In the present study, Landsat 8 Operational Land Imager multispectral data covering Gujarat's Kachchh district have been analyzed to map the Deccan Traps. The study area is covered by different lithological units from Middle Jurassic to Holocene rock formation. Deccan Volcanics of Upper Cretaceous to Eocene age consist of Alkali Gabbro, Andesitic Trachyte, Basalt Flows, Intertrappean sediments, Dolerite dykes and Olivine Gabbro. The study aims to distinguish the basalts of Deccan Volcanics using remote sensing data. The basalts were segregated using image processing techniques such as false color composite based on the optimal index factor, band rationing, minimum noise fraction and principal component analysis. Conclusively, entire techniques used differentiated the basalts from other lithological units. The data were validated using laboratory reflectance spectra of rock samples. The map of basalt in Kachchh district was created from the processed Landsat 8 OLI image manifesting different flows, and it covers an area of total 1913.95 sq km.

中文翻译：

---

Landsat 8 OLI 在古吉拉特邦 Kachchh 德干圈闭测绘中的应用

在本研究中，对覆盖古吉拉特邦 Kachchh 地区的 Landsat 8 Operational Land Imager 多光谱数据进行了分析，以绘制德干圈闭的地图。研究区被从中侏罗世到全新世岩层的不同岩性单元所覆盖。上白垩世至始新世的德干火山包括碱辉长岩、安山质粗面岩、玄武岩流、圈层沉积物、辉绿岩脉和橄榄辉长岩。该研究旨在利用遥感数据区分德干火山的玄武岩。玄武岩使用图像处理技术分离，例如基于最佳指数因子、波段配给、最小噪声分数和主成分分析的假彩色合成。最后，使用的整个技术将玄武岩与其他岩性单元区分开来。使用岩石样品的实验室反射光谱对数据进行了验证。Kachchh区玄武岩图是根据Landsat 8 OLI影像处理后的不同流动情况绘制的，总面积1913.95平方公里。