POLA STRUKTUR DAERAH LEBAKPEUYDEUY DAN SEKITARNYA, KABUPATEN LEBAK, BANTEN

Abstract

ABSTRAK: Studi terhadap kelurusan dan pola struktur telah dilakukan didaerah Lebakpeudeuy, Kabupaten Lebak, Banten secara tektonik terletak di Blok Banten Selatan yang merupakan Blok Tinggian Bayah. Akibat dari Kolisi dua lempeng yaitu Lempeng Eurasian dan Lempeng Indo-Australia pada Kapur awal meyebabkan daerah telitian sangat kompleks. Metode dalam studi ini menggunakan geomatika berbasis Digital Elevation Model Nasional (DEMNas) yang diolah menggunakan software ArcGis dan software PCI-Geomatika untuk mengetahui arah kelurusan terhadap pola struktur yang berkembang didaerah studi. Hasil dari observasi lapangan dan analisa DEMNas disinkronisasi untuk mendapatkan pola struktur dan arah gaya utama. Berdasarkan hasil dari ekstraksi kelurusan didapatkan pola umum Utara- Selatan. Observasi lapangan hanya ditemukan sesar naik dan sesar mendatar yang memiliki arah Barat-Timur dengan arah gaya Utara-Selatan.

Kata Kunci: geomatika, DEMNas, pola struktur, gaya utama

ABSTRACT: A research on lineament and structural patterns was conducted in Lebakpeudeuy, Lebak Sub-district, Banten. Tectonically the study area is located in South Banten Block which is part of the Bayah High Block. The research site is quite complex. Geologically, this is due to the collision of the Eurasian Plate with the Indo-Australian Plate during the early Cretaceous period. The method in this research used Digital Elevation Model National (DEMNas) based on geomatics which are processed through the ArcGis software and PCI-Geomatics software by means to understand on the direction of lineament towards the structural patterns which developed at the research site. The results of the field investigation and DEMNas analyses are synchronized in order to obtain the structural pattern and main lineament direction. Based on the results of the lineament extraction the lineaments obtained are generally North-South. The results of the field observation showed reverse faults and strike slip faults which have West-East directions with a North-South direction of force.

Keywords: Geomatica, DEMNas, structural patterns, main force