We deduce that it is a relic old crust that was brought upwards during the formation of neo - tethyan ophiolite . the step heating 40ar - ' 9ar spectra show that during 100ma , luobusha ophiolite suffered intensely alternation , which affected distinctly the k - ar system ; during 771ma some basalt formed in the country rock of xiubugabu ophiolite ; during 55ma , the pillow basalt of rikangba ophiolite affected by a strong thermal event ; all the variety of ages illustrates possible impacts of the subduction - collision between india and eurasia . through dissecting mainly the gabbro of luobusa ophiolite and studying the 40ar / 39ar ~ ( 40 ) ar ~ ( 39 ) ar阶段升温年龄图谱显示， 100ma左右罗布莎岩体经历了较强的后期蚀变作用，对其k ? ar体系造成明显影响； 77 1ma休古嘎布岩体围岩中形成玄武质火山集块岩； 55ma日康巴岩体岩石枕状玄武岩受到较强热事件影响；这些~ ( 40 ) ar - ~ ( 39 ) ar年龄上的变化显示了印度板块与欧亚板块俯冲?碰撞对该区的强烈影响。
Based on some calculation methods on transverse ground settlement , the mechanics of ground settlement caused by shield tunnel construction are discussed . in combination with the shield driven section from xuanwu gate station to new mofan road station of nanjing metro , the monitoring data are analyzed . mainly zone and the subordinate zone of ground settlement caused by shield tunneling is summed up , and the influence zone are definite 2 、通过对盾构推进产生地表沉降机理的论述，在总结了各种理论计算方法的基础上，结合南京地铁玄武门新模范马路区间的实际情况，实测了大量的横断面数据，并进行分析研究，得出了盾构推进对地表影响的主区域和次区域，明确了盾构推进时对横向地表的影响范围，研究结论具有很好的社会效益和经济效益。
The paper based on synthesize domestic and foreign ' s study achievement about basalt , systematical review basalt research history , present condition about basalt formation contributing factor and it ' s magma source area quality , uses the basalt to distinguish the earth ' s mantle type , the connection basaltic magma evolution and continent dynamics , and uses the basalt to distinguish tectonic environment 系统地综述了玄武岩的成因和岩浆源区性质、利用玄武岩判别地幔类型、玄武质岩浆的演化与大陆动力学关系，以及判别构造环境等方面研究的现状。
The mantle source for the mesozoic mafic volcanic rocks in yanshan area exhibit transition character in space and time : the mantle source components vary from subduction - related metasomatic components and emi components through dominant emi components and slight subduction - related metasomatic components to emi components ; spatially , mantle source of the volcanic rocks show a regular variation trend from an enriched lithospheric mantle with emi - like signatures in the western shandong province through emi and / or subduction - related metasomatic components in yanshan area to subduction - related metasomatic lithospheric mantle in the hinggan - mongolian orogen 燕山地区中酸性火山岩则来源于地壳，与玄武质岩浆底侵作用关系密切。 3燕山地区火山岩源区组分在时空上具有一定的演化规律：在时间上，从早期俯冲交代地幔及emi的参与，经中期以emi占主导及极少量俯冲交代组分的阶段，演变到晚期以emi为主，可能有少量软流圈贡献的组分，再到晚白垩世以软流圈为主。
Located beside the beautiful xuanwu lake of nanjing city , super a translation ( nanjing ) co . , ltd . is a formal company registered at nanjing administration for industry and commerce specialized in providing translation service , and the company has provided translation service at high level to governmental authorities , enterprises , individuals , embassies in china and many multinational corporations 南京领域翻译有限公司坐落在南京美丽的风景区玄武湖旁， 2002年经南京市工商局正式注册为专业的对外翻译服务公司，曾为政府机构、企事业单位、个人、驻华使馆及全球性跨国公司提供了高水准的翻译。
Situated in wangfujing , beijing s busiest and most famous downtown area , nanjing great hotel is uniquely positioned to provide convenience as well as quality service to our guests . in its neighborhood are to be found wangfujing department store , and such attractions as the forbidden city , tian an men square are walking range of the hotel , which also borders on dong huamen specialty food market 北京南京大饭店位于市中心最繁华的王府井商业区，紧临王府井百货大楼， 2004年4月开业，是一座按四星级标准设计建造的现代商务酒店，由连续几年获得“全国星级酒店五十佳”称号的南京玄武饭店负责管理。
I companies are engaged in import and sale of chemical raw materials for the production of chemical products professional companies , companies marketing centres located in nanjing city strip , our xuanwuhu , immediately jiangsu international exhibition center ; production enterprises built in nanjing chemical zone ; research centres located in nanjing university of technology and engineering petrochemical college 我公司是从事进口化工原料销售及精细化工产品生产的专业性公司,公司销售中心座落在南京市繁华地带,背靠玄武湖,紧挨江苏国际展览中心；生产企业建在南京市化工开发区；科研中心设在南京理工大学化工学院。
The new century hotel is located near the beautiful xuanwu lake and railway station . it is a 10 minute walk to the international exhibition center , 2 minutes to nanjing railway station ? and 40 minutes driving to lukou international airport . the public bus stop , adjacent to the hotel , heads to different parts of city -江苏新世纪大酒店隶属于省电信实业集团有限公司，坐落在风景秀丽的玄武湖畔，面对钟山风景区，毗邻南京火车站和国际会展中心，环境优美，交通便捷，是一座国际四星级旅游饭店。
From the research results , we can see that the initial reason , which leads to the degradation of xuanwu lake ecosystem , is pollution . pollution makes the water and sediments hypertrphiation , increases the opacity of water , and decreases the oxygen in water , so the wetland higher plant communities decrease or disappear . the wetland ecosystem loses the balance , while the biodiversity also decreases 研究结果表明，引起玄武湖湿地生态系统功能退化的初始原因是严重的环境污染问题，污染加剧了水体及沉积物中的营养盐含量，增加了水体的浑浊度，降低了水体中的氧含量，从而导致湿地高等植物群落减少乃至消失，尽而引起湿地生物多样性下降、生态系统失去平衡。
This hotel is suitable for leisure travelers who visit the city for pleasure or business travelers who come to this city for business purposes . located near the beautiful xuanwu lake and the drum tower . the jiangsu exhibition hall is on its side and it is about 30km from the airport and 3km from the railway station 它屹立于风光秀丽的玄武湖畔，位于南京最繁华的鼓楼山西路两个商业中心交汇处，地处灯光不夜城湖南路的正中间，与江苏展览馆江苏出版大厦互为犄角，交通十分便利，是商贸旅游客人下榻的极好去处。
