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Acknowledgement 确认
Pub Date : 2021-12-30 DOI: 10.5564/mgs.v26i53.1789
B. Batkhishig
We sincerely thank to the journal Editors and Invited Reviewers of our open access volumes No 50,  51 and 52. They are the people who make an internationally peer reviewed, open access journal. Reviewer’s helpful and constructive comments led to improvement in each manuscript and successful  volumes.
我们衷心感谢我们开放获取的第50、51和52卷的期刊编辑和特邀审稿人。他们是制作国际同行评审、开放获取期刊的人。审稿人的有益和建设性的意见导致了每一份手稿的改进和成功的卷。
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引用次数: 0
Editorial - Vol. 26, issue. 53 社论-第26卷第一期53
Pub Date : 2021-12-30 DOI: 10.5564/mgs.v26i53.1786
O. Gerel
No Abstract in English
无英文摘要
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引用次数: 0
Lithological mapping using remote sensing techniques: A case study of Alagbayan area, Dornogobi province, Mongolia 利用遥感技术进行岩性填图:以蒙古多诺戈壁省阿拉格巴扬地区为例
Pub Date : 2021-12-30 DOI: 10.5564/mgs.v26i53.1790
Badrakh Munkhsuren, B. Enkhdalai, T. Narantsetseg, Khurelchuluun Udaanjargal, D. Orolmaa, Dolgorjav Munkhjin
This study investigated the multispectral remote sensing techniques including ASTER, Landsat 8 OLI, and Sentinel 2A data in order to distinguish different lithological units in the Alagbayan area of Dornogobi province, Mongolia. Therefore, Principal component analysis (PCA), Band ratio (BR), and Support Vector Machine (SVM), which are widely used image enhancement methods, have been applied to the satellite images for lithological mapping. The result of supervised classification shows that Landsat data gives a better classification with an overall accuracy of 93.43% and a kappa coefficient of 0.92 when the former geologic map and thin section analysis were chosen as a reference for training samples. Moreover, band ratios of ((band 7 + band 9)/band 8) obtained from ASTER corresponds well with carbonate rocks. According to PCs, PC4, PC3 and PC2 in the RGB of Landsat, PC3, PC2, PC6 for ASTER data are chosen as a good indicator for different lithological units where Silurian, Carboniferous, Jurassic, and Cretaceous formations are easily distinguished. In terms of Landsat images, the most efficient BR was a ratio where BRs of 5/4 for alluvium, 4/7 for schist and 7/6 to discriminate granite. In addition, as a result of BR as well as PCA, Precambrian Khutag-Uul metamorphic complex and Norovzeeg formation can be identified but granite-gneiss and schist have not given satisfactory results.
本研究调查了包括ASTER、Landsat 8 OLI和Sentinel 2A数据在内的多光谱遥感技术,以区分蒙古多尔诺戈比省Alagbayan地区的不同岩性单元。因此,主成分分析(PCA)、带比(BR)和支持向量机(SVM)这些广泛使用的图像增强方法已被应用于岩性测绘的卫星图像。监督分类的结果表明,当选择以前的地质图和薄片分析作为训练样本的参考时,Landsat数据给出了更好的分类,总体准确率为93.43%,kappa系数为0.92。此外,从ASTER获得的(带7+带9)/带8)的带比率与碳酸盐岩非常一致。根据陆地卫星RGB中的PCs、PC4、PC3和PC2,ASTER数据的PC3、PC2、PC6被选为不同岩性单元的良好指标,志留系、石炭系、侏罗系和白垩纪地层很容易区分。就陆地卫星图像而言,最有效的BR是冲积层的BR为5/4,片岩的BR为4/7,花岗岩的BR为7/6。此外,由于BR和PCA,可以确定前寒武纪Khutag-Uul变质杂岩和Norovzeeg地层,但花岗片麻岩和片岩没有给出令人满意的结果。
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引用次数: 0
Birth and Developing of Mongolian Geoscientist journal 蒙古国地学期刊的诞生与发展
Pub Date : 2021-12-30 DOI: 10.5564/mgs.v26i53.1791
Yuhei Takahashi, N. Ichinnorov, S. Jargalan, B. Batkhishig
Since the publication of the first issue of Mongolian Geoscientist, in October 1996, 25 years have passed and the journal has successfully evolved over a quarter of a century into a periodical publication well-known also outside the borders of Mongolia. Background and episodes of early publications were reviewed by Y.Takahashi, N.Ichinnorov, and S.Jargalan, who were members of the JICA-IGMR project. The present status of Mongolian Geoscientist is that of an internationally peer-reviewed, open-access journal, published by the School of Geology and Mining Engineering, Mongolian University of Science and Technology, with support from the Geological Society of Mongolia; managed by Editor-in-Chief B.Batkhishig, Consultant Editorial Board member O.Gerel, and Associate Editors B.Munkhtsengel, B.Altanzul, and Kh.Tseedulam.
