略竞争全球治理全球南方

澳大利亚造山型金矿和侵入岩有关金矿系统流体包裹体资料和矿化过程的比较

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岩石学报 2007年第1期23卷 21-32页

作者： Terry P.Memagh E.N.Bastrakov khin zaw A.S.Wygmlak L.A.I.Wybom Geoscience Australia GPO Box 378CanberraACT2601Australia. CODES ARC Centre of Excellence in Ore Deposits University of TasmaniaPrivate Bag 79HobartTAS7001Australia. Northern Territory Geological Survey GPO Box 3000DarwinNT0801Australia.

We have examined the fluid inclusion data and fluid chemistry of Australian orogenic and intrusion-related gold deposits to determine if similar mineralization processes apply to both styles of *** fluid inclusion data from the Yilgarn craton,the western subprovince of the Lachlan orogen,the Tanami,Tennant Creek and Pine Creek regions,and the Telfer gold mine show that mineralization involved fluids with broadly similar major chemical components(i.e.H_2O+NaCl+CO_2±CH_4±N_2).These deposits formed over a wide range of temperature-pressure conditions(500℃,30/*** amphibole breakdown occurs in a granite source region,the spatially related deposits are more commonly associated with Cu-Au deposits rather than Au-only deposits that are associated with lower temperature *** dominant processes thought to cause gold precipitation in both types of deposits are fluid-rock interaction(***)or phase *** of the physical and chemical properties of the H_2O-NaCl-CO_2 system on the nature of gold precipitation mechanisms at different crustal levels infers different roles of chemical(fluid-rock interaction)versus rheological(phas

关键词：澳大利亚造山型金矿侵入岩有关金矿系统流体包裹体资料矿化过程

东天山觉罗塔格红云滩花岗岩年代学、地球化学及其构造意义

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岩石学报 2006年第5期22卷 1121-1134页

作者：吴昌志张遵忠 khin zaw Fernando Della-Pasque 唐俊华郑远川汪传胜三金柱内生金属矿床成矿机制研究国家重点实验室(南京大学)南京大学地球科学系内生金属矿床成矿机制研究国家重点实验室(南京大学) 新疆有色地质勘查局704地质队哈密839000

东天山觉罗塔格地区广泛发育的晚古生代岩浆岩及相关的矿产一直是东天山大地构造研究的焦点。觉罗塔格南缘红云滩花岗质岩体的岩石、矿物组合显示典型的钙碱性火山弧花岗岩特征。岩石地球化学研究表明,该花岗质岩石富集大离子亲石元素... 详细信息

东天山觉罗塔格地区广泛发育的晚古生代岩浆岩及相关的矿产一直是东天山大地构造研究的焦点。觉罗塔格南缘红云滩花岗质岩体的岩石、矿物组合显示典型的钙碱性火山弧花岗岩特征。岩石地球化学研究表明,该花岗质岩石富集大离子亲石元素而亏损高场强元素,是洋壳俯冲所导致的下地壳物质部分熔融、岩浆分离结晶和上地壳同化混染作用的产物。LAM-ICP/MS锆石定年结果表明,红云滩花岗岩侵位于早-中石炭世(328．5±9．3Ma)。结合觉罗塔格地区由南至北,晚古生代矿产分布由火山沉积-热液改造型铁矿向斑岩型铜钼矿过渡的特征、火山-沉积岩分布和该区晚古生代的大地构造演化历史,作者推测:早古生代觉罗塔格洋向塔里木板块俯冲并形成中天山岛弧之后,该洋盆并未完全消亡,并于晚古生代时极性反转,向北俯冲于准-吐-哈地块之下。红云滩花岗岩正是形成于晚古生代觉罗塔格俯冲洋壳之上的火山弧环境。觉罗塔格地区晚古生代的岩浆岩,火山-沉积岩和矿产分布均不同程度受控于这一大地构造背景。

关键词：花岗岩年代学觉罗塔格东天山新疆

缅甸南部土瓦镇地区奔奈冲和耶坎津东脉型W-Sn矿床的地质学和地温测量

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地球与环境 1985年第9期 7-10页

作者： U khin zaw 谭礼国

引言 W-Sn矿床在缅甸南部丹那沙林区土瓦镇地区广泛分布。W-Sn矿化通常与侵入呈NNW-SSE走向的石炭系丹老群变碎屑岩的花岗岩类侵入体关系密切。据报道,土瓦镇地区有30多处W-Sn产地,其矿床类型有原生脉型矿床

