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Gold Mineralization in the Kyaikhto District, Mon State, Southern Myanmar

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Open Journal of Geology 2019年第1期9卷 29-42页

作者： Myo Kyaw Hlaing aung zaw myint Thomas Tindell May Thwe Aye Department of Earth Resources Engineering Kyushu University Fukuoka Japan Department of Geology University of Yangon Yangon Myanmar

The Kyaikhto gold district is located within the Slate Belt and Mogok Metamorphic Belt of Southern Myanmar. The study area is covered by Carboniferous to Lower Permian metasedimentary rocks consisting of slate, phyllite, and schist of the Mergui Group, intruded by later igneous rocks. Four gold occurrences have been identified in the Kyaikhto district: the Kunzeik in the north, Zibyaung, and Thae Phyu Chaung in the center and Meyon in the south. Gold mineralization in the Kyaikhto district is associated with sheeted, stockwork, dissemination, and sulfide-bearing quartz veins. Ore minerals recognized include sphalerite, galena, chalcopyrite, molybdenite and pyrite with minor native gold and electrum. Two types of fluid inclusions were examined in the quartz samples of the Kunzeik and Zibyaung—Type A: aqueous carbonic fluid inclusions and Type B: aqueous fluid inclusions. At the Kunzeik, Type A fluid inclusions homogenize at temperatures from 296°C to 376°C with low salinities (1.6 - 4.6 wt% NaCl equivalent). The homogenization temperatures of Type B fluid inclusions in vein quartz range from 246°C to 312°C, with salinities of between 1.2 and 10.7 wt% NaCl equivalent. In the Zibyaung, the homogenization temperatures of Type A inclusions vary from 305°C to 378°C, with salinities from 4.6 to 9.6 wt% NaCl equivalent. The homogenization temperatures of Type B fluid inclusions mainly range from 242°C to 298°C, with salinities from 0.9 to 11.8 wt% NaCl equivalent. These characteristics of fluid inclusions are similar to those of orogenic gold mineralization systems.

关键词： Mineralization Fluid Inclusion Kyaikhto District Southern Myanmar

Multiple Uplift and Exhumation of the Southeastern Tibetan Plateau:Evidence from Low-Temperature Thermochronology

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Acta Geologica Sinica(English Edition) 2024年第3期98卷 569-584页

作者： WU Limin PENG Touping FAN Weiming ZHAO Guochun GAO Jianfeng DONG Xiaohan PENG Shili MIN Kang Tin aung myint State Key Laboratory of Isotope Geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China Chinese Academy of Sciences Center for Excellence in Deep Earth Science Guangzhou 510640China University of Chinese Academy of Sciences Beijing 100049China Chinese Academy of Sciences Center for Excellence in Tibetan Plateau Earth Sciences Beijing 100101China Department of Earth Sciences The University of Hong KongHong Kong 999077China State Key Laboratory of Ore Deposit Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) ZhuhaiGuangdong 519085China Department of Geology University of MandalayMandalay 05011Myanmar

Since the Cenozoic,the Tibetan Plateau has experienced large-scale uplift and outgrowth due to the India-Asia ***,the mechanism and timing of these tectonic processes still remain ***,using apatite fission track dating and inverse thermal modeling,we explore the mechanism of different phases of rapid cooling for different batholiths and intrusions in the southeastern Tibetan *** contrast to previous views,we find that the coeval granitic batholith exposed in the same tectonic zone experienced differential fast uplift in different sites,indicating that the present Tibetan Plateau was the result of differential uplift rather than the entire lithosphere uplift related to lithospheric collapse during Cenozoic *** addition,we also suggest that the 5-2 Ma mantle-related magmatism should be regarded as the critical trigger for the widely coeval cooling event in the southeastern Tibetan Plateau,because it led to the increase in atmospheric CO_(2)level and a hotter upper crust than before,which are efficient for suddenly fast rock weathering and ***,we propose that the current landform of the southeastern Tibetan Plateau was the combined influences of tectonic and climate.

