Sains Malaysiana 32: 1-12 (2003)                                                                                                  Sains Bumi /

Earth Science

 

Hubungan Emas dengan Unsur Penyerta di Kawasan Lombong Penjom,

Pahang dan Lombong Lubuk Mandi,Terengganu

(Relationship between gold and associated elements at gold mines in

Penjom, Pahang and Lubuk Mandi, Terengganu)

 

 

Wan Fuad Wan Hassan

Program Geologi

Fakulti Sains dan Teknologi

Universiti Kebangsaan Malaysia

43600 UKM Bangi, Selangor D.E. Malaysia

 

Heru Sigit Purwanto

Jurusan Geologi

Universitas Pembangunan Nasional

Yogakarta, Indonesia

 

 

ABSTRAK

 

Kewujudan emas dan hubungannya dengan unsur penyerta dari lombong emas Penjom di Jalur Tengah dan lombong emas Lubuk Mandi di Jalur Timur telah dikaji. Sebanyak 41 sampel terdiri daripada kuarza telerang, batuan dinding, batuan rejahan dan bijih dari Penjom dan 30 sampel yang serupa dari Lubuk Mandi telah diana lis is menggunakan kaedah spektroskopi serapan atom (AAS). Data geokimia daripada hasil analisis ini diolah secara statistik. Beberapa sampel irisan gilap mineral bijih dari kedua-dua kawasan juga telah dianalisis secara mikroskopi bijih dan analisis elektron mikroprob (EPMA) bagi menyokong data geokimia. Berdasarkan data geokimia hasil analisis korelasi statistik menunjukkan bahawa di kawasan lombong Penjom emas (Au) mempunyai hubungan saling menentu atau korelasi positif dengan dengan Cu-Ag-Pb dan hubungan terbalik atau korelasi negatif dengan Zn-­As. Di kawasan lombong Lubuk Mandi pula Au berhubungan kuat secara korelasi positif dengan Cu manakala Ag-Pb-Zn-As mempunyai hubungan terbalik atau berkorelasi negatif dengan Au. Berdasarkan hubungan emas dengan unsur-unsur penyerta yang dianalisis dapat ditafsirkan bahawa kawasan lombong Penjom merupakan longgokan emas jenis Au-Cu-Ag-Pb manakala kawasan lombong Lubuk Mandi pula merupakan longgokan emas jenis Au-Cu.

 

 

ABSTRACT

 

The occurrence of gold and its relationship to the associated elements for Penjom gold mine in the Central Belt and Lubuk Mandi gold mine in the Eastern Belt has been studied. Forty one samples from Penjom and thirty samples from Lubuk Mandi, consisting of vein-quartz, intrusives, wall rocks and ore samples were analysed by atomic absorption spectroscopy (AAS), and the geochemical data obtained were analysed statistically for the elemental relationships. Polished sections of some ore samples were studied under an ore microscope and an electron probe microanalyser (EPMA) to augment the geochemical data.  Based on the statistical analyses, gold (Au) in Penjom has a positive correlationship with Cu-Ag-Pb and a negative correlationship with Zn-As. In Lubuk Mandi, Au has a positive correlationship with Cu and a negative correlationships with Ag-Pb-As.  Based on the elemental relationships, the Penjom gold deposit can be classified as an Au-Cu-Ag-Pb deposit while the Lubuk Mandi gold deposit as a Au-Cu deposit.

 

 

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