高光谱在甘肃红山多金属找矿模型构建中的应用

doi:10.6046/gtzyyg.2020.03.29

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摘要

为深入研究和探讨高光谱遥感技术在地质找矿中的应用效果和潜力,利用甘肃红山地区的航空和地面高光谱遥感数据,剖析蚀变矿物或蚀变异常信息的分布特征,总结成矿地质体的蚀变异常展布规律,提出基于已知典型矿床的蚀变信息特征成矿、控矿要素和基于成矿地质体蚀变信息规律的成矿地质环境要素找矿定位模型构建思路,逐步揭示“矿物—标志性矿物—蚀变矿物—找矿异常”所表达的成矿地质环境,构建典型矿床找矿定位模型和蚀变矿物与地质背景综合找矿定位模型。以找矿定位模型为指导,结合红山地区地质背景和成矿规律,开展不同模型找矿应用,圈定多金属找矿预测区4处; 经野外查证,发现较好的多金属矿化线索。实践表明,通过剖析高光谱蚀变信息和成矿规律的内在联系,能为找矿提供较为准确的信息,也可为同类多金属的找矿工作提供有效参考。

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	王瑞军
	张春雷
	孙永彬
	王诜
	董双发
	王永军
	闫柏琨

关键词 ：高光谱遥感, 蚀变矿物组合, 找矿定位模型, 找矿分析, 甘肃红山

Abstract：

In order to further study and explore the application effect and potential of hyperspectral remote sensing technology in geological prospecting, the authors used the aerial and ground hyperspectral remote sensing data of Hongshan region in Gansu Province to analyze the distribution characteristics of altered minerals or altered anomaly information, summarized the distribution law of altered anomaly of ore-forming geological bodies, and proposed the construction idea of ore-finding positioning model of ore-forming geological environment elements based on alteration information characteristics of known typical deposits, ore-controlling elements and alteration information law of ore-forming geological bodies. The authors gradually revealed the metallogenic geological environment expressed by “minerals-landmark minerals-altered minerals-prospecting anomalies”, and constructed the prospecting positioning model of typical deposits and the comprehensive prospecting positioning model of altered minerals and geological background. Guided by the ore-finding positioning model and combined with geological background and ore-forming laws, the authors applied different models to delineate 4 polymetallic prospective areas. After field investigation, better clues of polymetallic mineralization were found. Practice shows that, by analyzing the intrinsic relationship between hyperspectral alteration information and ore-forming laws, more accurate information can be provided for ore prospecting, and the same kind of polymetallic ore prospecting work can be effectively guided.

Key words： hyperspectral remote sensing altered mineral assemblage prospecting positioning model prospecting analysis Hongshan Gansu Province

收稿日期: 2019-11-25 出版日期: 2020-10-09

:	P612
	TP79

基金资助:中国地质调查局地质调查项目“天山—北山重要成矿区带遥感调查”(121201003000150008)

作者简介: 王瑞军(1985-),男,高级工程师,主要从事矿产勘查及研究等工作。Email: ruijun123wang@126.com。

引用本文:

王瑞军, 张春雷, 孙永彬, 王诜, 董双发, 王永军, 闫柏琨. 高光谱在甘肃红山多金属找矿模型构建中的应用[J]. 国土资源遥感, 2020, 32(3): 222-231.
WANG Ruijun, ZHANG Chunlei, SUN Yongbin, WANG Shen, DONG Shuangfa, WANG Yongjun, YAN Bokun. Application of hyperspectral spectroscopy to constructing polymetallic prospecting model in Hongshan, Gansu Province. Remote Sensing for Land & Resources, 2020, 32(3): 222-231.

