摘要
常宁县汤市硼矿属接触交代—热液型矿床。区内沉积岩和花岗岩磁性微弱或无磁性,与硼矿密切相关的矽卡岩及硼矿石中磁铁矿含量较高。大理岩型硼矿石磁化率168×10^(-1)nT,矽卡岩型硼矿石磁化率29033×10^(-1)nT。已知半边街矿段△T等值线形态反映出矿体产状,并与矿体投影形态一致。用△T高精度磁测寻找埋深大、磁性弱的隐伏内生硼矿是有效的方法之一。从已有磁测资料分析,预测该地区瓦盏洲一新屋山、周家屋场一带可作为硼矿找矿靶区。
Tangshi boron deposit in Changning county is a contact metasomatic-hydrothermal type one. The sedimentary rocks and granite in the region are of very weak or no mag-netism, while the boron ore and skarn with close relation to boron mineralization are of quite high content of magnetite. The magnetic capacity of marble type of boron ore is 168×10^(-1) nT, skarn type of boron ore 29033×10^(-1) nT. It is already known that the shape of T isopleth in Banbianjie segment of the boron deposit is the inflection of the orebody, and is consistent with the projecting shape of the orebody. The high precision T magnetic survey is an effective method in finding deeply-buried concealed endogenic boron with weak magnetism. Analysed from the available magnetic survey data, it is predicted that the areas from Wazhanzhou to Xinwushan, Zhoujiawuchang can be regarded as targets for boron deposits.
出处
《湖南地质》
1992年第1期71-74,共4页
Hunan Geology
关键词
硼矿
矿床
热液型
磁法
勘探
Geophysical exploration
Magnetic survey
Hydrothermal boron deposits
