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All Journal Prosiding Seminar Teknologi Kebumian dan Kelautan (SEMITAN Journal of Earth and Marine Technology (JEMT)
Syahid, Alwi
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Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Energy Physics Transportation

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PEMANFAATAN LAHAN BEKAS TAMBANG PT. POLOWIJO GOSARI SEBAGAI GEO WISATA KARST KAB. GRESIK, PROVINSI JAWA TIMUR Wardhana, Alexander Tantra; Syahid, Alwi; Rizalzi, Dewa; Kartiko, Frananda Rizki; Lestari, Intan; tekmauk, Jitro valerius; Grasella, Lucintania; Nurul, Ramdan; Kastera, Viven; Sari, Avellyn Shintya
Prosiding Seminar Teknologi Kebumian dan Kelautan Vol 2, No 1 (2020)
Publisher : Prosiding Seminar Teknologi Kebumian dan Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (558.433 KB)

Abstract

Kabupaten Gresik Jawa Timur merupakan suatu wilayah yang dikenal akan sumber material industri, tepatnya batu gamping/kapur. Hal tersebut melatar belakangi adanya beberapa tambang gamping/kapur diwilayah tersebut. Misalnya tambang PT. Polowijo Gosari yang berada di desa Sekapuk, Ujungpapah Gresik. Jika bicara tentang tambang sudah pasti tidak asing lagi dengan istilah reklamasi. Reklamasi sendiri adalah usaha pelestarian kembali suatu lahan bekas tambang agar dapat dimanfaatkan lagi sehingga tidak terbengkalai dan menjadi sumber pencemaran. Setelah beberapa tahun beroprasi, PT. Polowijo Gosari akhirnya sampai pada batas waktu penambangan dan memulai penutupan lahan tambangnya yang selanjutnya akan dilakukan reklamasi pada lahan bekas tambang tersebut. Menariknya lahan bekas tambang PT. Polowijo Gosari ini direklamasi menjadi suatu objek wisata bertajuk geo wisata karst yang bernilai edukasi dan cocok untuk kalangan remaja.
Triangulation Method for Limestone Estimation in CV. Atang Village, Jemparing: Insights from Long Ikis, Paser District, East Kalimantan Syahid, Alwi; Fanani, Yazid; Cahyono, Yudho Dwi Galih
Journal of Earth and Marine Technology (JEMT) Vol 4, No 1 (2023)
Publisher : Lembaga Penelititan dan Pengabdian kepada Masyarakat - Institut Teknologi Adhi Tama Suraba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jemt.2023.v4i1.4822

Abstract

The Atang Are Abadi Firm is a limestone mining company that has carried out further exploration activities to determine the volume, density, and continuity of grades in the exploration area. The exploration activities conducted core drilling at 17 drilling points, a distance of less than 250 meters, and an area of 19.36 ha. This research determined the geological domain of limestone layers with parameters of CaO content greater than 53% through a triangulation (triangle) method. Meanwhile, the cut-and-fill method was used for resource and reserve calculations. The resource acquisition in limestone layers with a content of more than 53% reached 25,682,831.9 BCM, and the acquisition of reserves in limestone layers with a content of more than 53% had 6,788,073.56 BCM. The estimation results of limestone resources and reserves obtained based on the Indonesian National Standard 4726: 2019 are included in the classification of measured limestone resources and proven limestone reserves.
Co-Authors Fanani, Yazid Grasella, Lucintania Intan Lestari Kartiko, Frananda Rizki Kastera, Viven Nurul, Ramdan Rizalzi, Dewa Sari, Avellyn Shintya tekmauk, Jitro valerius Wardhana, Alexander Tantra