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首页> 外文会议>International Conference on Earth Science, Mineral, and Energy >Pre-tertiary stratigraphy of the Tanimbar Islands, Indonesia
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Pre-tertiary stratigraphy of the Tanimbar Islands, Indonesia

机译：印度尼西亚的Tanimbar群岛的前三级地层

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Relatively few Pre-Tertiary outcrop examples of the Tanimbar Islands have been described in the literature. Pre-Tertiary rocks outcrop at these islands is hardly found due to high levels of weathering and dense vegetation. This area needs a further geological work because this is one of the few areas near offshore of Arafura Sea where we can get Pre-Tertiary rocks outcrop analog for subsurface interpretation. This paper is aim to recognize the stratigraphic successions of the Pre-Tertiary sedimentary rocks exposed in the study area based on their lithological characteristic and palynological ages. The methods used are geological fieldwork and palynological analysis for samples obtained. Four lithostratigraphic units are recognized from the outcrops: 1) Late Triassic (Carnian-Norian) limestone, sandstone, and claystone of Wotar Formation with the depositional environment at the marine environment with storm influence. 2) Early to Middle Jurassic (Hettangian-Bajocian) sandstone and claystone of Selu Formation, that was deposited at the marine environment with tide influence. 3) Early Cretaceous (Berriasian-Barremian) red and brown claystone and siltstone of Arumit Formation which was deposited at an open-coast tidal flat setting, and 4) Early to Late Cretaceous (Aptian-Santonian) sandstone of Ungar Formation, which was deposited at an open-coast wave-dominated depositional environment. Uppermost Middle to Late Jurassic outcrop was not found in the studied area. This time interval is probably represented by the clay dominated matrix of mud volcano matrix.
机译：在文献中描述了坦布尔群岛的相对较少的预先俯卧撑例。由于高水平的风化和浓密植被，这些岛屿的前三级岩石露头几乎没有发现。该地区需要进一步的地质作品，因为这是Arafura海洋海上近几个地区之一，在那里我们可以获得预先岩石露头的模拟用于地下解释。本文旨在识别基于其岩性特征和腭痛的研究领域暴露的第三级沉积岩的地层继承。所用方法是所获得的样品的地质实地，术语分析。四个岩石车辆单位从露头认识到：1）晚期三叠纪（Carnian-Norian）石灰石，砂岩和Wotar形成的粘土岩，与风暴影响的海洋环境中的沉积环境。 2）早期到侏罗纪（Hettangian-Bajocian）砂岩和塞鲁形成的粘土岩，被潮湿的海洋环境沉积。 3）早期白垩纪（Berriasian-Barremian）红色和棕色粘土砂石和氨砂石的形成，沉积在开放式潮汐平面设置，4）早期至晚期白垩纪（Aptian-Santonian）砂岩的UNGAR地层沉积物沉积在一个开放式海岸波导的沉积环境中。在研究区内未发现最上部侏罗纪露头。该时间间隔可能由泥块阵列的泥浆火山矩阵表示。

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