Cenozoic tectonics of Macedonia and its relation to the South Balkan extensional regime
Cenozoic tectonics of Macedonia and its relation to the South Balkan extensional regime
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马其顿新生代构造及其与南巴尔干伸展体系的关系
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
B. Burchfiel
中科院分区：
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作者：
N. Dumurdžanov;T. Serafimovski;B. Burchfiel
从古近纪到近代，马其顿是南巴尔干伸展区的一部分，爱琴海伸展区的北部。马其顿东部的始新世中晚期开始延伸，在马其顿中部的弧前盆地以东形成了一个北西向东倾斜的半地堑。在渐新世晚期到中新世早期短暂的局部缩短时期之后，第二个新近纪伸展时期开始，一直持续到现在。新近纪伸展有五个旋回，相关沉积发生在复杂成因的伸展盆地中：（1）真地堑，（2）倾斜半地堑，（3）沿走滑断层的拉分盆地，（4）充填地形低洼的断陷盆地，以及（5）混合断层成因的复杂断陷盆地。新近纪断层活动和盆地形成显示出一种模式，从主要在马其顿北部和东部的北西向和东西向断层开始，进展到较年轻的时期，主要是北西向至北向的断层迁移到马其顿西部，而东西向和北西向的断层在马其顿东部占主导地位。古近纪盆地的起源被解释为与沿希腊海沟北部的海沟回滚和弧内厚热地壳的横向扩展有关。新近纪早期短暂的缩短与克鲁亚大陆碎片到达阿尔巴尼亚俯冲带有关。新近纪较晚的伸展以及伸展断层和盆地的向西迁移与希腊海沟北部俯冲板片的逐渐回滚有关。马其顿东部的南北延伸与爱琴海北部北安纳托利亚断层的扩展有关。 6 Ma 和随后的南巴尔干岩石圈向南的运动，是由爱琴海地壳的快速南南向运动引起的，与沿希腊海沟南部的海沟回滚有关。南巴尔干伸展区内的向南延伸量远小于北安纳托利亚断层以南的爱琴海地区。
From Paleogene to Recent time, Macedonia was part of the South Balkan extensional region, the northern part of the Aegean extensional regime. Extension began in the middle to late Eocene in eastern Macedonia with the formation of a NNW-trending east-tilted half graben lying east of a forearc basin in central Macedonia. Following a short-lived period of localized shortening in late Oligocene to early Miocene time, a second period of Neogene extension began that continued to the present. Five cycles of Neogene extension are recognized, and associated sedimentation occurred in extensional basins of complex origins: (1) true graben, (2) tilted half graben, (3) pull-apart basins along strike-slip faults, (4) faulted silled basins filling topographic lows, and (5) complexly faulted basins of mixed fault origin. Neogene faulting and basin formation show a pattern that begins with both NNW- and EW-trending faults in mainly northern and eastern Macedonia progressing to younger times by dominantly NNW- to N-trending faults migrating into western Macedonia and E-W– and NW-trending faults dominant in eastern Macedonia. The origin of the Paleogene basins is interpreted to be related to trench rollback along the northern Hellenic trench and lateral spreading of thick hot crust within an arc. The short period of early Neogene shortening is related to the arrival of the small continental Kruja fragment at the subduction zone in Albania. The younger Neogene extension and westward migration of extensional faulting and basins is related to progressive rollback of the subducted slab in the northern Hellenic trench. The north-south extension in eastern Macedonia is related to the propagation of the North Anatolian fault in the northern Aegean Sea ca. 6 Ma and subsequent movement southward of south Balkan lithosphere north of the fault caused by the rapid SSW movement of the Aegean crust related to trench rollback along the southern Hellenic trench. The amount of southward extension within the Southern Balkan extensional region is much less than that in the Aegean south of the North Anatolian fault.