关键词：矿床矿藏均一温度流体包体脉石英石英脉矿脉矿体土瓦地质学地球科学缅甸

缅甸Kayan州Mawchi矿山锡—钨成矿作用的流体包裹体研究

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地质科技通报 1984年第4期 112-116页

作者： U khin zaw ,Daw khin Myo Thet ,冯志文

Mawchi矿山位于缅甸Kayah州,北纬18°49′,东经97°10′,一般标高1.1Km(图1).在第二次世界大战前,Mawchi是世界上最大的锡和钨的产地之一.从1939到1940年,它生产了缅甸钨的总产量的60%,当时,缅甸的钨的总产量占世界钨的产量的17.4%.地... 详细信息

Mawchi矿山位于缅甸Kayah州,北纬18°49′,东经97°10′,一般标高1.1Km(图1).在第二次世界大战前,Mawchi是世界上最大的锡和钨的产地之一.从1939到1940年,它生产了缅甸钨的总产量的60%,当时,缅甸的钨的总产量占世界钨的产量的17.4%.地质背景Mawchi矿区地质图见图2.这个地区以由砂岩、砂砾岩、钙质泥岩、页岩和灰岩组成的沉积岩系为特征;在矿区范围内被称为Mawchi系,它可以与Tennanserim的Tavoy地区内的Mergni系对比.一个小的花岗岩类侵入体侵位于Mawchi矿区的沉积岩中,并产生了一个低品位的热变质晕,由大理岩、石英岩、斑点砂砾岩和硬化板岩组成.Mawchi花岗岩类侵入体是Sn-W有关的.缅甸花岗岩带中最小的岩体之一.根据目前所获取的地层证据和K—Ar年代测定法(Garson等.1976:Mitehell,1977),这个带侵位的时代被认为是晚中

关键词：流体包裹体萤石白钨矿矿物包体非金属矿物钙钨矿钨矿物 Kayan Mawchi 地质作用成矿作用缅甸矿山

Multi-environment BSA-seq using large F3 populations is able to achieve reliable QTL mapping with high power and resolution: An experimental demonstration in rice

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The Crop Journal 2024年第2期12卷 549-557页

作者： Yan Zheng Ei Ei khine khin Mar Thi Ei Ei Nyein Likun Huang Lihui Lin Xiaofang Xie Min Htay Wai Lin khin Than Oo Myat Myat Moe San San Aye Weiren Wu College of Life Sciences Fujian Agriculture and Forestry UniversityFuzhou 350002FujianChina Fujian Provincial Key Laboratory of Crop Breeding by Design Fujian Agriculture and Forestry UniversityFuzhou 350002FujianChina Key Laboratory of Genetics Breeding and Multiple Utilization of CropsMinistry of EducationFujian Agriculture and Forestry UniversityFuzhou 350002FujianChina Department of Botany Mawlamyine UniversityMon StateMawlamyineMyanmar Department of Botany Dagon UniversityNorth DagonYangonMyanmar

Bulked-segregant analysis by deep sequencing(BSA-seq) is a widely used method for mapping QTL(quantitative trait loci) due to its simplicity, speed, cost-effectiveness, and efficiency. However, the ability of BSA-seq to detect QTL is often limited by inappropriate experimental designs, as evidenced by numerous practical studies. Most BSA-seq studies have utilized small to medium-sized populations, with F2populations being the most common choice. Nevertheless, theoretical studies have shown that using a large population with an appropriate pool size can significantly enhance the power and resolution of QTL detection in BSA-seq, with F_(3)populations offering notable advantages over F2populations. To provide an experimental demonstration, we tested the power of BSA-seq to identify QTL controlling days from sowing to heading(DTH) in a 7200-plant rice F_(3)population in two environments, with a pool size of approximately 500. Each experiment identified 34 QTL, an order of magnitude greater than reported in most BSA-seq experiments, of which 23 were detected in both experiments, with 17 of these located near41 previously reported QTL and eight cloned genes known to control DTH in rice. These results indicate that QTL mapping by BSA-seq in large F_(3)populations and multi-environment experiments can achieve high power, resolution, and reliability.