自1996年10月第一期《蒙古地球科学家》创刊以来,25年过去了,该杂志已成功发展成为蒙古国境外知名的期刊。Y.Takahashi、n.i ichinnorov和s.j jargalan是JICA-IGMR项目的成员,他们对早期出版物的背景和情节进行了审查。《蒙古地球科学家》目前的地位是由蒙古科技大学地质与矿业工程学院在蒙古地质学会的支持下出版的国际同行评议、开放获取的期刊;主编B.Batkhishig,顾问编辑委员会成员O.Gerel,副主编B.Munkhtsengel, b . altanul和h. tseedulam。
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引用次数: 0
The 2021 Mw 6.7 Khankh earthquake in the Khuvsgul rift, Mongolia 2021年蒙古Khuvsgul裂谷发生的Mw 6.7 Khankh地震
Pub Date : 2021-06-23 DOI: 10.5564/mgs.v26i52.1361
D. Battogtokh, A. Bayasgalan, Kang Wang, Davaasuren Ganzorig, Jargalsaikhan Bayaraa
A Mw 6.7 occurred at Lake Khuvsgul in northwestern Mongolia at 05:32:56 AM Ulaanbaatar time on the 12th of January 2021. The epicenter of the event was offshore south of the Doloon Uul peninsula around 30 km SSW of Khankh village. Shaking was felt within most of central and western Mongolia, including the capital city Ulaanbaatar ~600 km from the epicenter. The earthquake appears to have ruptured the Khuvsgul fault along the western coast of Lake Khuvsgul. The earthquake is the largest in Mongolia since the Mw 6.3 Busiin Gol earthquake in 1991. Our research team from the Institute of Astronomy and Geophysics, Mongolian Academy of Sciences visited the epicenter area for 5 days soon after the earthquake and installed four broad-band seismic stations and searched the area for geological evidence of the earthquake. The location, azimuth, dip and depth of this earthquake defined by moment tensor solutions calculated by the international seismological centers and analysis of InSAR interferograms and field observations. The projected intersections of the east-dipping nodal planes with the surface for solutions of the international seismological centers and researchers correlate relatively well with the mapped strike and location of the old tectonic scarp of the Khuvsgul fault although we have not discovered any primary co-seismic surface rupture. The InSAR interferogram demonstrates the sharp discontinuity and fringes in the area between the Western Range and Doloon Uul peninsula which implies surface deformation. Aftershocks that have continued during the three months subsequent to the earthquake define overall strike of the mainshock rupture.
