云南镇康地区重磁异常特征及找矿方向
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摘要
镇康地区位于三江成矿带南段的保山-永德(镇康)地块内.在特定的成矿地质背景下构成了铅、锌、铜、铁、锡、锑、铌钽等多金属矿集区,是云南镇康芦子园-云县高井槽地区铁铅锌铜多金属矿国家整装勘查区.本文在系统分析该区找矿成果的基础上,将1∶50 000重、磁异常进行叠加套合后发现,重力剩余异常形态与磁异常特征相似,为正、负异常伴生,展布方向主要为北东向,且延伸较长,规模大、极值强、与已发现呈带状分布的大中型矿床套合程度高,通过对芦子园-小河边铁矿-天生桥磁异常加密工程验证证明,该区采用重、磁找矿方法是有效的.并在研究区内通过重、磁异常特征分析及其与成矿关系研究,成功建立镇康地区重磁找矿预测模型,圈定了三个找矿异常区.
Zhenkang area is located in Baoshan- Yongde( Zhenkang) block,southern section of Sanjiang metallogenic belt. Under the specific ore- forming geological conditions,the accumulation area of Pb,Zn,Cu,Fe,Sn,Sb,Nb and Ta polymetallic is formed,which is Luziyuan- Gaojingcao Fe- Pb- Zn- Cu polymetallic integrated exploration area. Based on the systematic analysis on the basis of prospecting results in the area,gravity and magnetic anomaly and superposition to 1∶ 50 000 sets,it is found that the residual gravity anomaly and magnetic anomaly characteristics are similar. The positive and negative anomalies are associated,the distribution direction mainly on the east to the north,with a longer extension,large scale,strong extremum,which fits the pattern in the distribution of the strip of the high degree,middle or large- sized deposits sheath. The effectiveness of this method is verified through Luziyuan- Xiaohebian- Tianshengqiao magnetic anomaly encryption engineering. Through the analysis of gravity and magnetic anomaly characteristics and mineralization,the prospecting prediction model in Zhenkang area is established to select three prospecting anomaly areas.
Zhenkang area is located in Baoshan- Yongde( Zhenkang) block,southern section of Sanjiang metallogenic belt. Under the specific ore- forming geological conditions,the accumulation area of Pb,Zn,Cu,Fe,Sn,Sb,Nb and Ta polymetallic is formed,which is Luziyuan- Gaojingcao Fe- Pb- Zn- Cu polymetallic integrated exploration area. Based on the systematic analysis on the basis of prospecting results in the area,gravity and magnetic anomaly and superposition to 1∶ 50 000 sets,it is found that the residual gravity anomaly and magnetic anomaly characteristics are similar. The positive and negative anomalies are associated,the distribution direction mainly on the east to the north,with a longer extension,large scale,strong extremum,which fits the pattern in the distribution of the strip of the high degree,middle or large- sized deposits sheath. The effectiveness of this method is verified through Luziyuan- Xiaohebian- Tianshengqiao magnetic anomaly encryption engineering. Through the analysis of gravity and magnetic anomaly characteristics and mineralization,the prospecting prediction model in Zhenkang area is established to select three prospecting anomaly areas.
引文
[1]赵志芳,卢映祥,谢蕴宏,等.镇康芦子园地区遥感和GIS成矿预测示范研究[J].云南地质,2002,21(3):300-307.
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[11]杨玉龙,叶霖,程增涛,等.保山镇康地块夕卡岩型铅锌矿床成因初探[J].岩石矿物学杂志,2012,31(4):554-564.
[12]陶琰,胡瑞忠,朱飞霖,等.云南保山核桃坪铅锌矿成矿年龄及动力学背景分析[J].岩石学报,2010,26(6):1760-1772.
[13]朱飞霖,陶琰,胡瑞忠,等.云南镇康芦子园铅-锌矿的成矿年龄[J].矿物岩石地球化学通报,2011,30(1):73-79.
[14]吕昶良,邓明国,胡伟.云南镇康芦子园铅锌矿成矿条件及赋存规律研究[J].地质找矿论丛,2013,28(4):529-534.
[15]林冰霞,邓明国,沙建泽,等.云南镇康芦子园铅锌多金属矿床矿石组构特征及矿床成因探讨[J].河南科学,2013,31(4):494-499.
[16]刘伟,邓明国.云南镇康芦子园铅锌铁多金属矿床矿石矿物特征及成因分析[J].地质找矿论丛,2014,29(3):381-386.
[17]邓必方.保山-镇康地区汞、铅锌矿床的成矿模式[J].云南地质,1995,14(4):355-363.
[2]李开毕,杨淑胜,蔡旭.高精度磁测在镇康芦子园矿区勘查中的作用及效果[J].云南大学学报(自然科学版),2012,34(S2):157-162.
[3]中国地质科学院地球物理地球化学勘查研究所.中国重要金属矿勘查物探化探方法技术应用[M].北京:地质出版社,2011:168-178.
[4]杨孝武,官德任.物化探在保山核桃坪矿床中的综合应用[J].云南地质,2011,30(1):78-82.
[5]刘椿,任明君.皖南屯溪地区重磁异常特征及找矿方向[J].物探与化探,2015,39(1):35-40.
[6]李文昌,莫宣学.西南“三江”地区新生代构造及其成矿作用[J].云南地质,2001,22(4):333-346.
[7]夏庆霖,陈永清,卢映祥,等.云南芦子园铅锌矿床地球化学、流体包裹体及稳定同位素特征[J].地球科学,2005,30(2):177-186.
[8]安国英.云南省三江地区区域地球化学特征及铜多金属矿找矿意义[J].物探与化探,2014,38(5):962-969.
[9]邓明国,林冰霞,梁徐文,等.云南镇康芦子园铅锌多金属矿床稀土元素地球化学特征及意义[J].中国稀土学报,2013,32(1).117-128
[10]董文伟,陈少铃.镇康芦子园铅锌矿床特征及成因[J].云南地质,2007,26(4):404-410.
[11]杨玉龙,叶霖,程增涛,等.保山镇康地块夕卡岩型铅锌矿床成因初探[J].岩石矿物学杂志,2012,31(4):554-564.
[12]陶琰,胡瑞忠,朱飞霖,等.云南保山核桃坪铅锌矿成矿年龄及动力学背景分析[J].岩石学报,2010,26(6):1760-1772.
[13]朱飞霖,陶琰,胡瑞忠,等.云南镇康芦子园铅-锌矿的成矿年龄[J].矿物岩石地球化学通报,2011,30(1):73-79.
[14]吕昶良,邓明国,胡伟.云南镇康芦子园铅锌矿成矿条件及赋存规律研究[J].地质找矿论丛,2013,28(4):529-534.
[15]林冰霞,邓明国,沙建泽,等.云南镇康芦子园铅锌多金属矿床矿石组构特征及矿床成因探讨[J].河南科学,2013,31(4):494-499.
[16]刘伟,邓明国.云南镇康芦子园铅锌铁多金属矿床矿石矿物特征及成因分析[J].地质找矿论丛,2014,29(3):381-386.
[17]邓必方.保山-镇康地区汞、铅锌矿床的成矿模式[J].云南地质,1995,14(4):355-363.