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Aeromagnetic anomaly map for India: the scientific need
Arabian Journal of Geosciences Pub Date : 2020-06-04 , DOI: 10.1007/s12517-020-05453-0
Chandrasekhar Patibandla , Vinay Kumar Dadhwal

Aeromagnetic methods are primarily used for regional geological mapping and in the exploration of natural resources such as oil and gas, minerals, and groundwater. They are also extremely useful in research studies on the internal structure and evolution of the earth, plate tectonics, and earthquakes. Such studies require the potential field aeromagnetic data to be digitally accessible. Aeromagnetic data coverage has already been completed and published for many countries and continents; digitally compiled anomaly maps were prepared and are being used in the exploration and exploitation of natural resources, disaster studies, and research activities. In contrast, India is not entirely covered by aeromagnetic surveying. But certain selected regions covering approximately 70% of the geographic land area of the country were covered with diverse technical specifications and the data is available in a number of disparate individual surveys and flying seasons, tied-up individually to their respective tie-line set up, largely non-digital and poorly archived. The gap areas include the Himalayas, Gangetic plains, Bengal basin, Deccan traps, and Aravalli mountains. The aeromagnetic coverage of these areas is also extremely important with regard to natural resources and hazards. Hence, the gap areas are also required to be covered and the whole data of the country need to be digitally linked together, on top priority, for generating a digitally compiled aeromagnetic anomaly map and database for India. The aeromagnetic data of approximately 48,400 km2 of area flown in three different blocks and time periods with varied survey specifications comprising parts of Andhra Pradesh, Tamil Nadu, and Karnataka states of southern India was digitally compiled and is presented.



中文翻译:

印度的航空磁异常图:科学需求

航磁方法主要用于区域地质制图和勘探自然资源,例如石油,天然气,矿产和地下水。它们在有关地球内部结构和演化,板块构造和地震的研究中也非常有用。此类研究要求以数字方式获取潜在的现场航空磁数据。航空数据覆盖范围已经在许多国家和大洲完成并发布;编写了数字编辑的异常图,并将其用于自然资源的勘探和开发,灾难研究和研究活动。相比之下,印度并未完全被航空磁性测量所覆盖。但是某些选定的区域覆盖了该国约70%的土地面积,具有不同的技术规范,并且这些数据可以在许多不同的个人调查和飞行季节中获得,并分别与各自的联络线建立联系,大部分为非数字形式,且归档不良。差距地区包括喜马拉雅山脉,恒河平原,孟加拉盆地,德干陷阱和阿拉瓦利山脉。就自然资源和危害而言,这些区域的航空电磁覆盖也极为重要。因此,还需要覆盖空白区域,并且最重要的是,需要将该国家的整个数据数字化链接在一起,以便为印度生成数字化编辑的航空磁异常图和数据库。大约48,400 km的航空磁数据 很大程度上是非数字的,并且存档不善。差距地区包括喜马拉雅山脉,恒河平原,孟加拉盆地,德干陷阱和阿拉瓦利山脉。就自然资源和危害而言,这些区域的航空电磁覆盖也极为重要。因此,还需要覆盖空白区域,并且最重要的是,需要将该国家的整个数据数字化链接在一起,以便为印度生成数字化编辑的航空磁异常图和数据库。大约48,400 km的航空磁数据 很大程度上是非数字的,并且存档不善。差距地区包括喜马拉雅山脉,恒河平原,孟加拉盆地,德干陷阱和阿拉瓦利山脉。就自然资源和危害而言,这些区域的航空电磁覆盖也极为重要。因此,还需要覆盖空白区域,并且最重要的是,需要将该国家的整个数据数字化链接在一起,以便为印度生成数字化编辑的航空磁异常图和数据库。大约48,400 km的航空磁数据 还需要覆盖空白区域,并且最重要的是,必须将印度的整个数据数字化链接在一起,以便为印度生成数字化编辑的航空磁异常图和数据库。大约48,400 km的航空磁数据 还需要覆盖空白区域,并且最重要的是,必须将印度的整个数据数字化链接在一起,以便为印度生成数字化编辑的航空磁异常图和数据库。大约48,400 km的航空磁数据数字编制并介绍了在三个不同的块和时间段中飞行的2个区域,其中包括印度南部的安得拉邦,泰米尔纳德邦和卡纳塔克邦各州不同的调查规格。

更新日期:2020-06-04
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