Buildings Damages after Elazığ, Turkey Earthquake on January 24, 2020     

Dogan  Gamze  Ecemis  Ali Serdar  Korkmaz  Serra Zerrin  Arslan  Musa Hakan  Korkmaz  Hasan Husnu 《Natural Hazards》2021,109(1):161-200

A 6.8-magnitude earthquake that occurred on January 24, 2020, has been effective in Turkey’s eastern regions. The earthquake, with recorded peak ground acceleration (PGA) value of 0.292 g, caused the destruction or heavy damage of buildings, especially in the city center of Elaz?? province. The purpose of this paper was to share the results of detailed investigation in the earthquake-stricken area. Additionally, the causes of damages and failures observed in the buildings were compared to those that had occurred in previous earthquakes in Turkey. In this study, the damages observed in especially RC buildings as well as in masonry and rural buildings were summarized, the lessons learned were evaluated, and the results were interpreted with reference to Turkish earthquake codes. In the study, it was particularly emphasized why the building stock underwent such damage even though the buildings were exposed to earthquake acceleration well below the design acceleration values.

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中国塔吉克族人口发展初探     

吐尔.  马 《干旱区地理》1995,18(3):72-78

本文根据全国历来四次人口普查资料，对我国塔吉克族人口形热进行了简要的论述。文中阐述了塔吉克族人口规模的发展、变化以及人口再生产类型，并简述了相关的社会、经济、文化等方面的问题。  相似文献   

Petrogenesis of ultramafic and mafic rocks of the Thompson Nickel Belt,Manitoba     

A. Dogan Paktunc 《Contributions to Mineralogy and Petrology》1984,88(4):348-353

Abundant sill-like bodies of serpentinized ultramafic rocks, with associated nickel sulfide deposits, are found on the western side of the Thompson Nickel Belt near the Moak Lake-Setting Lake cataclastic fault zone. The ultramafic rocks range in composition from dunite to orthopyroxenite and feature variable alteration. Chemical variation across the bodies is suggestive of in-situ differentiation controlled mainly by olivine and orthopyroxene. Relative abundances of some elements, incompatible for olivine and orthopyroxene, suggest a parental liquid of komatiitic affinity. Ultramafic and mafic rocks are petrogenetically linked. A high degree of partial melting of mantle material and subsequent low-pressure crystal fractionation are responsible for the spectrum of composition from ultramafic to mafic.Publication 19-84, Ottawa-Carleton Centre for Geoscience Studies  相似文献   

Comment on “Structural characterization of poorly-crystalline scorodite, iron(III)-arsenate co-precipitates and uranium mill neutralized raffinate solids using X-ray absorption fine structure spectroscopy” by N. Chen, D.T. Jiang, J. Cutler, T. Kotzer, Y.F. Jia, G.P. Demopoulos and J.W. Rowson     

Dogan Paktunc 《Geochimica et cosmochimica acta》2010,74(15):4589-4596

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Reply to the discussion on “Prediction of ground vibrations resulting from the blasting operations in an open pit mine by adaptive neuro-fuzzy inference system” by Yavuz Karsavran     

Melih Iphar  Mahmut Yavuz  Hakan Ak 《Environmental Earth Sciences》2010,60(6):1343-1345

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Kinematics of the eastern part of the North Anatolian Fault Zone     

Haluk Ozener  Esen Arpat  Semih Ergintav  Asli Dogru  Rahsan Cakmak  Bulent Turgut  Ugur Dogan 《Journal of Geodynamics》2010,49(3-4):141-150

The North Anatolian Fault Zone (NAFZ), which marks the boundary between Anatolia and the Eurasian plate, is one of the world's most seismically active structures. Although the eastern part of NAFZ has high seismic hazard, there is a lack of geodetic information about the present tectonics of this region. Even though many scientists would like to study this area, geographical and logistical problems make performing scientific research difficult. In order to investigate contemporary neotectonic deformation on the eastern NAFZ and in its neighborhood, a relatively dense Global Positioning System (GPS) monitoring network was established in 2003. Geodetic observations were performed in three GPS campaigns in an area of 350 km × 200 km with 12-month intervals. In addition, 14 new GPS stations were measured far from the deforming area. Since this region includes the intersection of the NAFZ and the East Anatolian Fault Zone (EAFZ), deformation is complex and estimating seismic hazard is difficult. One important segment is the Yedisu segment and it has not broken since the 1784 earthquake. After the 1992 Erzincan and 2003 Pulumur earthquakes, the Coulomb stress loading on the Yedisu segment of the NAFZ has increased significantly, emphasizing the need to monitor this region. We computed the horizontal velocity field with respect to Eurasia and strain rates field as well. GPS-derived velocities relative to Eurasia are in the range of 16–24 mm/year, which are consistent with the regional tectonics. The principal strain rates were derived from the velocity field. Results show that strain is accumulating between the NAFZ and EAFZ along small secondary fault branches such as the Ovacik Fault (OF).  相似文献   

