青海省东昆仑纳赤台地区正、负异常特征及找矿方向
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摘要
随着非线性统计科学的发展,越来越多的理论随之诞生,分形理论就是其中之一,而将其应用在地球化学正、负异常的圈定中不仅能保证原始数据的全面性,同时大大提高了圈定范围的准确性。选取纳赤台地区1∶5万图幅北半幅为研究区,以原始地球化学数据为基础,利用分形方法中含量-面积法对研究区正、负异常重新圈定,效果较好,并对正、负异常进行了叠加研究。根据研究区地质特征、地球化学特征,并结合分形理论圈定的正、负异常,在研究区内圈定了4处找矿靶区,为进一步找矿工作指明了方向。
With the development of nonlinear statistical science,more and more theories have come into being,The fractal theory is one of them. Its application to the delineation of geochemical positive,negative anomalies not only guarantees the comprehensiveness of the original data,but also greatly improves the accuracy of the delineation range.In this paper,the northern half of 1∶ 50 000 map of Nachitai area is selected as the research area. Based on the original geochemical data,the paper uses the content-area method in the fractal method to delineate the positive and negative anomalies in the study area,achieving satisfactory effect,and at the same time,the superposition of the positive and negative anomalies is studied. According to the regional geologic and geochemical characteristics,and the positive and negative anomalies delineated by fractal theory,4 prospecting targets are delineated in the study area,pointing out the direction for next-step prospecting work.
With the development of nonlinear statistical science,more and more theories have come into being,The fractal theory is one of them. Its application to the delineation of geochemical positive,negative anomalies not only guarantees the comprehensiveness of the original data,but also greatly improves the accuracy of the delineation range.In this paper,the northern half of 1∶ 50 000 map of Nachitai area is selected as the research area. Based on the original geochemical data,the paper uses the content-area method in the fractal method to delineate the positive and negative anomalies in the study area,achieving satisfactory effect,and at the same time,the superposition of the positive and negative anomalies is studied. According to the regional geologic and geochemical characteristics,and the positive and negative anomalies delineated by fractal theory,4 prospecting targets are delineated in the study area,pointing out the direction for next-step prospecting work.
引文
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[8]李长江,麻土华,朱兴盛,等.分形布朗运动与地球化学测量——地壳中元素含量空间分布的定量表征[J].地质论评,1999,45(1):76-84.
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[10]孙忠军.矿产勘查中化探异常下限的多重分形计算方法[J].物探化探计算技术,2007,29(1):54-57.
[11]徐明钻,朱立新,马生明,等.多重分形模型在区域地球化学异常分析中的应用探讨[J].地球学报,2010,31(4):611-618.
[2]马生明,朱立新,刘崇民,等.斑岩型Cu(Mo)矿床中微量元素富集贫化规律研究[J].地球学报,2009,30(6):821-830.
[3]周俊法.地球化学负异常的地质找矿意义[J].地质与勘探,1987,23(4):65-69.
[4]史长义,汪彩芳.区域次生地球化学负异常模型及其意义[J].物探与化探,1995,19(2):104-113.
[5]斯梅斯洛夫,鲁德尼克,金科夫,等.地球化学预测与找矿[M].阎立本,译.北京:地质出版社,1985:76-77.
[6]朴寿成,刘树田,连长云,等.地球化学负异常及其找矿意义[J].地质与勘探,1996,32(2):46-50.
[7]朱华平,张德全.区域化探异常的地球化学勘查评价方法技术进展综述[J].地质与勘探,2003,39(3):35-38.
[8]李长江,麻土华,朱兴盛,等.分形布朗运动与地球化学测量——地壳中元素含量空间分布的定量表征[J].地质论评,1999,45(1):76-84.
[9]成秋明.多维分形理论和地球化学元素分布规律[J].地球科学,2000,25(3):311-318.
[10]孙忠军.矿产勘查中化探异常下限的多重分形计算方法[J].物探化探计算技术,2007,29(1):54-57.
[11]徐明钻,朱立新,马生明,等.多重分形模型在区域地球化学异常分析中的应用探讨[J].地球学报,2010,31(4):611-618.