Electronic Theses and Dissertation

Peningkatan pembangunan infrastruktur nasional mendorong kebutuhan semen yang semakin besar, sehingga diperlukan ketersediaan bahan baku batugamping dengan kualitas yang memenuhi standar industri. kabupaten aceh jaya diketahui memiliki potensi batugamping, khususnya pada formasi batugamping teunom, namun kajian terintegrasi mengenai kondisi geologi, geomorfologi, dan kualitas geokimianya masih terbatas. penelitian ini bertujuan untuk mengkaji kondisi geologi dan geomorfologi daerah penelitian serta mengevaluasi potensi batugamping teunom sebagai bahan baku industri semen di desa seumantok, kecamatan sampoiniet, kabupaten aceh jaya, provinsi aceh. metode penelitian meliputi pemetaan geologi dan geomorfologi lapangan, analisis struktur geologi, analisis petrografi sayatan tipis, serta analisis geokimia menggunakan metode x-ray fluorescence (xrf). hasil penelitian menunjukkan bahwa daerah penelitian tersusun atas empat satuan batuan utama, yaitu satuan meta-batulanau woyla (muwms), satuan batugamping teunom (mutlr), satuan diorit sikuleh (miskd), dan satuan endapan aluvium (qh). struktur geologi dicirikan oleh kekar non-vein dan kekar vein dengan orientasi tegasan utama ne–sw, yang mengindikasikan lebih dari satu tahap deformasi serta pengaruh aktivitas hidrotermal. berdasarkan klasifikasi geomorfologi van zuidam (1983), daerah penelitian tersusun atas beberapa satuan geomorfologi utama yang meliputi bentang alam karst, perbukitan dan lereng karst denudasional (k3), lembah kering (dry valley) (k11), satuan denudasional dengan tingkat erosi sedang hingga parah (d2), serta satuan fluvial berupa tubuh sungai (f1) dan teras fluvial (f6). keberadaan satuan-satuan geomorfologi tersebut mencerminkan dominasi proses pelarutan karst, denudasi, dan aktivitas fluvial. analisis petrografi menunjukkan litofasies mudstone (tf 01) dan crystalline carbonate (tf 05) berdasarkan klasifikasi dunham (1962), yang mencerminkan lingkungan pengendapan berenergi rendah pada zona back reef–lagoon menurut tucker dan wright (1990) serta termasuk fasies 8 (platform interior restricted) menurut flügel (2004). analisis xrf menunjukkan kadar cao sebesar 99,53% dan 99,25% dengan mgo 0%, sehingga tergolong pure limestone (todd, 1966) dan memenuhi standar sni-15-2049-2004 serta kriteria bahan baku semen pt. semen padang dan pt. solusi bangun andalas. batugamping formasi teunom berpotensi sangat baik sebagai bahan baku industri semen.

The increasing development of national infrastructure has led to a growing demand for cement, which in turn requires a reliable supply of high-quality limestone as raw material. Aceh Jaya Regency is known to have significant limestone potential, particularly within the Teunom Limestone Formation; however, integrated studies on its geological, geomorphological, and geochemical characteristics remain limited. This study aims to investigate the geological and geomorphological conditions of the study area and to evaluate the potential of the Teunom Limestone as a raw material for the cement industry in Seumantok Village, Sampoiniet District, Aceh Jaya Regency, Aceh Province. The research methods include geological and geomorphological field mapping, structural geological analysis, petrographic analysis of thin sections, and geochemical analysis using X-Ray Fluorescence (XRF). The results indicate that the study area is composed of four main lithological units, namely the Woyla Metasiltstone Unit (Muwms), the Teunom Limestone Unit (Mutlr), the Sikuleh Diorite Unit (Miskd), and the Quaternary Alluvial Deposits Unit (Qh). Geological structures are characterized by non-vein and vein fractures with a dominant NE–SW principal stress orientation, indicating multiple deformation phases and the influence of hydrothermal activity. Based on the geomorphological classification of Van Zuidam (1983), the study area comprises several main geomorphological units, including karst landscapes, denudational karst hills and slopes (K3), dry valleys (K11), denudational units with moderate to severe erosion intensity (D2), and fluvial units represented by river channels (F1) and fluvial terraces (F6). These geomorphological features reflect the dominance of karst dissolution processes, denudation, and fluvial activity. Petrographic analysis indicates mudstone (TF 01) and crystalline carbonate (TF 05) lithofacies based on Dunham’s (1962) classification, reflecting low-energy depositional environments in the back reef–lagoon zone according to Tucker and Wright (1990), and corresponding to Facies 8 (Platform Interior Restricted) of Flügel (2004). XRF analysis reveals CaO contents of 99.53% and 99.25%, with MgO contents of 0%, classifying the limestone as pure limestone (Todd, 1966) and meeting the requirements of SNI-15-2049-2004 as well as the raw material standards of PT Semen Padang and PT Solusi Bangun Andalas. Therefore, the Teunom Limestone Formation exhibits excellent potential as a raw material for the cement industry.