关键词： apatite fission track rapid cooling differential uplift magmatism southeastern Tibetan Plateau

Study on the Establishment of Demonstration Site for Peatland Conservation through Integrated Management and Sustainable Utilization of Non-timber Forest Products(NTFPs)

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Journal of Agricultural Science and Technology(A) 2024年第2期14卷 93-106页

作者： Sann Lwin Mya Win myint myint Khaing Tin Maung Htun Soe Min Ye Wunna Soe Forest Resource Environment Development and Conservation Association(FREDA)

A participatory action research was conducted in 2022,with the“Establishment of Demonstration Site for Peatland Conservation through Integrated Management and Sustainable Utilization of Non-Timber Forest Products(NTFPs)”to give recommendation on the development of guidelines on Sustainable Utilization of Non-Timber Forest Products(NTFPs)and peatland *** to the peat soil assessment,it was found that peat soil content was very low and top soil was thin under the mangrove forest,and Payena paralleloneura-Kan zaw bearing forest in March *** material might be pressed by trespasser to collect Kan zaw seed,to conduct horticulture and mining near the Kan zaw bearing forest,or organic material might be damaged by burning with controlled fire in the previous years,under Kan zaw trees to collect *** material might have been carried to the downwards with running water due to the heavy rainfall,with 4,700 mm/*** forest and Kan zaw bearing evergreen forest can be assumed as“the major source of coastal peatland formation,with peat deposits eroded seawards”.It is assumed that the organic material will accumulate on top of the sands and it will lead to the formation of the peatland at coastal *** can be assumed that the accumulation of organic material found in mangrove forest and evergreen forests will promote the soil carbon storage,if we can adopt the ASEAN Policy on Zero Burning,which reflect ASEAN's commitment to controlling fires and haze,offering techniques,benefits,requirements,and challenges for implementing zero burning practices[1].Sustainable utilization of NTFP including peat and Kan zaw-Payena paralleloneura Kurz seed was studied at demonstration sites,and it is recommended to make a trial on silvicultural system at mangrove forest and apply suitable silvicultural system such as Clear-Felling(in blocks or in alternate strips)system,Selection System,and Shelter Wood System to ensure the sustainable utilization of NTFP

关键词： Silvicultural system mangrove forest moist evergreen forest peat soil Kan zaw-Payena paralleloneura Kurz seed

Effects of Integrated Organic and Inorganic Fertilizers on Yield and Growth Parameters of Rice Varieties

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Rice science 2019年第5期26卷 309-318页

作者： Kyi MOE Seinn Moh MOH aung zaw HTWE Yoshinori KAJIHARA Takeo YAMAKAWA Plant Nutrition Laboratory Graduate School of Bioresource and Bioenvironmental SciencesFaculty of AgricultureKyushu University6-10-1 HakozakiHigashi-kuFukuoka 812-8581Japan Department of Agronomy Yezin Agricultural UniversityYezinNay Pyi Taw 15013Myanmar University Farm School of AgricultureKyushu UniversityFukuoka 812-8581Japan Plant Nutrition Laboratory Division of Molecular BiosciencesDepartment of Biosciences and BiotechnologyFaculty of AgricultureKyushu University6-10-1 HakozakiHigashi-kuFukuoka 812-8581Japan

We investigated the effects of integrated organic and inorganic fertilizers on the growth and yield of indica rice variety Manawthukha and japonica rice variety *** a split-plot design,the two rice varieties were assigned as main plot factors,and the integrated treatments were the subplot factors,including no-N fertilizer(N0),50%chemical fertilizer(CF)(CF50),100%CF(CF100),50%CF+50%poultry manure(PM)(CF50PM50),50%CF+50%cow manure(CM)(CF50CM50),and 50%CF+50%compost(CP)(CF50CP50).CF100 was equivalent to N at 85 kg/*** was applied based on the estimated mineralizable nitrogen(EMN)level,which is dependent on total N(%)of each manure *** rice plants were taller with higher tiller number and dry matter ***,higher soil-plant analysis development(SPAD)values were measured in Genkitsukushi throughout the crop growth period,resulting in higher seed-setting rate(%)and greater *** the same N level,CF50PM50 application in both rice varieties resulted in higher SPAD values,plant height and tiller number than ***50PM50 containing total N more than 4%supplied synchronized N for the demands of the rice plants,resulting in maximum dry matter,yield and yield ***50CM50 and CF50CP50 treatments containing total N less than 4%resulted in lower yields which were similar to *** results indicated that integrating organic and inorganic fertilizers enhanced growth parameters and yields of Manawthukha and Genkitsukushi,while reducing the dose of chemical fertilizer.