关键词： BSA-seq QTL mapping Large F3 population Multi-environment experiment Cross-validation

Multiscale and Auto-Tuned Semi-Supervised Deep Subspace Clustering and Its Application in Brain Tumor Clustering

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Computers, Materials & Continua 2024年第6期79卷 4741-4762页

作者： Zhenyu Qian Yizhang Jiang Zhou Hong Lijun Huang Fengda Li khin Wee Lai Kaijian Xia School of Artificial Intelligence and Computer Science Jiangnan UniversityWuxi214122China Department of Medical Imaging The Changshu Affiliated Hospital of Soochow UniversitySuzhou215500China Department of Neurosurgery The Changshu Affiliated Hospital of Soochow UniversityChangshu215500China Department of Scientific Research The Changshu Affiliated Hospital of Soochow UniversitySuzhou215500China Changshu Key Laboratory of Medical Artificial Intelligence and Big Data Suzhou215500China Department of Biomedical Engineering Faculty of EngineeringUniversity of MalayaKuala Lumpur50603Malaysia

In this paper,we introduce a novel Multi-scale and Auto-tuned Semi-supervised Deep Subspace Clustering(MAS-DSC)algorithm,aimed at addressing the challenges of deep subspace clustering in high-dimensional real-world data,particularly in the field of medical *** deep subspace clustering algorithms,which are mostly unsupervised,are limited in their ability to effectively utilize the inherent prior knowledge in medical *** MAS-DSC algorithm incorporates a semi-supervised learning framework that uses a small amount of labeled data to guide the clustering process,thereby enhancing the discriminative power of the feature ***,the multi-scale feature extraction mechanism is designed to adapt to the complexity of medical imaging data,resulting in more accurate clustering *** address the difficulty of hyperparameter selection in deep subspace clustering,this paper employs a Bayesian optimization algorithm for adaptive tuning of hyperparameters related to subspace clustering,prior knowledge constraints,and model loss *** experiments on standard clustering datasets,including ORL,Coil20,and Coil100,validate the effectiveness of the MAS-DSC *** results show that with its multi-scale network structure and Bayesian hyperparameter optimization,MAS-DSC achieves excellent clustering results on these ***,tests on a brain tumor dataset demonstrate the robustness of the algorithm and its ability to leverage prior knowledge for efficient feature extraction and enhanced clustering performance within a semi-supervised learning framework.

关键词： Deep subspace clustering multiscale network structure automatic hyperparameter tuning semi-supervised medical image clustering

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微藻对养殖废水中污染物的净化效果综述

农业资源与环境学报 2024年第4期41卷 901-917页

作者：曹宇昂王涵 PHYU khin khin 梁军锋徐晓钰张克强支苏丽东北农业大学资源与环境学院哈尔滨150036 农业农村部环境保护科研监测所天津300191 农业农村部环境保护科研监测所大理综合实验站云南大理671004

养殖废水具有常规污染物浓度高,含有重金属、抗生素、激素等多种有毒有害污染物的特点,在养殖废水污染物净化方面,微藻转化技术展现出了巨大潜力。为探究微藻处理养殖废水的效果、机制机理、影响因素等,本文采用文献调研的方法,总结了... 详细信息

养殖废水具有常规污染物浓度高,含有重金属、抗生素、激素等多种有毒有害污染物的特点,在养殖废水污染物净化方面,微藻转化技术展现出了巨大潜力。为探究微藻处理养殖废水的效果、机制机理、影响因素等,本文采用文献调研的方法,总结了微藻对养殖废水中主要污染物的去除效果及去除机制,分析了微藻处理养殖废水效果的不同影响因素,并重点讨论了不同处理工艺中微藻的作用机理及其对污染物的去除效率。结果表明:微藻可以通过光合作用和同化作用去除养殖废水中碳、氮、磷等常规污染物,并可以通过系列生物学过程去除重金属、抗生素、悬浮物、激素、致病菌等,同时,微藻对污染物的去除效果受藻种类型、接种浓度、温度、光照、废水性质的影响,多藻协同、固定化处理均可提升微藻的去除能力,而藻菌共生技术能使微藻和细菌互利共生,达到更高效去除污染物的目的。综上,微藻在养殖废水处理中潜力较大,在实际处理过程中应考虑其最佳环境条件及适宜的处理工艺,以构建高效微藻养殖废水净化系统。

关键词：养殖废水微藻去除效果影响因素固定化藻菌共生