摘要
西藏冈底斯火山—岩浆弧带是我国重要的铜多金属成矿远景区。矿床多与该区中酸性侵入岩有密切的联系,正确评价和圈定与岩体有关的航磁异常对进一步找矿工作有着重要的意义。笔者以研究区的航磁数据为基础,利用三维成像技术对南冈底斯甲玛、驱龙两个典型矿床的控矿岩体进行了反演研究。结合前人资料,确定了这类矿床控矿岩体的两个共同航磁特征。在这个基础上,通过边缘检测和霍夫变换,结合冈底斯斑岩型矿床分布的特点,对南冈底斯斑岩型矿床进行了预测,圈定了18个找矿远景区,对进一步找矿工作有重要的意义。
The Gangdise volcanic magmatic arc is an important copper-polymetallic prospective area.The deposits are closely related to intermediate-acid igneous rocks.It is important to evaluate aeromagnetic anomalies caused by igneous rocks.This paper studies the aeromagnetic features of two typical porphyry deposits in South Gangdise（Jiama and Qulong） by three-dimensional inversion of magnetic data.Combined with previous achievements,this paper concludes that the upright rock and back magnetization constitutes the principal feature of these two deposits.On such a basis,in combination with the distributional regularity of porphyry copper deposits in South Gangdise,this paper predicts porphyry copper deposits of this type by Hough transform.,and delineates 18 potential prospecting areas,thus providing important information for mineral exploration.
出处
《物探与化探》
CAS
CSCD
2013年第1期53-58,共6页
Geophysical and Geochemical Exploration
关键词
航磁
三维物性反演
斑岩型矿床
边缘检测
霍夫变换
aeromagnetic survey
three-dimensional inversion of magnetic data
porphyry deposit
edge detection
Hough transform
