The Occurences of Heavy Mineral Placer at Kendawangan and Its Surrounding, West Kalimantan Province

Abstract

The main objective of this study is to identify and to determine the variation and content of heavy mineral placer of Kendawangan coastal, offshore and its surrounding area. Sediment samples were taken from 18 locations, such as 12 samples from offshore and 6 samples from coastal area. For this analysis the heavy metals were identified and analyzed using isodynamic separator and binocular microscopic. The result indicates that heavy minerals consist of zircon, cassiterite, rutile, ilmenite, topaz, chalcopyrite, epidote, pyrite, hematite, hornblende and magnetite. Cassiterite and zircon are also found in sediment samples in all locations and potentially to be further developed. Keywords: Heavy minerals placer, Zircon, Cassiterite, Kendawangan, West Kalimantan Tujuan penelitian ini adalah untuk mengidentifikasi dan menentukan variasi kandungan mineral berat plaser pada sedimen pantai dan lepas pantai Kendawangan dan sekitarnya. Sampel sedimen diambil dari 18 lokasi yang terdiri atas 12 sampel sedimen lepas pantai dan 6 sampel sedimen pantai. Analisis dilakukan dengan menggunakan isodinamik separator dan mikroskop binokular. Hasil analisis menunjukkan bahwa mineral berat terdiri atas zircon, kasiterit, rutil, ilmenit, topas, kalkopirit, epidot, pirit, hematit, hornblende, dan magnetit. Kasiterit dan zircon juga dijumpai pada sampel sedimen di semua lokasi yang dianalisis dan berpotensi untuk dikembangkan lebih lanjut. Kata kunci: Mineral berat plaser, Zirkon, Kasiterit, Kendawangan, Kalimantan Barat

Dynamothermal Metamorphic Sebagai Provenance Endapan Sedimen Daerah Aliran Sungai Kaligarang Semarang Berdasarkan Analisis Mineral Berat

“…Sehingga persentase mineral yang dihitung antara 20%-30%. Dalam hal ini nilai p + simpangan baku yang diambil, sehingga p terkoreksi 30% (Rohendi dan Aryanto, 2016;Setyanto dan Surachman, 2017) bahan seperti separation funnel, tabung erlenmeyer, corong gelas, kertas saring, pengaduk gelas, timbangan, oven, mikroskop binokuler, jarum, olate, air, sampel sedimen, dan larutan bromoform. Langkah-langkah analisis mineral berat adalah sebagai berikut: sampel sedimen dibersihkan menggunakan air untuk menghilangkan partikelpartikel berukuran sangat halus dan pengotor.…”

Application of Induced Polarization and Resistivity Methods to Identify Subsurface Layers in Bauxite Deposits Area of Kendawangan, West Kalimantan

“…Indonesia has bauxite reserves to rank the 8 th largest in the world (Haryadi, 2016). Kendawangan Sub-district, Ketapang Regency is one of the areas in West Kalimantan Province that can contain minerals of economic value, including bauxite deposits, iron ore (Andriansyah, 2019), heavy minerals both of zircon and cassiterite (Setyanto & Surachman, 2017), and radioactive minerals (Subiantoro, Soetopo and Haryanto, 2012). In West Kalimantan, bauxite is found in a distribution line with a length of 300 km and a width of 50-100 km (laterite zone), which stretches northwest to southeast from Ketapang Regency, Sanggau, Landak, Kubu Raya, Pontianak, Bengkayang, and Singkawang (Toreno & Moe'tamar, 2012).…”