Electronic Theses and Dissertation

Daerah penelitian merupakan zona jajaran barisan keberadaanya pada zona tersebut menjadi hal yang menarik untuk dilakukan penelitian dalam provenance untuk memahami kondisi geologi dan asal-usul batuan sedimen di wilayah kecamatan jantho makmur, kabupaten aceh besar, provinsi aceh. kegiatan pemetaan geologi dan analisis provenance batupasir dilakukan pada daerah jantho, kabupaten aceh besar. penelitian ini bertujuan untuk mendapatkan informasi mengenai kondisi geologi daerah penelitian yang meliputi jenis litologi batuan, geomorfologi, serta melakukan analisis sayatan tipis dan sayatan poles untuk mengindentifikasi batuan asal dari batupasir pada formasi anggota padangtiji. hasil pemetaan geologi menggambarkan kompleksitas geologi didaerah penelitian. aspek geomorfologi terdiri dari unit bentuklahan asal denudasional (d2&d5), unit bentuklahan asal fluvial (f1), unit bentuklahan asal struktural (s2). tipe pola pengaliran yang teridentifikasi adalah parallel dan pinnate. litologi penyusun daerah pemetaan terdiri dari batuserpentinit, batudiorite, batulanau, batupasir, batupasir karbonatan dan endapan pasir kerikil. klasifikasi batupasir oleh pettijohn (1973) dan penentuan batuan asal (provenance) oleh dickinson dan suzeck (1975) melibatkan pengamatan petrografi dan perhitungan butir (point counting) terdapat 2 (dua) sayatan tipis batupasir dari anggota padangtiji (tuktp). hasil pengamatan petrografi batupasir mengungkapkan variasi signifikan. berdasarkan persentase komposisi mineral kuarsa (q), feldspar (f), dan litik (l), batupasir anggota padangtiji dikategorikan kedalam tipe: oc7d3 dan oc9d3 sebagai lithic wacke. analisa provenance menunjukkan bahwa sampel batupasir oc7d3 dan oc9d3 dikategorikan sebagai batuan yang berasal dari tatanan tektonik magmatic arc sub-zona transitional arc. hasil analisa xrf menunjukkan tipe batupasir oc7d3 kedalam tipe: quartzose provenance. analisa xrf terkait provenance menunjukkan bahwa sampel oc7d3 dikategorikan sebagai batuan yang berasal dari tatanan tektonik arc. kata kunci: pemetaan geologi, provenance, batupasir, sayatan tipis, padang tiji, xrf

The research area is a zone of sequences, its existence in this zone is an interesting thing to do research in provenance to understand the geological conditions and origins of sedimentary rocks in the Jantho Makmur District, Aceh Besar Regency, Aceh Province. Geological mapping and sandstone provenance analysis activities were carried out in the Jantho area, Aceh Besar Regency. This study aims to obtain information about the geological conditions of the research area which include the type of rock lithology, geomorphology, and conduct thin section and polish section analysis to identify the source rock of the sandstone in the Padangtiji Member Formation. The results of geological mapping illustrate the complexity of geology in the research area. The geomorphological aspect consists of Denudational Origin Landform Units (D2 & D5), Fluvial Origin Landform Units (F1), Structural Origin Landform Units (S2). The types of drainage patterns identified are parallel and pinnate. The lithology of the mapping area consists of serpentinite, diorite, siltstone, sandstone, carbonate sandstone and gravel sand deposits. The classification of sandstones by Pettijohn (1973) and the determination of provenance by Dickinson and Suzeck (1975) involved petrographic observations and point counting of two thin sections of sandstone from the Padangtiji Member (Tuktp). The results of the petrographic observations of the sandstones revealed significant variations. Based on the percentage composition of quartz (Q), feldspar (F), and lithic (L) minerals, the Padangtiji Member sandstones are categorized into types: OC7D3 and OC9D3 as lithic wacke. Provenance analysis shows that the OC7D3 and OC9D3 sandstone samples are categorized as rocks originating from the magmatic arc sub-zone transitional arc tectonic setting. The results of the XRF analysis indicate that the OC7D3 sandstone type belongs to the type: Quartzose provenance. XRF analysis related to provenance shows that the OC7D3 sample is categorized as rocks originating from the arc tectonic setting. Keywords: Geological Mapping, provenance, Sandstone, Thin Section, Padang Tiji, XRF