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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Extension of Gundlakamma River Fault over Eastern Continental Margin of India
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Extension of Gundlakamma River Fault over Eastern Continental Margin of India

机译：冈拉卡玛河断层在印度东部大陆边缘的延伸

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Ongole and its surrounding region has been subjected to structural deformation for the past 3000 Ma. An attempt has been made to study the tectonics in and around Ongole region, in particular along the Gundlakamma River and its significance in the offshore region. The lineament and physiographic map (Figure 1 a) indicates presence of NW–SE and NE– SW trending regional faults1–3. Ongole and the adjoining Nizampatnam Bay arecontrolled by several NE–SW trending depressions and ridges (Figure 1 b)4. The region around Ongole is drained by Gundlakamma, Musi, Palem and Manneru rivers. The NW–SE lineaments control the Musi, Palem and Gundlakamma rivers. Since the flow pattern of these rivers shows probable offshore extension, it may be assumed that submerged rivers are also probably controlled by lineaments. The epicentre data (Figure 1 a) shows that most of the earthquakes are concentrated along NW–SE trending lineaments. Ongole and its surrounding areas experienced intermittent seismic activity of moderate magnitude (~5–5.8) earthquakes. The seismic activity is associated with local and regional tectonic disturbances in and around Ongole. Figure 1 a shows clustered epicentre disturbances of earthquakes aligned in NW– SE direction along Gundlakamma River, north of Ongole, which is mostly controlled by a major tectonic lineament. It is essential to study the geophysical signatures in the offshore region of Ongole to ascertain the link between structures on and off the coast; the study provides an input to understand the neo-tectonic activity in this region.
机译：昂戈尔及其周边地区在过去的3000 Ma内经历了结构变形。曾尝试研究Ongole地区及其周围地区，尤其是Gundlakamma河沿岸的构造及其在近海地区的意义。地形图和地貌图（图1a）表明存在西北偏南SE和东北偏南SW趋势的区域性断层1-3。 Ongole和毗连的Nizampatnam湾受到几个NE–SW趋势的洼地和山脊的控制（图1b）4。 Ondl周围的地区被Gundlakamma，Musi，Palem和Manneru河流排干。 NW-SE阵线控制着Musi，Palem和Gundlakamma河流。由于这些河流的水流模式显示出可能的近海扩展，因此可以假设淹没的河流也可能受谱系控制。震中数据（图1a）表明，大部分地震都集中在NW-SE趋势线上。 Ongole及其周边地区经历了中度（〜5–5.8）地震的间歇性地震活动。地震活动与昂戈尔及其周围的局部和区域构造扰动有关。图1a显示了沿Ongole北部的Gundlakamma河沿NW-SE方向排列的地震震中的聚集震源，该震源主要受主要构造构造控制。必须研究昂戈尔近海地区的地球物理特征，以查明沿岸和沿岸结构之间的联系;该研究为理解该地区的新构造活动提供了投入。

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