The ore mineralization characteristics of Na Luong area, Kham district, Xieng Khoang province, Laos PDR

Abstract
Na Luong area, Kham District, XiengKhoang province, Lao PDR has a complex geological structure. The exploration results of Indochina Mining Joint Venture Company (IMC) have determined that in the area of Phou Bo mountain, Na Luong village, Kham District, XiengKhoang region. There are 2 iron orebodies (TQ.1, TQ.2), 3 copper orebodies (TQ.3, TQ.5, TQ.5) and a potential ore outcrops (HT.10-3, HT.10-9).
The analysis results show that the Fe content varies -from28.5% to 58.7%. The ore-bearing rocks and the adjoining rocks are gray skarns having a solid structure with the mineral composition is mainly pyroxene and garnet.
Copper ore bodies’bedding is inclined to the Westwith dip angle from 55o to 85o, the thickness from 0.7m to 20.59m. Coppercontent from 0.14% to 5.59%. The ore-bearing rocks and adjoining rocks are gray metamorphic (skarn) rock with massive structure, granulose, panidiomorphic and grain textures. The mineral composition ismainlygarnet and pyroxene.
This article introduces the results of geological and mineral survey in the area of Na Luong village, Kham district, XiengKhouang province, Laos PDR of IMC. The exploration for iron ore and copper ore was conducted by Northwest Geological Division. In this projetc, the author is a supervisor of the IMC Company.
Keywords: Copper ore, iron orebody, fault, skarn, Na Luong, XiengKhoang.

摘要
老挝人民民主共和国川圹省甘县那娘地区地质构造复杂。印度支那矿业合资公司（IMC）的勘探成果证实，在川圹省甘县那娘村普波山区域内，共圈定2处铁矿体（TQ.1、TQ.2）、3处铜矿体（TQ.3、TQ.5、TQ.5）以及1处潜在矿石露头（HT.10-3、HT.10-9）。

分析测试结果表明，铁矿石全铁含量介于28.5%至58.7%之间。赋矿围岩与邻接岩石均为灰色夕卡岩（skarn），具块状构造，矿物组成以辉石（pyroxene）和石榴子石（garnet）为主。

铜矿体的层理倾向西，倾角介于55°至85°之间，厚度为0.7m至20.59m，铜含量介于0.14%至5.59%之间。赋矿围岩与邻接岩石均为灰色变质（夕卡岩）岩，具块状构造，结构为粒状、自形晶及晶粒结构，矿物组成以石榴子石和辉石为主。

本文介绍了印度支那矿业合资公司（IMC）在老挝人民民主共和国川圹省甘县那娘地区开展的地质与矿物调查成果，该铁、铜矿勘探工作由西北地质分局承担，本次项目中笔者担任IMC公司的项目主管。

关键词：铜矿、铁矿体、断层、夕卡岩、那娘、川圹