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Metamorphic rock-hosted orogenic gold deposit style at Bombana (Southeast Sulawesi) and Buru Island (Maluku): Their key features and significances for gold exploration in Eastern Indonesia Arifudin Idrus; Sukamandaru Prihatmoko; Ernowo Harjanto; Franz Michael Meyer; Irzal Nur; Wahyu Widodo; Lia Novelia Agung
Journal of Geoscience, Engineering, Environment, and Technology Vol. 2 No. 2 (2017): JGEET Vol 02 No 02 : June (2017)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1215.235 KB) | DOI: 10.24273/jgeet.2017.2.2.291

Abstract

In Indonesia, gold is commonly mined from epithermal-, porphyry-, and skarn-type deposits that are commonly found in volcanic belts along island arcs or active continental margin settings. Numerous gold prospects, however, were recently discovered in association with metamorphic rocks. This paper focuses on metamorphic rock-hosted gold mineralization in Eastern Indonesia, in particular the Bombana (SE Sulawesi) and Buru Island (Maluku) prospects. At Bombana, gold-bearing quartz-veins are hosted by the Pompangeo metamorphic complex. Sheared, segmented veins vary in thickness from 2 cm to 2 m. Gold is mainly present in the form of ‘free gold’ among silicate minerals and closely related to cinnabar, stibnite, tripuhyite, and in places, minor arsenopyrite. The gold distribution is erratic, however, ranging from below detection limit up to 134 g/t. At least three generations of veins are identified. The first is parallel to the foliation, the second crosscuts the first generation of veins as well as the foliation, and the late-stage laminated deformed quartz-calcite vein represents the third mineralization stage. The early veins are mostly massive to crystalline, occasionally brecciated, and sigmoidal, whereas the second-stage veins are narrower than the first ones and less subjected to brecciation. Gold grades in the second- and third-stage veins are on average higher than that in the earlier veins. Microthermometric and Raman spectrometric studies of fluid inclusions indicate abundant H2O-NaCl and minor H2O-NaCl-CO2 fluids. Homogenization temperatures and salinities vary from 114 to 283 ºC and 0.35 to 9.08 wt.% NaCl eq., respectively. Crush-leach analysis of fluid inclusions suggests that the halogen fluid chemistry is not identical to sea water, magmatic or epithermal related fluids, but tends to be similar to fluids in mesothermal-type gold deposits. In Buru Island (Gunung Botak and Gogorea prospects), two distinct generations of quartz veins are identified. Early quartz veins are segmented, sigmoidal discontinuous and parallel to the foliation of the host rock. This generation of quartz veins is characterized by crystalline relatively clear quartz, and weakly mineralized with low sulfide and gold contents. The second type of quartz veins occurs within the ‘mineralized zone’ of about 100 m in width and ~1,000 m in length. Gold mineralization is intensely overprinted by argillic alteration. The mineralization-alteration zone is probably parallel to the mica schist foliation and strongly controlled by N-S or NE-SW-trending structures. Gold-bearing quartz veins are characterized by banded texture particularly following host rock foliation and sulphide banding, brecciated and rare bladed-like texture. Alteration types consist of propylitic (chlorite, calcite, sericite), argillic and carbonation represented by graphite banding and carbon flakes. Ore mineral comprises pyrite, native gold, pyrrhotite, and arsenopyrite. Cinnabar and stibnite are present in association with gold. Ore chemistry indicates that 11 out of 15 samples yielded more than 1 g/t Au, in which 6 of them graded in excess of 3 g/t Au. All high-grade samples are composed of limonite or partly contain limonitic material. This suggests the process of supergene enrichment. Interestingly, most of the high-grade samples contain also high concentrations of As (up to 991ppm), Sb (up to 885ppm), and Hg (up to 75ppm). Fluid inclusions in both quartz vein types consist of 4 phases including L-rich, V-rich, L-V-rich and L1-L2-V (CO2)-rich phases. The mineralizing hydrothermal fluid typically is CO2-rich, of moderate temperature (300-400 ºC), and low salinity (0.36 to 0.54 wt.% NaCl eq). Based on those key features, gold mineralization in Bombana and Buru Island tends to meet the characteristics of orogenic, mesothermal types of gold deposit. Metamorphic rock-hosted gold deposits could represent the new targets for gold exploration particularly in Eastern Indonesia.
PELATIHAN DAN PENDAMPINGAN PENERAPAN AKUNTANSI MANAJEMEN PRODUK DAUR ULANG SAMPAH DI KELURAHAN SUKORAME KOTA KEDIRI Zulistiani, Zulistiani; Widodo, Moch. Wahyu; Aliami, Sri; Raharjo, Itot Bian; Shintaro, Margareta
Jurnal Abdimas Akademika Vol. 4 No. 02 (2023): Edisi Desember 2023
Publisher : Akademi Kesejahteraan Sosial AKK Yogyakarta

