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- W2183953076 abstract "The complex of Gunung Badak is located in the Ciletuh Bay, Sukabumi, West Java. This complex is the only pre-Tertiary rock exposed known as melange complex in West Java. The complex consists of ophiolite (peridotite, gabbro, and pillowed basalt), metamorphic (serpentinite, quartzite, phyllite, and schist), and sedimentary rocks (greywacke, nummulite limestone, black shale, red clay and polymic breccias) that underlined the early Tertiary sediments of Ciletuh Formation. These rocks are tectonically mixed as a result of subduction between Eurasia and Indo-Australian Plate in southern Jawa Island. Peridotites are exposed in scattered outcrops in northern and central part of the Gunung Badak. This rock is characterized by its greenish color, mainly of olivine, augite, diopside and basic plagioclase. The peridotites in some places became serpentine. The gabbros are well exposed as dikes in the Aseupan Hill and southern part of Gunung Badak. Petrographically, Gabbro shows phaneritic~porphyritic textures, mostly of hyperstein, labradorite and rarely olivine, magnetite and hematite. The Pillowed basaltic-spilitic lavas are cropped out in the northern part of Gunung Badak. It characterized by it dark color, pillow structure, porphyritic, and vesicular textures. These rocks composed mainly of pyroxene, and felsic plagioclase. Metamorphic rocks that exposed in eastern flank of Gunung Badak, consist of serpentinite. Phylite, schist and quartzite are occurred as fragment of polymic breccias that well exposed in the southern flank of Gunung Badak. The sedimentary rocks of the complex are composed of greywacke in Mandra Island, limestone and polymic breccias in Manuk, Kunti islands and NS of the area. Geomorphologically, the area shows amphitheatre structure that open to the Indian Ocean, and Jampang Formation hill at the back. The area is very important to be preserve as “Geology of nature preserves” due to its rare and important geology cropped out at the area. The lineation of the nature preserves boarder is made based on the occurrences of the Pre-Tertiary outcrop. Furthermore the area can be used as a geology laboratory for whom that interest for study the evolution of the ophiolite groups in related to the subduction zone in southern Java and the occurrences of melange complex in the Gunung Badak. More over in the development and promote of the area, its can be used as a geotourism object in West Java, which can increase the local government income, but good management should be applied to maintained and protect the geology nature preserves from an exploitation of its rocks." @default.
- W2183953076 created "2016-06-24" @default.
- W2183953076 creator A5009828375 @default.
- W2183953076 date "2007-01-01" @default.
- W2183953076 modified "2023-09-27" @default.
- W2183953076 title "CHARACTERISTICS OF PRE-TERTIARY MELANGE AS DECISIVE FACTOR FOR GEOLOGY NATURE CONSERVANCY OF GUNUNG BADAK," @default.
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