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首页> 外文期刊>Geodinamica Acta >Nature and onset age of neotectonic regime in the northern core of Isparta Angle, SW Turkey
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Nature and onset age of neotectonic regime in the northern core of Isparta Angle, SW Turkey

机译：土耳其西南部伊斯帕塔角北部核心的新构造政权的性质和发病年龄

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摘要

The Isparta Angle (IA) is a reverse Λ-shaped morphotectonic structure located to the north of Antalya Gulf in the Eastern Mediterranean Sea. It resulted from the northward curvature of the originally E-W-trending Tauride orogenic belt owing to the nappe emplacements and related clockwise and anti-clockwise rotations in a time period of Early Paleocene to Early Pliocene. The IA is included in the southwest Anatolian tensional neotectonic domain and characterized by a series of grabens and horsts bounded by active normal faults of dissimilar length and trend. The evolutionary history of the graben-horst system is episodic. It is evidenced by two graben fills. These are older and modern (younger) graben fills separated by an intervening angular unconformity. The modern graben fill is nearly flat-lying (non-deformed) whereas older graben fill was deformed into a series of anticlines and synclines with ENE-trending curvi-linear axes by a short-term compressive tectonic regime operated in NNW-SSE direction during Late Pliocene. The diagnostic structures taking a part in the development of grabens and shaping the northern section of the IA are the margin-boundary normal faults. They occur in numerous single and several fault zones displaying a basin ward facing step-like land shape. Most of fault segments, particularly the master faults, are active and have a capacity of creating destructive earthquakes with a magnitude (up to Mw= 7.0). This is evidenced by both the historical and instrumental period earthquakes. Both the focal mechanism solution of earthquakes and the stereographic plots of slip-plane data, measured on the active margin-boundary faults of various grabens comprising the IA, on the Schmidt lower hemisphere net obviously reveal that the IA is under the influence of the tensional neotectonic regime, not a compressive tectonic regime, i.e. the sinistral strike-slip shearing along the Pliny arc has not propagated yet onshore, and its commencement age is Early Quaternary.
机译：Isparta Angle（IA）是位于地中海东部安塔利亚海湾北部的反向Λ形构造构造。这是由于原始的E-W趋势Tauride造山带向北弯曲所致，这是由于早新世至上新世时期的推覆作用以及相关的顺时针和逆时针旋转。 IA包括在西南安那托利亚的张性新构造域中，其特征是一系列由长短不一且趋势不同的活动正断层界定的grab陷和地壳。 en住系统的进化史是片断的。两个抓斗填充证明了这一点。这些是较旧的和现代的（较年轻的）抓斗填充物，中间夹杂有角度不合格。现代的en石填充物几乎是平坦的（未变形），而较旧的grab石填充物在NNW-SSE方向上沿短期压缩构造机制变形，形成了一系列具有ENE趋势曲线轴线的背斜和向斜。上新世晚期。诊断结构参与grab裂的发展并影响IA的北部，是边缘边界正常断层。它们出现在许多单个和几个断层带中，显示出盆地向内面对阶梯状的土地形状。大多数断层段，特别是主断层段都是活动的，并具有造成破坏性地震的能力（最大Mw = 7.0）。历史地震和仪器地震都证明了这一点。在施密特下半球网上对包括IA的各种grab的活动边缘边界断层测得的地震震源机制解和滑动面数据的立体图都清楚地表明IA处于拉力作用下新构造形式，而不是压缩构造形式，即沿普林尼弧的左旋走滑剪切尚未在陆上传播，其开始年龄为早第四纪。

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