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Abstract

Kegiatan Pengabdian Masyarakat ini dilaksanakan di Kelurahan Sukorame Kota Kediri diikuti oleh para pengurus bank sampah di kelurahan Sukorame. Tujuan kegiatan ini yaitu tentang pemberian pelatihan dan pendampingan materi Akuntansi Manajemen ini terutama untuk materi Penentuan Harga Jual dan Break Even Point (BEP) atau perhitungan titik impas. Metode yang digunakan dalam pengabdian ini adalah ceramah, praktik, tanya jawab, diskusi, dan pendampingan. Dari hasil pengabdian ini menunjukkan bahwa peserta pengabdian 1) mampu memahami dan mempraktekkan perhitungan harga jual yang pas untuk memperoleh keuntungan setiap unit produk yang terjual 2) mampu memahami dan mempraktekkan perhitungan atau perhitungan titik impas untuk menentukan titik penjualan produk itu dalam keadaan impas sehingga para pengurus bank sampah ini mampu membuat keputusan untuk menjual produk yang diatas BEP supaya memperoleh keuntungan sesuai yang ditargetkan.
PENYULUHAN KESEHATAN FINANSIAL DI BULAN RAMADHAN DAN HARI RAYA IBU IBU DHARMA WANITA KOTA KEDIRI Zulistiani, Zulistiani; Damayanti, Susi; Paramitha, Dyah Ayu; Widodo, Moch. Wahyu; Kurniawan, Rony
Jurnal Abdimas Akademika Vol. 5 No. 01 (2024): Edisi Juni 2024
Publisher : Akademi Kesejahteraan Sosial AKK Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63864/jaa.v5i01.293

Abstract

Kegiatan Pengabdian masyarakat ini dilaksanakan di gedung Kilisuci Balai Kota Kediri dengan peserta para ibu anggota Dharma Wanita Kota Kediri. Tujuan kegian itu yaitu untuk memberikan penyuluhan tentang cara mengelola keuangan supaya tercipta kesehatan finansial terutama saat Bulan Ramadhan dan Hari Raya Idul Fitri. Metode yang digunakan adalah ceramah, praktik dan diskusi tanya jawab. Dari penyuluhan ini mmenunjukkan bahwa 1) masih banyak peserta yang tidak melakukan pengelolaan keuangan keluarga dengan baik 2) peserta memahami materi penyuluhan dengan baik dan antusias untuk memulai praktik melakukan perencanaan keuangan keluarga dengan bantuan aplikasi pencatatan keuangan.
ANALISIS FINANSIAL USAHA PEMBESARAN IKAN LELE POKDAKAN SUMBER REJEKI KABUPATEN KEDIRI Saputra, Leny Bima; Widodo, Moch. Wahyu; Meilina, Restin
Creative Research Management Journal Vol 5 No 1 (2022): June
Publisher : Universitas Prof. Dr. Hazairin SH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32663/crmj.v5i1.2706

Abstract

Sumber Rejeki Fish Cultivation Group or usually called POKDAKAN Sumber Rejeki is agroup of farmers who’s cultivating fish especially catfish in Bangkok Village, Gurah District,Kediri Regency. This group was founded in 2017 and has a purpose to embrace the villagecommunity to work together in advancing the catfish farming business owned by its members.The purpose of this study was to analyze the feasibility of cultivating catfish (Clarias sp) atPOKDAKAN Sumber Rejeki which is analized by Revenue on Costs Ratio (R/C Ratio), BreakEvent Point (BEP), and Payback Period (PP), and Switching Value. The population of thisstudy were all catfish cultivators in POKDAKAN Sumber Rejeki Bangkok village with asample of 30 respondents. The analysis technique used is Revenue on Costs Ratio (R/CRatio), Break Event Point (BEP), and Payback Period (PP), and Switching Value. Based onthe results of financial analysis using the method of calculating the R/C Ratio with anaverage value of 1.09, price BEP of Rp 13,786, volume BEP of 3818 kg, PP an average valueof 1.14. While the results of the price sensitivity analysis some members suffered losses.Broadly speaking, the POKDAKAN Sumber Rejeki catfish enlargement business is in afinancially viable, profitable, and fast return on investment condition.
SOSIALISASI DAN PENGENALAN TEKNOLOGI KEUANGAN DIGITAL Zulistiani, Zulistiani; Paramitha, Dyah Ayu; Hadi, Dodi Kusuma; Widodo, Moch. Wahyu; Raharjo, Itot Bian
Jurnal Abdimas Akademika Vol. 5 No. 02 (2024): Edisi Desember 2024
Publisher : Akademi Kesejahteraan Sosial AKK Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63864/jaa.v5i02.323