2021年1月12日乌兰巴托时间凌晨05:32:56,蒙古西北部的Khuvsgul湖发生Mw 6.7。事件的震中位于多隆乌勒半岛以南的近海,距离Khankh村SSW约30公里。蒙古中西部大部分地区都有震感,包括距离震中约600公里的首都乌兰巴托。地震似乎使Khuvsgul湖西海岸的Khuvsgull断层断裂。这次地震是蒙古自1991年布什林格尔里氏6.3级地震以来最大的一次地震。我们来自蒙古科学院天文与地球物理研究所的研究小组在地震发生后不久对震中地区进行了为期5天的访问,安装了四个宽带地震台,并在该地区寻找地震的地质证据。国际地震学中心计算的矩张量解以及InSAR干涉图和现场观测的分析定义了此次地震的位置、方位角、倾角和深度。国际地震中心和研究人员的解决方案中,向东倾斜的节点平面与地表的投影交点与绘制的Khuvsgul断层旧构造陡崖的走向和位置相对较好,尽管我们尚未发现任何主要的同震地表破裂。InSAR干涉图显示了西部山脉和多隆乌勒半岛之间区域的尖锐不连续性和条纹,这意味着表面变形。在地震后的三个月里持续的余震定义了主震断裂的总体走向。
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引用次数: 7
Editorial 编辑
Pub Date : 2021-06-23 DOI: 10.5564/mgs.v51i0.1461
B. Batkhishig
No Abstract in English
无英文摘要
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引用次数: 0
Modern glacier dynamics in Mt. Tsambagarav in the Mongolian Altai Mountain Range 蒙古阿尔泰山脉Tsambagarav山现代冰川动力学
Pub Date : 2020-12-21 DOI: 10.5564/mgs.v51i0.1458
Tuyagerel Davaagatan, A. Orkhonselenge
This study presents the modern glacier dynamics in Mt. Tsambagarav in the Mongolian Altai Mountain Range over the last four decades. This is the first review of this type of glacier dynamics for this massif. Changes in glacier area in Mt. Tsambagarav are estimated using normalized indexes (Normalized Difference Snow Index and Normalized Difference Principal Component Snow Index). Spatial distribution of the modern glaciers delineated with Landsat Multispectral Scanner (MSS: resolution of 80 m), Landsat Thematic Mapper (TM: resolution of 30 m) and Landsat Operational Land Imager (OLI: resolution of 30 m) imageries. Result shows that Mt. Tsambagarav has lost 51.7% of the glacier area from 132.24 km2 in 1977 to 63.92 km2 in 2017. The loss in glacier area for Mt. Tsambagarav during the last 40 years reflect the rapid response of the modern glacier to climate change, i.e., it is highly sensitive to solar insolation and/or rapidly rising local and regional mean annual temperatures. The remote sensing data and field survey suggest that the modern glaciers would be disappeared on a scale of decades. Rapid melting of the glacier in this massif contributes to surface water resources in western Mongolia. This study demonstrates the importance of spatial analysis in the remote area for understanding the context of changes in the modern glaciers.
本文研究了近40年来蒙古阿尔泰山脉Tsambagarav山的现代冰川动态。这是第一次对这一地块的冰川动力学进行回顾。利用归一化雪指数(归一化差雪指数)和归一化差主成分雪指数(归一化差主成分雪指数)估算了Tsambagarav山冰川面积的变化。利用Landsat多光谱扫描仪(MSS:分辨率为80 m)、Landsat专题成像仪(TM:分辨率为30 m)和Landsat业务陆地成像仪(OLI:分辨率为30 m)图像圈定的现代冰川的空间分布。结果表明,Tsambagarav山冰川面积从1977年的132.24 km2减少到2017年的63.92 km2,减少了51.7%。近40年来Tsambagarav山冰川面积的减少反映了现代冰川对气候变化的快速响应,即对太阳日照和/或当地和区域年平均气温的快速上升高度敏感。遥感数据和实地调查表明,现代冰川将在几十年内消失。该地块冰川的快速融化为蒙古西部的地表水资源提供了重要的资源。这项研究证明了在偏远地区进行空间分析对于了解现代冰川变化背景的重要性。
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引用次数: 0
PCA analysis of soil geochemical data and environmental assessment of the pre-mining Shuteen area, South Mongolia 蒙南舒汀矿区采前土壤地球化学数据的主成分分析及环境评价
Pub Date : 2020-12-21 DOI: 10.5564/mgs.v51i0.1459
B. Batkhishig, Bayarbold Manzshir, B. Munkhtsengel, Tsuchiya Noriyoshi
There are widespread mineralized systems, occurrences, deposits that occurred in the South Gobi, Mongolia, where many of them already undergone mining activity. However, not all of them have a pre-mining environmental assessment. The Shuteen area is one of these highly prospective areas for mining; due to the porphyry copper system observed, prospecting and exploration projects have been carried out since 1980. Numerous prospecting and exploration works have been done during 1997–2007 and suspended last decade because of economic and political reasons. The area is located in a Gobi-desert environment and wind plays a main role in the transport and mobility of the elements. This research was conducted to assess the environmental condition of the area, based on soil, dry river sediment, and drinking water geochemistry. We are expecting the area has a naturally high concentration of some heavy metals in soil, concerning the geology and mineralization. The results show that the heavy metal content in the soil does not exceed the permissible limit of the Mongolian National standard on soil quality. Whereas, the water samples contain F- above the permissible limit guided in the Mongolian National Standard on drinking water quality. The unusual chemical composition of the water is related to the soil composition characteristic of the Gobi region. They are characterized by low alkali, high salinity and mineral/water ratios are high. Environmental assessment surveys determine the characterization of an areal geochemical base prior the development of later exploration or mining project, might have affect it and establish the initial environmental status.