关键词： estimated mineralizable nitrogen growth parameter inorganic fertilizer organic manure rice yield

Active case-finding for tuberculosis by mobile teams in Myanmar:yield and treatment outcomes

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Infectious Diseases of Poverty 2017年第1期6卷 683-690页

作者： Ohnmar myint Saw Saw Petros Isaakidis Mohammed Khogali Anthony Reid Nguyen Binh Hoa Thi Thi Kyaw Ko Ko zaw Tin Mi Mi Khaing Si Thu aung National Tuberculosis Programme Corner of Mingyi Road and Minglar StreetPathein townshipAyeyarwaddy RegionMyanmar Department of Medical Research YangonMyanmar Medecins sans Frontieres Operational Research UnitLuxembourgLuxembourg National Tuberculosis Programme HanoiVietnam Centre for Operational Research International Union Against Tuberculosis and Lung DiseaseParisFrance TB Unit WHO Country Office for MyanmarYangonMyanmar

Background:Since 2005,the Myanmar National Tuberculosis Programme(NTP)has been implementing active case finding(ACF)activities involving mobile teams in hard-to-reach *** study revealed the contribution of mobile team activities to total tuberculosis(TB)case detection,characteristics of TB patients detected by mobile teams and their treatment ***:This was a descriptive study using routine programme data between October 2014 and December *** team activities were a one-stop service and included portable digital chest radiography(CXR)and microscopy of two sputum *** algorithm of the case detection included screening patients by symptoms,then by CXR followed by sputum microscopy for *** patients were started on treatment and followed until a final outcome was ***:A total of 9349 people with symptoms suggestive of TB were screened by CXR,with an uptake of 96.6%.Of those who were meant to undergo sputum smear microscopy,51.4%had sputum ***,504 TB patients were identified by the mobile teams and the overall contribution to total TB case detection in the respective townships was 25.3%.Among total cases examined by microscopy,6.4%were sputum smear positive *** success rate was high as 91.8%in study townships compared to national rate 85%(2014 cohort).Conclusions:This study confirmed the feasibility and acceptability of ACF by mobile teams in hard-to-reach contexts,especially when equipped with portable,digital CXR machines that provided immediate ***,the follow-up process of sputum examination created a significant barrier to confirmation of the *** order to optimize the ACF through mobile team activity,future ACF activities were needed to be strengthened one stop service including molecular diagnostics or provision of sputum cups to all presumptive TB cases prior to CXR and testing if CXR suggestive of TB.

关键词： Mobile team Active case finding Chest X-ray Treatment outcomes

Urbanization,economic development,and environmental changes in transitional economies in the global south:a case of Yangon

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Ecological Processes 2022年第1期11卷 929-945页

作者： Peilei Fan Jiquan Chen Cadi Fung zaw Naing Zutao Ouyang Khaing Moe Nyunt Zin Nwe myint Jiaguo Qi Joseph P.Messina Soe W.myint Brad G.Peter School of Planning Designand Construction and Center for Global Change and Earth ObservationsMichigan State UniversityEast LansingMI 48824USA Department of Geography Environmentand Spatial Sciences and Center for Global Change and Earth ObservationsMichigan State UniversityEast LansingMI 48824USA Department of Geography University of AlabamaTuscaloosaAL 35487USA Mandalay Technology YangonMyanmar Earth System Science Stanford UniversityStanfordCA 94305USA Yangon City Development Committee YangonMyanmar Yangon University YangonMyanmar College of Arts and Sciences University of AlabamaTuscaloosaAL 35487USA School of Geographical Sciences and Urban Planning Arizona State UniversityTempeAZ 85287-5302USA Department of Geosciences University of ArkansasFayettevilleAR 72701PUSA

Background:Transitional economies in Southeast Asia—a distinct group of developing countries—have experienced rapid urbanization in the past several decades due to the economic transition that fundamentally changed the function of their economies,societies and the ***,one of the least developed transitional economies in Southeast Asia,increased urbanization substantially from 25%in 1990 to 31%in ***,major knowledge gaps exist in understanding the changes in urban land use and land cover and environment and their drivers in its ***:We studied Yangon,the largest city in Myanmar,for the urbanization,environmental changes,and the underlying driving forces in a radically transitioned economy in the developing *** on satellite imagery and historic land use maps,we quantified the expansion of urban built-up land and constructed the land conversion matrix from 1990 through *** also used three air pollutants to illustrate the changes in environmental *** analyzed the coupled dynamics among urbanization,economic development,and environmental *** conducting a workshop with 20 local experts,we further analyzed the influence of human systems and natural systems on Yangon’s urbanization and ***:The city of Yangon expanded urban built-up land rapidly from 1990 to 2000,slowed down from 2000 to 2010,but gained momentum again from 2010 to 2020,with most newly added urban built-up land appearing to be converted from farmland and green land in both 1990–2000 and 2010–***,the air pollutant concen-tration of CO decreased,but that of NO_(2)and PM_(2.5)increased in recent years.A positive correlation exists between population and economic development and the concentration of PM_(2.5)is highly associated with population,the economy,and the number of ***,the expert panel also identified other potential drivers for urbanization,including the extreme climate event of Cyclone Nargi

关键词： Urbanization Economic development Environmental change Transitional economy Globalization Extreme climate event Capital relocation Myanmar

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双体量子系统的算子权并发度

北京理工大学学报 2020年第6期40卷 687-690页

作者： aung Khaing zaw 刘锴蒋立宁北京理工大学数学与统计学院北京100081

在Hilbert空间算子理论基础上,通过量子态的约化密度矩阵给出了双体量子系统中算子权并发度的定义,并讨论了其在判断量子态可分性上的有效性.同时研究了此类加权并发度和系统信道的相容性及相关性质.