Abstract

Transformasi digital memberikan peluang besar dalam manajemen keuangan, namun literasi keuangan digital di kalangan masyarakat pedesaan, termasuk anggota PKK Desa Cerme, masih rendah. Kegiatan pengabdian masyarakat ini bertujuan untuk meningkatkan pemahaman dan adopsi teknologi keuangan digital melalui sosialisasi dan pelatihan. Metode yang digunakan meliputi penyampaian materi interaktif, simulasi penggunaan aplikasi keuangan, dan diskusi kelompok. Hasil kegiatan menunjukkan peningkatan pemahaman peserta terhadap aplikasi keuangan digital, di mana 85% peserta memahami manfaat dan penggunaannya setelah sosialisasi. Komitmen penggunaan aplikasi juga meningkat, dengan 70% peserta bersedia mencoba aplikasi keuangan dalam waktu dekat. Kendala utama seperti kurangnya konsistensi penggunaan dan kekhawatiran keamanan data berhasil diidentifikasi untuk pelatihan lanjutan. Program ini diharapkan dapat meningkatkan literasi digital dan manajemen keuangan keluarga serta menjadi model bagi desa lain. Evaluasi lanjutan diperlukan untuk menilai efektivitas program secara berkelanjutan.
KAMPUNG SEHAT: PENGUATAN PERAN MASYARAKAT DALAM PENANGGULANGAN STUNTING MELALUI EDUKASI DI KELURAHAN CAMPUREJO Leksono, Poniran Yudho; Sasongko, Muhammad Zuhdi; Raharjo, Itot Bian; Widodo, Moch. Wahyu; Sunita, Lutvi Deva; Aryani, Nur Aini Azri Dwi; Sari, Yulita Fatma; Mavira, Sherli
Jurnal Abdimas Akademika Vol. 6 No. 01 (2025): Edisi Juni 2025
Publisher : Akademi Kesejahteraan Sosial AKK Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63864/jaa.v6i01.355

Abstract

Stunting merupakan permasalahan kesehatan masyarakat yang memengaruhi kualitas sumber daya manusia jangka panjang. Penelitian ini bertujuan untuk menganalisis implementasi program pemberdayaan masyarakat dalam penanggulangan stunting melalui pendekatan edukatif di Kelurahan Campurejo, Kota Kediri. Penelitian ini menggunakan metode kualitatif deskriptif dengan teknik pengumpulan data melalui observasi partisipatif dan dokumentasi kegiatan masyarakat. Hasil menunjukkan bahwa keterlibatan aktif kader posyandu, tokoh masyarakat, dan keluarga secara signifikan berkontribusi terhadap peningkatan kesadaran gizi pada 1000 Hari Pertama Kehidupan (HPK). Selain itu, program ini juga ditunjang oleh kolaborasi multipihak antara pemerintah desa, tenaga kesehatan, dan lembaga swadaya masyarakat (LSM). Edukasi yang diberikan secara rutin berperan penting dalam mengubah perilaku dan pola konsumsi masyarakat. Kesimpulannya, model penanggulangan stunting berbasis pemberdayaan dan edukasi masyarakat berpotensi mempercepat penurunan angka stunting secara berkelanjutan.
Pengaruh Tangibility, Profitabilitas, Pertumbuhan Perusahaan, Non Debt Tax Shields, Cash Holding dan Ukuran Perusahaan terhadap Struktur Modal Perusahaan (Studi pada Perusahaan Manufaktur yang Listing di BEI Tahun 2010-2012) Widodo, Moch. Wahyu; Moeljadi; Djawahir, Achmad Helmy
Jurnal Aplikasi Manajemen Vol. 12 No. 1 (2014)
Publisher : Universitas Brawijaya, Indonesia

