AbstrakDaerah Sangon, Kokap, Kulon Progo, Daerah Istimewa Yogyakarta tersusun dari Formasi Andesit Tua. Vulkanisme Pegunungan Kulon Progo telah mengendapkan mineral logam, salah satunya di daerah Sangon. Penelitian bertujuan untuk mengetahui tipe alterasi, tipe mineralisasi, serta hubungan pola sebaran urat kuarsa dengan tipe alterasi dan tipe mineralisasi. Penelitian dilakukan pada kavling seluas 2 x 2 km 2 dengan melakukan pemetaan geologi dan analisis laboratorium. Observasi lapangan mencakup pengambilan data struktur dan batuan. Analisis laboratorium yang dilakukan antara lain analisis petrografi, mineragrafi, dan XRD untuk mengetahui mineral primer, sekunder, dan logam. Hasil analisis menunjukkan bahwa stratigrafi daerah penelitian termasuk ke dalam Formasi Andesit Tua berupa batuan lava andesit dan andesit porfir. Struktur geologi yang berkembang berupa sesar geser yang mempengaruhi mineralisasi logam. Pada bagian utara daerah penelitian mempunyai dimensi urat relatif kecil, tipe alterasi lanjut argilik dan inner propilitik, mineral logam emas, pirit, kalkopirit, arsenopirit, sfalerit dengan suhu yang rendah 50 o C -120 o C. Di bagian tengah daerah penelitian mempunyai dimensi urat relatif besar, tipe alterasi propilitik, mineral logam pirit, kalkopirit dengan suhu yang rendah 200 o C -340 o C. Kavling bagian selatan mempunyai dimensi urat relatif kecil, tipe alterasi filik, mineral logam pirit, kalkopirit dengan suhu yang rendah 280 o C -400 o C. Dengan demikian, dapat disimpulkan bahwa Daerah Sangon adalah lokasi endapan epitermal sulfida rendah.Kata Kunci : Sangon, Formasi Andesit Tua, epitermal sulfida rendah. Abstract Sangon area, Kokap, Kulon Progo, Special Region Yogyakarta consist of the Old Andesite Formation. Kulon Progo Tertiary Volcanic deposited metal minerals, one of them is in the Sangon area. The aim of this research is to know the type of alteration, mineralization, and the relation of the pattern of quartz vein distribution with the type of alteration and the type of mineralization.The study was conducted on a 2 x 2 km 2 area by conducting field observation and laboratory analysis. Field observation includes data collection of structures and rocks. Laboratory analysis included petrography analysis, mineragraphy, and XRD to know primary, secondary, and metal minerals. The results of the analysis indicate that the stratigraphy of the study area consist of lava rocks and porous andesite as part of the Old Andesite Formation. The geological structure that developed within the area is a branch shear fault that affects metal mineralization. The northern plots have relatively small urate dimensions, advanced argillic alteration and inner propylitic type, gold metal minerals, pyrite, chalcopyrite, arsenopyrite, sphalerite with low temperature 50oC -120oC. The middle plot has a relatively large urate dimension, type of propylitic alteration, pyrite metal minerals, chalcopyrite with a low temperature of 200oC -340oC. The southern portion has relatively small urate dimensions, type of phyllic alterat...
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.