Continental transform margins are characterized by sub-vertical strike-slip faults and rapid change in thermal gradient across the margin from continental to oceanic crust. The continental crust terminates abruptly along such sheared margins. Tectonic evolution associated with sedimentation in continental slope of the Palar–Pennar transform margin is inadequately understood due to limited seismic data and/or poor imaging with few well controls. Exploratory drilling attempts for hydrocarbon presence have resulted in some promising outcomes in the Palar–Pennar basin.

The Palar–Pennar graben in onland is bound by steep normal rift faults, which reactivated by strike-slip movement during late syn-rift time as Antarctica separated along the NNW to ∼ N-trending Coromandal transform margin in the offshore part. The pre-existing Precambrian shear zones and lineaments in the basement have played a governing role in the basin development. The onland drainage pattern is structurally controlled as observed from its rectangular drainage pattern, tectonic index and sinuosity index. In offshore area of the basin, seismic interpretation identifies distinct pull-apart rift basins along the Coromandal transform margin with syn-rift deposits in the lower continental slope portion. Strike-slip movement uplifted the fault blocks in the southern part of the pull-apart basin. This has also reactivated some of the rift faults in the syn-rift section. Such reactivation results in early post-rift seal breach. This tectonic event has implication in the depositional sequences, which has been portrayed by seismic stratigraphic analysis and construction of chronostratigraphic section across the transform margin in this work. Thickening of post-rift deposition towards E -SE, major hiatus, large scale mass transport complexes and erosional events have been identified from such analysis. On this basis, seven distinct tectonic sequences, M1 to M5 in Mesozoic and T1 and T2 in Tertiary, have been identified. The chronostratigraphic section can help in deciphering the relative sea level changes based on the nature of stratal terminations, extent of erosion and non-deposition. This study emphasizes the tectonic-controlled drainage system and geometry as well as sedimentation pattern in onland and offshore deepwater area of Palar – Pennar basin alongside the Coromondal transform margin.

大陆转换边缘的特征是亚垂直走滑断层和从大陆到海洋地壳边缘的热梯度快速变化。大陆地壳沿着这样的剪切边缘突然终止。由于有限的地震数据和/或几乎没有井控的成像不良，与帕拉尔-彭纳尔转换边缘大陆斜坡沉积相关的构造演化了解不足。油气存在的勘探钻探尝试在帕拉尔-彭纳尔盆地取得了一些有希望的成果。

陆上的Palar-Pennar地堑被陡峭的正向裂谷断层所束缚，随着南极洲沿NNW向近海部分的~N向Coromandal转换边缘分离，在同裂谷晚期的走滑运动重新激活了这些裂谷断层。基底中预先存在的前寒武纪剪切带和线纹在盆地开发中发挥了主导作用。陆上排水格局从矩形排水格局、构造指数和弯曲度指数观察得到结构控制。在盆地的近海区域，地震解释确定了沿科罗曼达尔转换边缘的明显拉裂裂谷盆地，在大陆斜坡下部具有同裂谷沉积物。走滑运动抬升了拉分盆地南部的断块。这也重新激活了同裂谷部分的一些裂谷断层。这种重新激活导致早期的裂谷后密封破裂。这一构造事件对沉积层序有影响，本工作通过地震地层分析和跨转换边缘的年代地层剖面构建进行了描述。从这种分析中已经确定了向 E -SE 方向的裂谷后沉积物增厚、主要裂隙、大规模质量传输复合体和侵蚀事件。在此基础上，确定了中生代M1～M5和第三纪T1、T2这7个不同的构造层序。年代地层剖面可以帮助根据地层终止的性质、侵蚀程度和非沉积来破译相对海平面的变化。