关键词：量子纠缠算子权并发度量子信道

苯酚和苯胺类化合物对光泽精化学发光的增强和抑制作用

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光谱学与光谱分析 2007年第10期27卷 1945-1950页

作者：石明娟 aung myint 董永平崔华中国科学技术大学化学系安徽合肥230026

研究了苯酚和苯胺类化合物在不同pH下对光泽精-H2O2-Co2+体系化学发光(Chemiluminescence,CL)的影响。在NaHCO3-Na2CO3缓冲体系中,具有吸电子基团或两个-OH处于间位的化合物在中间的pH(即pH9.9)呈现增强作用,其他的化合物呈现抑制作用;... 详细信息

研究了苯酚和苯胺类化合物在不同pH下对光泽精-H2O2-Co2+体系化学发光(Chemiluminescence,CL)的影响。在NaHCO3-Na2CO3缓冲体系中,具有吸电子基团或两个-OH处于间位的化合物在中间的pH(即pH9.9)呈现增强作用,其他的化合物呈现抑制作用;在NaOH体系中,所有的化合物都呈现抑制作用。化合物对光泽精CL增强和抑制作用与化合物的结构、介质、以及介质的pH有关。通过研究光泽精CL反应混合物的荧光光谱以及光泽精体系的CL光谱等,提出了其增强和抑制作用的可能机理。苯酚和苯胺类化合物与光泽精竞争消耗溶液中的H2O2/HO2-,导致了化合物对光泽精CL的抑制作用;同时,苯酚和苯胺类化合物可以作为亲核试剂与光泽精反应形成一种加成物,这种加成物与光泽精相互作用生成光泽精自由基,然后与溶解氧反应产生CL,从而增强光泽精的CL。这两种作用相互竞争,导致了不同的条件下,化合物对光泽精CL增强和抑制作用的出现。

关键词：光泽精苯酚苯胺化学发光 pH

Low-Density Co-Inoculation with Bradyrhizobium japonicum SAY3-7 and Streptomyces griseoflavus P4 Promotes Plant Growth and Nitrogen Fixation in Soybean Cultivars

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American Journal of Plant Sciences 2016年第12期7卷 1652-1661页

作者： aung zaw Htwe Takeo Yamakawa Laboratory of Plant Nutrition Graduate School of Bioresource and Bioenvironmental Sciences Faculty of Agriculture Kyushu University Fukuoka Japan Department of Agronomy Yezin Agricultural University Yezin Myanmar

Inoculation density has a marked effect on nodulation and N fixation in soybean (Glycine max L.). Therefore, we conducted this study to determine the optimal inoculation density of Bradyhizobium japonicum SAY3-7 (SAY3-7) and Streptomyces griseoflavus P4 (P4) for plant growth, nodulation, and N fixation, and to investigate the effect of co-inoculation on selected soybean cultivars, using the optimal inoculation density. Nitrogen fixation, in terms of an acetylene reduction activity value, was measured using a flame ionization gas chromatograph. In this study, low-density single inoculation with P4 (105 or 106 cells mL-1) was associated with the highest plant biomass, compared with normal- and high-density single inoculation with P4 (107 or 108 cells mL-1). Moreover, low-density single or co-inoculations with SAY3-7 and/or P4 produced the highest nodule biomass and highest nitrogenase activity, compared with single or dual inoculation at other inoculation densities. Therefore, we evaluated low-density co-inoculation with P4 and SAY3-7, at the rate of 105 cells mL-1, on selected soybean cultivars. Low-density co-inoculation increased the plant biomass, compared with un-inoculated plants. The effects of single and co-inoculation on nodulation did not differ significantly for any of the cultivars, except “Yezin-9” in the first experiment and “Shan Seine” in the second experiment. Low-density inoculation with both bacteria increased N fixation by 15% - 75% for seven of the cultivars in the first experiment and by 15% - 39% for three of the cultivars in the second experiment, compared with single inoculation with SAY3-7. Based on the overall results, we concluded that low-density co-inoculation with P4 and SAY3-7 gave improved plant growth and N fixation.

关键词： Brayrhizobium japonicum SAY3-7 Streptomyces griseoflavus P4 Inoculation Densities Co-Inoculation Soybean Nitrogen Fixation