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欧洲主要的构造问题之一是与所谓波兰一丹麦凹槽地区,东欧地台的西南边缘有关.通常认为,这个边缘就是T一T构造线(Tornguist一Teisseyre Line),该构造线在欧洲的这部分近于北西一南东走向.确定前寒式纪地台和古生代地台之间接触带的深部地壳结构,是1965一1982年间在波兰进行地震测深(DSS)计划的主要目的. 在T一T构造带,洛九条测线进行了地壳的地震测深,测线总长度约2600 km.地震刚深结果表明,东欧地台边缘带的地壳具有任烈的异常特征.该带的宽度有变化,在波兰西北部为50 km,到它的东南部约为90 km.波兰古生代地台的地壳厚度是30一35 km,前寒式纪地台的地壳厚度是42一47 km,而T一T构造带内的地壳厚度在5似;{55 km之间变化.在T一T带的莫霍界面上方,40一45 km深处,有一地震不连续面,其P波速度从7.5 km八变为7.7 km/5.界面速度、平均速度和地壳的分层,沿T一T带都有明显的变化.在T一T带,还观测到强,狄的重力异常和磁异常.根据这些特征,T一T构造带被确定为一个具有裂谷性质的深部构造凹槽. 匀划出T一T构造带的深部断裂,对确定东欧前寒武纪地台板块边界的位置十分重要.根据DSS的结果,T一T构造带的东北边缘就是东欧地台的一个古板块边界.r.测"1犷 !r’ 己东气二,.厂犷扮5乒)爪6哈茗尸犷合呈叼{巴竺多护半:讼扩鹦试滚梦二品!In攀穿缪二(《日f吕之盆目门l辉袋业介,,然2佗口1公0空00认m’钧J..’~山.司汾/’飞落100 vIZ尸图:波兰古生代和前寒武纪地台之间接触带和EUGENO一S计划区、置图.图例:1-已完成的DSS测线;2-计划中的DSS测线;及地震测深(DSS)测线的位3-炮点。
One of the major structural problems in Europe is related to the so-called southwestern margin of the so-called Polish-Danish groove region, the Eastern European platform, which is generally considered to be the T-T-Teisseyre Line, which in Europe Part of which is close to the NW-SS direction.The determination of the deep crustal structure of the contact zone between the Precambrian and Paleozoic platforms was the main objective of the DSS program in Poland from 1965 to 1982. In T A tectonic belt and a Luo nine measuring line for the seismic crustal seismic sounding with a total length of about 2600 km.The results of the seismic deep results show that the crust of the eastern margin of the platform has a strong anomaly characteristic.The width of the belt Varies from 50 km in the northwestern part of Poland to about 90 km in the southeast of the country.The crustal thickness of the Paleozoic platform in Poland is 30-35 km and the crustal thickness of the Precambrian platform is 42-47 km, The crustal thickness in a tectonic belt varies between 55 km and 55 km. Above the Moho interface in the T-T zone, there is a seismic discontinuity 40 to 45 km deep with a P-wave velocity of 7.5 km Eight to 7.7 km / 5. Interface velocity, average velocity and crustal stratification, along the T-T with a significant change In the T-T zone, strong and di gravity anomalies and magnetic anomalies were also observed. According to these characteristics, the T-T tectonic zone was identified as a deep structural groove with rift properties. T-T The deep faults of tectonic belt are very important for determining the position of plate boundary of Precambrian platform in Eastern Europe.According to the results of DSS, the northeast edge of T-T tectonic belt is an old plate boundary of Eastern Europe platform, 1 rugged! R ’has two gas. The factory played 5 Ping Ping) Haggai claws 6 was presented at the same time {Ba Zhu more than half protection: f Lu of the basin door l Hui bag industry mediated, and then 2 佗 口 1 公 0 空 00 认 m ’钧 J ..’ ~ 山. Secretary Fen / ’Flying 100 vIZ dead Figure: Polish Paleozoic and Precambrian Disciplines between the contact zone and the EUGENO-S planning area, set the figure. Legend: 1-completed DSS line; 2-planned DSS line; and seismic sounding (DSS) Gunpoint.