Rekontruksi Geologi Tektonik Kawasan Karst Pacitan Bagian Barat Menggunakan Model Densitas Gayaberat

Zulqaisi, Imam (2025) Rekontruksi Geologi Tektonik Kawasan Karst Pacitan Bagian Barat Menggunakan Model Densitas Gayaberat. Masters thesis, Institut Teknologi Sepuluh Nopember.

Text 6016212003-Master_Thesis.pdf - Accepted Version Restricted to Repository staff only Download (4MB)

Abstract

Penelitian dilakukan di salah satu area karst Gunung Sewu yaitu pada Kawasan karst Pacitan. Kawasan karst Pacitan memiliki keunikan dari kompleksitas kondisi geologi yang berbeda dengan kondisi geologi Kawasan Gunung Sewu pada umumnya. Kondisi yang berbeda meliputi kondisi sungai bawah permukaan yang menjadi salah satu ciri khas daerah karst. Perbedaan ini secara regional diduga karena adanya perbedaan aktivitas geologi dan kondisi tektonik daerah Pacitan. Maka dari itu, penelitian kali ini berfokus pada pemetaan dan merekontruksi geologi tektonik Kawasan karst Pacitan sebagai pembuktian perbedaan aktivitas tektonik yang terjadi pada karst Pacitan dibandingkan dengan Kawasan karst Gunung Sewu secara umum. Metode pemodelan yang digunakan adalah metode gayaberat. Metode gayaberat memanfaatkan variasi medan gravitasi untuk mendapatkan gambaran ketebalan litologi, Hasil inversi pada lintasan utara–selatan menunjukkan zona selatan didominasi lapisan karbonat yang lebih tebal, kompak, dan relatif murni dibandingkan zona utara yang tercampur material vulkanik. Lintasan barat–timur mendukung pola ini dengan menunjukkan tren densitas yang konsisten, mengindikasikan proses karstifikasi lebih optimal di bagian selatan. Analisis lanjutan menggunakan data hillshade, slope, dan sebaran densitas kelurusan mendukung interpretasi spasial struktur sesar, jalur rekahan, dan evolusi tektonik kawasan. Temuan ini diharapkan menjadi dasar pengelolaan kawasan karst Pacitan secara berkelanjutan dan berbasis data geologi yang komprehensif.
=======================================================================================================================================
The research was conducted in one of the karst areas of Gunung Sewu, namely the Pacitan karst area. The Pacitan karst area has a unique geological complexity that differs from the geological conditions of the Gunung Sewu area in general. These differences include the conditions of underground rivers, which are one of the characteristics of karst areas. These regional differences are thought to be due to differences in geological activity and tectonic conditions in the Pacitan area. Therefore, this study focuses on mapping and reconstructing the tectonic geology of the Pacitan karst area to demonstrate the differences in tectonic activity occurring in the Pacitan karst compared to the Gunung Sewu karst area in general. The modeling method used is the gravity method. The gravity method utilizes variations in the gravitational field to obtain an overview of lithological thickness. The inversion results on the north–south transect show that the southern zone is dominated by thicker, more compact, and relatively pure carbonate layers compared to the northern zone, which is mixed with volcanic material. The west–east profile supports this pattern by showing consistent density trends, indicating more optimal karstification processes in the southern part. Further analysis using hillshade, slope, and density distribution data supports the spatial interpretation of fault structures, fracture zones, and tectonic evolution in the region. These findings are expected to serve as the basis for sustainable management of the Pacitan karst area, grounded in comprehensive geological data.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Gravity, Karst, Lineament, Inversion Method, Pacitan
Subjects:	G Geography. Anthropology. Recreation > G Geography (General) > G70.217 Geospatial data G Geography. Anthropology. Recreation > GA Mathematical geography. Cartography > GA139 Digital Elevation Model (computer program) G Geography. Anthropology. Recreation > GB Physical geography > GB600 Karst conservation. Q Science > QC Physics > QC111 Density and specific gravity Q Science > QC Physics > QC179 Gravitational waves--Measurement--Statistical methods Q Science > QE Geology > QE471 Sedimentary rocks. Sedimentology Q Science > QE Geology > QE601 Geology, Structural Q Science > QE Geology > QE604 Deformation
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Geomatics Engineering > 29101-(S2) Master Thesis
Depositing User:	Imam Zulqaisi
Date Deposited:	05 Aug 2025 12:42
Last Modified:	05 Aug 2025 12:46
URI:	http://repository.its.ac.id/id/eprint/127619

Actions (login required)

View Item