Paleomagnetism of external southern and central Dinarides and northern Albanides: Implications for the Cenozoic activity of the Scutari‐Pec Transverse Zone
Paleomagnetism of external southern and central Dinarides and northern Albanides: Implications for the Cenozoic activity of the Scutari‐Pec Transverse Zone
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南、中迪纳里德斯和北阿尔巴尼德斯外部的古地磁：对斯库塔-佩克横断带新生代活动的影响
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发表时间：
1995
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通讯作者：
V. Miličević
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作者：
C. Kissel;F. Speranza;V. Miličević
对Dinarides外部南部和中部以及北方Albanides外部的43个白垩纪至中新世遗址（500个定向岩心）进行了古地磁调查。来自Dinarides的24个可靠的地点（33个）至少从始新世早期开始就没有记录任何关于非洲的重要旋转。这一结果与先前在从伯罗奔尼撒到地拉那盆地的外部阿尔巴诺-希腊人地斯观测到的非常连贯的始新世后45°顺时针旋转形成对比。这些新的结果表明，位于两个造山带之间的Scutari-Pec线是Dinarides和Albanides之间最近发生扭转的地方，根据地质观测，Scutari-Pec线被认为是中生代转换断层。在局部尺度上，位于阿尔巴尼亚北方的两个山脊上的四个地点（共10个），位于Scutari-Pec线以南，但具有Dinaric趋势，表明这两个结构在始新世后经历了大约30°的顺时针旋转。南北旋转的中间值表明，Scutari-Pec线实际上是一个相当宽的横向带，两个山脊就位于其中。它在新生代和可能直到更新世的时间作为Dinarides和Albano-Hellenides之间的脱钩带。该地区记录的强烈地震活动和异常高的正热流（由其他作者记录）也是Scutari-Pec横向带近期活动的证据。
Paleomagnetic investigations have been conducted on 43 Cretaceous to Miocene sites (500 oriented cores) from the southern and central external Dinarides and from the northern external Albanides. The 24 reliable sites (out of 33) from the Dinarides do not document any significant rotation with respect to Africa since at least early Eocene. This result contrasts with the very coherent post-Eocene 45° clockwise rotation previously observed in the external Albano-Hellenides from Peloponesus to the Tirana basin. These new results suggest that the Scutari-Pec line, located between the two orogens and considered as a Mesozoic transform fault on the basis of geological observations, is the place where the torsion between the Dinarides and the Albanides recently occurred. On a local scale, four sites (out of 10) from two ridges located in northern Albania, south of the Scutari-Pec line but with a Dinaric trend, show that these two structures have undergone a ∼30° post-Eocene clockwise rotation. This intermediate value of rotation between the north and the south suggests that the Scutari-Pec line is, in fact, a rather wide transversal zone in which the two ridges are located. It acted as a decoupling zone between the Dinarides and the Albano-Hellenides during the Cenozoic and probably until the Pleistocene time. The strong seismic activity recorded in this region and the anomalously high positive heat flow (documented by other authors) are also evidence for the recent activity of the Scutari-Pec transverse zone.