Electronic Theses and Dissertation

ABSTRAK
Secara administratif lokasi penelitian berada pada daerah Kecamatan Mane dan Geumpang, Kabupaten Pidie, Provinsi Aceh. Secara geografis berada pada 95° 55' 43.5" - 95° 58' 57.6" E dan 5° 0' 1.2" - 4° 56' 23.9" N dengan cakupan area sekitar 25 km2. Pemilihan lokasi penelitian dikarenakan pada Kecamatan Geumpang dan Mane memiliki susunan litologi batuan metamorf dan batuan beku-menengah, daerah penelitian termasuk ke dalam peta geologi regional lembar Takengon oleh Cameroon et al.(1983), yang terdiri dari formasi Geumpang yang terletak di lembar takengon merupakan salah satu daerah dengan potensi geologi yang kompleks karena pengaruh tektonik aktif, keragaman litologi, dan dinamika geomorfologi. Penelitian ini bertujuan untuk menilai kondisi geologi permukaan, menganalisis klasifikasi batuan metamorf berdasarkan kajian petrologi dan petrografi. Masalah utama yang dipelajari mencakup karakteristik geologi regional, pengenalan jenis batuan metamorf berdasarkan komposisi mineral, serta interpretasi asal-usul. Metode yang digunakan meliputi pemetaan geologi permukaan, analisis geomorfologi untuk mengidentifikasi unit bentuk lahan, dan analisis laboratorium petrografi untuk mengamati tekstur dan mineralogi batuan. Hasil analisis menunjukan bahwa wilayah unit terbagi menjadi lima unit lanskap, termasuk unit badan sungai(F1), unit bentuk lahan dataran banjir(F3), unit bentuk lahan tanggul fluvial, tanggul aliran sungai dan zona pointbar(F4), unit bentuk lahan dataran dan unit topografi yang sangat bergelombang hingga berbukit(S3). Litologi berdasarkan stratigrafi tua hingga muda terdiri dari andesit geumpang serpentinit geumpang dan sedimen aluvium. Sesar yang mengarah berat laut – tenggara berdasarkan analisis kejadian sesar dari system fault sumatra (SFS) merupakan elemen struktur utama yang mempengaruhi pola distribusi batuan dan deformasi regional. Hasil petrografi menunjukan bahwa batuan metamorf menunjukan bahwa batuan metamorf tergolong tipe serpentinit dengan komposisi serpentine dan spinel.
Kata Kunci : Petrografi, Pemetaan geologi, Batuan Metamorf Formasi Geumpang (Mug)

ABSTRACT Administratively, the research location is located in the Mane and Geumpang Districts, Pidie Regency, Aceh Province. Geographically it is located at 95° 55' 43.5" - 95° 58' 57.6" E and 5° 0' 1.2" - 4° 56' 23.9" N with an area coverage of about 25 km2. The selection of the research location is because Geumpang and Mane Districts have a lithological arrangement of metamorphic rocks and igneous-intermediate rocks, the research area is included in the regional geological map of the Takengon sheet by Cameroon et al. ( 1983), which consists of the Geumpang formation located in the Takengon Sheet is one of the areas with complex geological potential due to active tectonic influences, lithological diversity, and geomorphological dynamics. This study aims to assess the geological conditions of the surface, analyze the classification of metamorphic rocks based on petrological and petrography studies. The main problems studied include regional geological characteristics, identification of metamorphic rock types based on mineral composition, and interpretation of origin. The methods used include surface geological mapping, geomorphological analysis to identify landform units, and petrographic laboratory analysis to observe rock texture and mineralogy. The results of the analysis showed that the unit area was divided into five landscape units, including river body units (F1), floodplain landform units (F3), fluvial embankment land form units, river flow embankments and pointbar zones (F4), plain land form units and highly undulating to hilly topographic units (S3). Lithology based on old to young stratigraphy consisted of geumpang serpentinite andesites and alluvial sediments. The fault that leads to the weight of the sea-southeast based on the analysis of fault occurrence from the Sumatra fault system (SFS) is the main structural element that affects the distribution pattern of rocks and regional deformation. Petrographic results show that metamorphic rocks show that metamorphic rocks are classified as serpentinite types with serpentine and spinel compositions. Keywords: Petrography, Geological mapping, Metamorphic rocks Geumpang Formation (Mug)