蒙古南戈壁有广泛的矿化系统、矿点和矿床,其中许多已经进行了采矿活动。然而,并非所有矿山都进行了开采前环境评估。Shuteen地区是这些极具开采前景的地区之一;由于观测到斑岩铜系,自1980年以来一直在进行找矿和勘探项目。1997年至2007年期间,由于经济和政治原因,进行了大量勘探和勘探工作,并在过去十年中暂停。该地区位于戈壁沙漠环境中,风在元素的运输和流动中起着主要作用。本研究旨在根据土壤、干燥河流沉积物和饮用水地球化学,评估该地区的环境条件。就地质和矿化而言,我们预计该地区土壤中的一些重金属自然浓度很高。结果表明,土壤中重金属含量未超过蒙古国土壤质量标准的允许限值。然而,水样中的F-含量超过了蒙古国饮用水质量国家标准中规定的允许限值。水的异常化学成分与戈壁地区的土壤成分特征有关。它们具有低碱、高盐度和高矿水比的特点。环境评估调查在开发后期勘探或采矿项目之前确定区域地球化学基础的特征,可能对其产生影响,并确定初始环境状况。
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引用次数: 1
Lower Permian basaltic agglomerate from the Tsengel River valley, Mongolian Altai 蒙古阿尔泰岑格尔河流域下二叠世玄武岩团聚体
Pub Date : 2020-12-21 DOI: 10.5564/mgs.v51i0.1457
K. Hrdličková, B. Altanbaatar, P. Hanžl, Alice Zavřelová, J. Míková
A new occurrence of Permian volcanic and volcaniclastic rocks in the Mongolian Altai south of the Main Mongolian Lineament was described between soums of Tugrug and Tseel in Gobi-Altai aimag. Studied vitrophyric pyroxene basalt lies in a layer of agglomerate and amygdaloidal lavas, which is a part of NE–SW trending subvertical sequence of varicolored siltstones and volcaniclastic rocks in the Tsengel River valley. This high-Mg basalt is enriched in large ion lithophile elements, Pb and Sr and depleted in Nb and Ta. LA-ICP-MS dating on 44 spots reveals several concordia clusters. The whole rock geochemistry of sample fits volcanic arc characteristic in the geotectonic discrimination diagrams. Dominant zircon data yield Upper Carboniferous and Permian magmatic ages 304.4 ± 2.3 and 288.6 ± 1.9 Ma. Two smaller clusters of Upper Devonian (376 ± 4.7 Ma) to Lower Carboniferous ages (351.9 ± 3.5 Ma) indicate probably contamination of ascending magmatic material. Youngest Triassic age found in three morphologically differing grains reflects probably lead loss. Described high-Mg basalt lava represents sub-aerial volcanism in volcanic arc environment developed over the N dipping subduction zone in the southwestern Mongolia in the time span from Uppermost Carboniferous to Permian during terminal stage of its activity.