Regional vertical total electron content (VTEC) modeling together with satellite and receiver differential code biases (DCBs) using semi-parametric multivariate adaptive regression B-splines (SP-BMARS)   总被引：3，自引：2，他引：1  

Murat Durmaz  Mahmut Onur Karslioglu 《Journal of Geodesy》2015,89(4):347-360

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SPB stars in the open SMC cluster NGC 371     

C. Karoff  T. Arentoft  L. Glowienka  C. Coutures  T. B. Nielsen  G. Dogan  F. Grundahl  H. Kjeldsen 《Monthly notices of the Royal Astronomical Society》2008,386(2):1085-1091

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Recent developments of the Middle East catalog   总被引：8，自引：2，他引：6  

Mehdi Zare  Hamideh Amini  Pouye Yazdi  Karin Sesetyan  Mine Betul Demircioglu  Dogan Kalafat  Mustafa Erdik  Domenico Giardini  M. Asif Khan  Nino Tsereteli 《Journal of Seismology》2014,18(4):749-772

This article summarizes a recent study in the framework of the Global Earth model (GEM) and the Earthquake Model of the Middle East (EMME) project to establish the new catalog of seismicity for the Middle East, using all historical (pre-1900), early and modern instrumental events up to 2006. According to different seismicity, which depends on geophysical, geological, tectonic, and seismicity data, this region is subdivided to nine subregions, consisting of Alborz–Azerbaijan, Afghanistan–Pakistan, Saudi Arabia, Caucasus, Central Iran, Kopeh–Dagh, Makran, Zagros, and Turkey (Eastern Anatolia; after 30° E). After omitting the duplicate events, aftershocks, and foreshocks by using the Gruenthal method, and uniform all magnitude to Mw scale, 28,244 main events remain for the new catalog of Middle East from 1250 B.C. through 2006. The magnitude of completeness (Mc) was determined as 4.9 for five out of nine subregions, where the least values of Mc were found to be 4.2. The threshold of Mc is around 5.5, 5.0, 4.5, and 4.0, for the time after 1950, 1963, 1975, and 2000, respectively. The average of teleseismic depths in all regions is less than 15 km. Totally, majority of depth for Kopeh–Dagh and Central Iran, Zagros, and Alborz–Azerbaijan, approximately, is 15, 13, and 11 km and for Afghanistan–Pakistan, Caucasus, Makran, Turkey (after 30° E), and Saudi Arabia is about 9 km.  相似文献   

吉尔吉斯斯坦西南部两栖爬行动物物种多样性          下载免费PDF全文

吾玛尔·阿布力孜  胡红英  马合木提·哈力克  艾尼瓦尔·吐米尔 《干旱区地理》2013,36(4):591-600

为了进一步了解吉尔吉斯斯坦两栖爬行动物物种多样性特征,于2012年9月15日～26日,在对吉尔吉斯斯坦西南部不同生境两栖爬行动物物种多样性进行野外实地调查和已有文献整理的基础上,初步整理出了分布在吉尔吉斯斯坦西南部的两栖爬行动物种类,并其物种多样性进行比较分析。本次考察共采集和记录实体标本621号,经鉴定共26种（亚种）,分隶4目10科18属,其中两栖纲1目2科2属2种,爬行纲3目8科16属22种。其中新疆蟾蜍（Bufo pewzowi）、亚洲林蛙（Rana asiatica）、赛氏沙蜥（Phrynocephalus saidalievi）三个种为优势种类,占总个体数的55.23%;快步麻蜥（Eremias velox）、喜山岩蜥（Laudakia himalayana）、草原蜥（Trapelus agilis）、荒漠无脸蜥（Ablepharus deserti）、施氏石龙子（Eumeces schneideri）、叶城麻蜥（Eremias yarkandensis）、棋斑游蛇（Natrix tessellata）、白条锦蛇（Elaphe dione）、中亚眼镜蛇（Naja oxiana）、四爪陆龟指名亚种（Testudo horsfieldii horsfieldii）11种类为常见种,占总个体数的36.88%;新疆岩蜥（Laudakia stoliczkana）、敏麻蜥（Eremias arguta）、捷蜥蜴（Lacerta agilis）、红沙蠎（Eryx miliaris）、东方沙蠎（Eryx tataricus）、草原蝰（Vipera renardi）等12各种为稀有种类,占总个体数的7.89%。在不同生境间均存在物种多样性指标差异显著（p<0.05）,物种多样性在草原最高（2.029 8）,其次为山地森林（1.920 4）,而荒漠最低（0.233 8）;丰富度均在山地森林最高（3.242 51）,其次为草原（2.540 0）,而在荒漠最低（0.288 5）;由于吉尔吉斯斯坦西南部的气候属于典型的大陆性气候,两栖爬行动物物种的组成主要以适应干旱环境的耐旱种类为主,区系组成较为简单,地方种类数量较少,在物种组成及起源等方面与我国西北地区的两栖爬行动物区系有着一定的联系。  相似文献