中国铜矿资源找矿前景

Copper exploration prospects in China

从中国60年铜矿勘查程度研究入手,分析了铜矿床的产出与勘查程度的空间、强度的内在联系。统计结果表明,铜矿床的规模与勘查程度呈正相关,发现一个大型铜矿床所需要的钻探工作量为(12.5～16)×104m,发现一个中型铜矿床需要的钻探工作量至少为(4.8～5.48)×104m。面积约占中国2/3的中西部地区,铜矿的勘查程度低或极低,查明铜矿床的数量和储量仅占全国的17%和34%,西部地区还具有巨大的找矿潜力。选择勘查程度较低或极低、又具备铜矿成矿地质背景的区域作为铜矿成矿区带,在区带内利用已发现的铜矿床、矿(化)点和可能具有反映铜矿化显示的化探异常等因素圈定找矿远景区。在提高勘查程度就有可能发现更多资源储量的前提下,采用高勘查程度区铜资源储量的特征和参数,对低勘查程度区的铜资源储量进行类比预测,估算全国铜资源潜力为(5591～18483)×104t,其中西部低勘查程度区的潜在铜资源量为(5591～13660)×104t,可发现大型铜矿床30～70个。铜找矿远景区主要分布在西藏冈底斯、班公湖,西南三江,新疆东天山,内蒙古大兴安岭,中东部铜矿山深部及外围。

Based on the research of copper exploration progress in past 60 years in China, the authors analyzed the internal relation between copper exploration success and the space and density of copper exploration. Statistics indicate that the relation between the deposits scale and exploration extent is positive correlation. The drilling amount for proving up a large-scale copper deposit is （12.5-16） ×10^4m, and the drilling amount for proving up a medium-scale copper deposit is at least （4.8-5.48）×10^4m. In the vast central and western China, the copper exploration extent is relatively low, and the proven copper deposit amount and reserve account on only 17% and 34%, so the exploration potential is huge. The paper firstly selected some low extent and high potential areas as the metallogenic belts, and targeted some prospective areas in these regions by using discovered deposits and occurrences and geochemical abnormities. Compared with the characteristics and parameters of some high extent areas, the total reserve of copper in low extent areas in western China is estimated to be 5591-13660）×10^4t, and the amount of large-scale copper deposits is 30-70. These prospective areas mainly distributed in some famous metallogenic belts, such as Gandise, Bangong Lake, southwestern Three-River areas, eastern Tianshan Mountains, Greater Khingan Mountains, and some deep and peripheral parts in central and eastern China.