云南省金平县老集寨铅多金属矿区激电异常推断解释研究

发布时间：2018-03-18 05:23

本文选题：云南金平老集寨　切入点：铅多金属矿　出处：《昆明理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：铅是重要的有色金属资源。云南省金平县老集寨铅多金属矿区有较好的成矿背景。在地表浮土覆盖较厚而地质、化探、遥感资料缺乏的情况下,迫切需要快速有效的物探手段来查明隐伏的铅矿体分布、圈定找矿靶区。国内外众多找矿案例证明激发极化法特别适合寻找隐伏的浸染状矿体。因此在该区开展激发极化法中梯扫面工作。2014年3月～5月在测区完成100×20(线距/米×点距/米)网度的激电中梯扫面测线17条,采集岩矿石标本67件并测定电参数。采集、测定的数据质量符合规范要求。制作推断解释图件10幅。为压制干扰,突出有效信息,对数据进行了滤波和互相关等处理。本文总结了区域地质、测区地质和地球物理特征,根据地质、地球物理特征对获得的异常进行了定性、半定量解释推断。定性圈定和解释了4个视极化率异常、7个视极化率衰减度异常和6个视电阻率异常。4个视极化率异常中,1个为已知矿异常、3个有找矿意义异常。7个视极化率衰减度异常中,1个为已知矿异常,5个为找矿有意义异常、1个为性质不明异常；圈定的6个视电阻率异常中,1个为已知矿体异常、3个为找矿有意义异常、2个性质不明异常。对两条找矿有意义异常所指示的场源体走向、倾向和倾角进行了定量、半定量推断,推断结果经工程验证效果较好。
[Abstract]:Lead is an important nonferrous metal resource. There is a good metallogenic background in Laojizhai lead polymetallic ore area in Jiping County, Yunnan Province. There is an urgent need for rapid and effective geophysical methods to identify the distribution of hidden lead ore bodies, Many cases at home and abroad prove that the induced polarization method is especially suitable for searching for concealed disseminated orebodies. Therefore, the work of ladder sweeping in the area is carried out. From March 2014 to May, 100 脳 20 (line distance) was completed in the survey area. 17 ladder sweep lines in the IP / m 脳 dot / m) meshes, 67 samples of rock and ore were collected and electrical parameters were measured. The quality of data collected and measured met the requirements of the specification. Ten inferred and interpreted maps were made. In order to suppress interference and highlight effective information, The data are processed by filtering and cross-correlation. The geological and geophysical characteristics of regional geology, survey area and geophysics are summarized in this paper. The anomalies obtained are qualitatively analyzed according to geological and geophysical characteristics. Four apparent polarizability anomalies, seven apparent polarizability attenuation anomalies and six apparent resistivity anomalies have been qualitatively delineated and interpreted. Of the 4 apparent polarizability anomalies, 1 is known ore anomaly and 3 have prospecting significance anomaly. Of the 7 apparent polarizability attenuation anomalies, 1 is known ore anomaly, 5 are prospecting significant anomalies and 1 is unknown in nature. Of the 6 apparent resistivity anomalies delineated, 1 is known ore body anomaly, 3 are ore-prospecting significant anomalies, 2 are unknown anomalies. Quantitative and semi-quantitative extrapolation of field source strike, tendency and dip angle indicated by two ore-prospecting meaningful anomalies are carried out. The inferred results are proved to be better by engineering.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.2;P631.324

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