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Abstract

This study purposed to examine the effect of variable tangibility, profitability, growth, non-debt tax shields, cash holding and firm size on their capital structure of manufacturing company in Indonesia. The multiple regression analysis is used to analyze the data in this study. Data analysis are implied on manufacturing company which listed on Indonesia Stock Exchange in periode 2010-2012. A total of 72 companies met the criteria as population of study, all members of the population used as sample. The results of this study indicate that the increasing of tangibility will increase the company's capital structure, the high level of profit company has low levels of debt, and company size affect the size of the company's capital structure, while, there no significant effect was found between the company growth, non-debt tax shields and cash holdings to their capital structure.
Mengukur Kepuasan Masyarakat Pada Program CSR di Desa Kertajaya: Sebuah Analisis Menggunakan Metode Sustainability Compass Eko Widodo, Wahyu; Noor Cholidah, Sri; Putri Isnaeni, Anis; Tri Wibowo, Kamto; Abriandi, Erick
Jurnal Pemberdayaan Masyarakat: Media Pemikiran dan Dakwah Pembangunan Vol. 3 No. 1 (2019): Jurnal Pemberdayaan Masyarakat
Publisher : UIN Sunan Kalijaga, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/jpm.2019.031-02

Abstract

Kertajaya Village has a high unemployment problem. But the potential for growth is quite large because it is in the Ring I area of PT. Pertamina (Persero) TBBM Bandung. Correct if the CSR program called Kertajaya Creative Destination becomes a priority agenda. CSR programs must run well. Laterally with the main objectives of the Sustainability Development Goals (SDGs). This paper also describes the CSR program that has been consecutively in Kertajaya Village. The steps taken in unraveling the success of CSR programs through the analysis of the community satisfaction index. This paper finds that CSR programs that are running are considered positive by the community. Showed by the survey conducted for 18 beneficiaries had a final score of 3.48. This assessment is included in the “very good” category. This valuation is applied to 8 programs that have been successively, including the bag craftsmen group, the Eco-Blinder artisans group, West Bandung creative economy forum, Balai Seni Barli (BSB) tourism, Kertajaya youth clubs (karang taruna), Kertajaya culinary producers, Turban groups, and Masebajaya groups. After being analyzed using the sustainability compass method, there are two groups that need to be improved by the program, namely the Turban and Masebajaya groups. The sustainability compass method is used as an offer to stakeholders to follow up on the input generated from this paper. The main schemes studied are nature, economy, society, and well-being. As a dealectically, the main purpose of this paper is not as a discourse but rather a blue print of policy changes.Desa Kertajaya memiliki masalah pengangguran cukup tinggi. Namun potensi untuk berkembang cukup besar karena ada di wilayah Ring I PT. Pertamina (Persero) TBBM Bandung. Tepat jika program CSR bernama Kertajaya Creative Destination menjadi agenda prioritas. Program CSR harus berjalan dengan baik. Seiring dengan tujuan utama sasaran Sustainability Development Goals (SDGs). Paper ini juga mengurai program CSR yang sudah berjalan di Desa Kertajaya. Langkah yang ditempuh dalam mengurai keberhasilan program CSR melalui analisis indeks kepuasan masyarakat. Tulisan ini menemukan program CSR yang berjalan dinilai positif oleh masyarakat. Terbukti dengan survei yang dilakukan kepada 18 orang penerima manfaat memiliki skor akhir 3.48. Nilai ini masuk ke dalam kategori “sangat baik”. Penilaian ini diberlakukan kepada 8 program yang sudah berjalan, antara lain kelompok pengrajin tas, kelompok pengrajin Eco-Blinder, forum ekonomi kreatif Bandung Barat, wisata Balai Seni Barli (BSB), karang taruna Kertajaya, Produsen kuliner Kertajaya, kelompok Turban, dan kelompok Masebajaya. Setelah dianalisis menggunakan metode sustainability compass, ada dua kelompok yang perlu ditingkatkan program, yaitu kelompok Turban dan Masebajaya. Metode sustainability compass digunakan sebagai tawaran kepada stakeholder untuk menindaklanjuti masukan yang dihasilkan dari tulisan ini. Dengan skema utama yang dikaji adalah nature, economy, society, dan well-being. Secara dealektis, tujuan utama paper ini bukan sebagai diskursus tapi lebih tepat menjadi catatan blue print perubahan kebijakan.