在蒙古主山脉以南的蒙古阿尔泰地区,在戈壁-阿尔泰省Tugrug区和Tseel区之间,发现了一个新的二叠纪火山岩和火山碎屑岩。所研究的玻璃体辉石玄武岩位于一层团聚体和杏仁状熔岩中,是Tsengel河谷中NE–SW走向的各种颜色的粉砂岩和火山碎屑岩亚垂直序列的一部分。这种高镁玄武岩富含大离子亲石元素Pb和Sr,并贫含Nb和Ta。44个点的LA-ICP-MS测年揭示了几个协和星团。样品的全岩地球化学特征符合大地构造判别图中的火山弧特征。主要锆石数据显示,上石炭系和二叠纪的岩浆年龄分别为304.4±2.3和288.6±1.9 Ma。上泥盆纪(376±4.7 Ma)至下石炭系(351.9±3.5 Ma)的两个较小的岩簇表明,上升岩浆物质可能受到污染。在三个形态不同的颗粒中发现的最年轻的三叠纪可能反映了铅的流失。所描述的高镁玄武岩熔岩代表了蒙古西南部北倾俯冲带上火山弧环境中的亚空中火山活动,时间跨度为石炭系上新世至二叠纪。
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引用次数: 0
Investigаtion аnd Evaluation of Ecologicаl Destruction in А Mining Аreа in Mongoliа 蒙古А矿业Аreа生态破坏调查与评价
Pub Date : 2020-12-21 DOI: 10.5564/mgs.v51i0.1460
Zijun Li, Purevsuren Tsogt
Аim of this study wаs to cаlculаte economic vаlue of destructed lаnd in Mongoliа in order to fаcilitаte restorаtion of mining аreа. Totаl economic vаlue is а universаl frаmework for estimаting аnd evаluаting economicаl dаmаge cаuse to environment due to mining аctivities аnd other technogenic production аctivities. Compensаtion for environmentаl аnd finаnciаl dаmаge cаn be determined bаsed on the following three cаtegories: initia restoration, restoration by compensation and evaluation of ecological damage. Main object of this study is direct economic vаlue of destructed environment due to Tumurtei iron ore mine аctivity. Аll estimаtions in this pаper аre mаde аccording to Mongoliаn legislаtion аnd lаws. During thаt project а totаl of 511.9 hectаres of аreа аre exposed to environment destruction. Estimаtion of ecologicаl dаmаge аre consisting of following pаrts: dаmаge to soil, dаmаge to surfаce аnd groundwаter resources, dаmаge to forest resources, dаmаge to vegetаtion аnd dаmаge to аnimаl fаunа. The аssessment of ecologicаl аnd finаnciаl dаmаge to the environment is performer in following stаges: 1. determine the аmount of potentiаl dаmаge to the environment; 2. cаlculаte аnd determine the аmount of dаmаge reduced аs а result of meаsures to reduce or eliminаte dаmаge to the environment during production аctivities; 3. estimаte the аmount of аctuаl dаmаge resulting from the operаtion. Results of this study concerning interests of mining entities аnd public entities, who аre in chаrge of regulаting such аctivities.
Aim of this study wás to cálculáte economic válue of destructed lánd in Mongoliaàin order to facilitáte restoration of miningárea.Totál economic válue isáuniversál framework for estimátingánd evaluating economicál dámáge cáuse to environment due to mining activities and other technogenic production activities.Compensation for environmentálánd finánciál dámáge cán be determined básed on the following three cátegories:initia restoration,restoration by compensation and evaluation of ecological damage.Main object of this study is direct economic válue of destructed environment due to Tumurtei iron ore mineáctivity.A ll estimations in this páperáre mádeáccording to Mongolian legislátionànd láws.During That projectàtotaál of 511.9 hectares of Areásàre exposed to environment destruction.Estimation of ecologicál dámágeáre consisting of following párts:dámáge to soil,dámáge to surfáce and nd groundwater resources,dámáge to forest resources,dámáge to vegetation and nd dámáge to animál fáuna.The assessment of ecologicálánd finánciál dámáge to the environment is performer in following stages:1.Determine the amount of potential dámáge to the environment;2.Cálculateánd determine the amount of dámáge reducedásàresult of measures to reduce or eliminate dámáge to the environment during production activities;3.Estimate the amount of actuál dámáge resulting from the operation.Results of this study concerning interests of mining entitiesànd public entities,whoàre in charge of regulating suchàctivities.
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引用次数: 0
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Mongolian Geoscientist
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