链接本文:

https://www.gtzyyg.com/CN/10.6046/gtzyyg.2020.03.29 或 https://www.gtzyyg.com/CN/Y2020/V32/I3/222

Fig.1 红山地区地质简图
1.全新统; 2.奥陶系锡林柯博组; 3.奥陶系罗雅楚山群; 4.寒武系西双鹰山群; 5.震旦系泽鲁木群; 6.南华系洗肠井组; 7.青白口系大豁落山群; 8.蓟县系平头山群; 9.长城系古硐井群; 10.二长花岗岩; 11.黑云母花岗岩; 12.石英闪长岩; 13.英云闪长岩; 14.辉长—辉绿岩; 15.角闪石岩; 16.角闪橄榄岩; 17.花岗岩脉; 18.辉绿玢岩脉; 19.石英脉; 20.性质不明断层; 21.推测断层; 22.韧性剪切带; 23.地质界线; 24.平行不整合界线; 25.角度不整合界线; 26.地层产状; 27.缝合线; 28.构造单元分界线; 29.构造单元编号; 30.研究区

Tab.1 HyMap航空成像光谱系统主要技术参数表

Fig.2 找矿定位模型构建思路

Fig.3 红山地区高光谱蚀变矿物分布
1.第四系全新统; 2.奥陶系锡林柯博组; 3.奥陶系罗雅楚山群; 4.寒武系西双鹰山群; 5.震旦系泽鲁木群; 6.南华系洗肠井组; 7.青白口系大豁落山群; 8.蓟县系平头山群; 9.长城系古硐井群; 10.二长花岗岩; 11.黑云母花岗岩; 12.石英闪长岩; 13.英云闪长岩; 14.辉长—辉绿岩; 15.角闪石岩; 16.角闪橄榄岩; 17.花岗岩脉; 18.辉绿玢岩脉; 19.石英脉; 20.性质不明断层; 21.推测断层; 22.韧性剪切带; 23.地质界线; 24.平行不整合界线; 25.角度不整合界线; 26.地层产状; 27.褐铁矿; 28.赤铁矿; 29.富铝绢云母; 30.中铝绢云母; 31.贫铝绢云母; 32.黑云母; 33.绿泥石; 34.绿帘石; 35.方解石; 36.白云石; 37.角闪石

Fig.4 典型铁矿床综合信息
1.全新统; 2.奥陶系罗雅楚山群; 4.寒武系西双鹰山群; 5.震旦系泽鲁木群; 6.南华系洗肠井组; 7.青白口系大豁落山群第四岩组; 8.青白口系大豁落山群第三岩组; 9.青白口系大豁落山群第二岩组; 10.蓟县系平头山群; 11.石英闪长岩; 12.英云闪长岩; 13.辉绿岩脉; 14.性质不明断层; 15.地质界线; 16.平行不整合界线; 17.角度不整合界线; 18.褐铁矿; 19.赤铁矿; 20.富铝绢云母; 21.中铝绢云母; 22.贫铝绢云母; 23.黑云母; 24.绿泥石; 25.绿帘石; 26.方解石; 27.白云石; 28.透辉石; 29.透闪石; 30.阳起石; 31.角闪石; 32.矿体; 33.矿化体; 34.近矿围岩; 35.外围近矿围岩; 36.外围正常围岩

Tab.2 红山地区找矿定位模型一览表

Fig.5 红山地区找矿预测区分布图
1.第四系全新统; 2.奥陶系锡林柯博组; 3.奥陶系罗雅楚山群; 4.寒武系西双鹰山群; 5.震旦系泽鲁木群; 6.南华系洗肠井组; 7.青白口系大豁落山群; 8.蓟县系平头山群; 9.长城系古硐井群; 10.二长花岗岩; 11.黑云母花岗岩; 12.石英闪长岩; 13.英云闪长岩; 14.辉长—辉绿岩; 15.角闪石岩; 16.角闪橄榄岩; 17.花岗岩脉; 18.辉绿玢岩脉; 19.石英脉; 20.性质不明断层; 21.推测断层; 22.韧性剪切带; 23.地质界线; 24.平行不整合界线; 25.角度不整合界线; 26.地层产状; 27.褐铁矿; 28.赤铁矿; 29.富铝绢云母; 30.中铝绢云母; 31.贫铝绢云母; 32.黑云母; 33.绿泥石; 34.绿帘石; 35.方解石; 36.白云石; 37.角闪石; 38.找矿预测区; 39.找矿预测区编号

Fig.6 KY01找矿预测区野外查证新发现磁铁矿化实地照片

Fig.7 SY01区野外查证构造蚀变带地表矿化蚀变分布

Fig.8 找矿预测区中蚀变野外照片

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