| 摘要: |
| 最近十年来研究的地质数据包括比尔马尼亚盆地岩相的地层、岩性、岩石、粒度和地球化学资料。这些数据已进入专用的"Foxsedba"数据表以建立比尔马尼亚盆地的数据总库。采用Harward制图法在x-y轴(粒度参数和地球化学数据)上作图。该盆地各种岩相的环境解释模式都配备有"图象"软件。最后,上述资料被用来解释所推断的比尔马尼亚盆地各种岩相的沉积环境。该盆地的沉积充填物含硅质碎屑、碳酸盐和磷块岩相的混合组合,指示变幻不定的沉积环境,即有若干具间歇海进事件的沉积海退事件。结果,磷块岩主要形成一种浅水正化学沉积和异化学沉积的复杂组合。 |
| 关键词: |
| DOI： |
| 附件 |
|
| 基金项目: |
|
| ANALYSIS OF GEOLOGICAL DATA USING COMPUTER APPLICATIONS FOR THE INTERPRETATION OF GEOLOGICAL NATURE OF BIRMANIA BASIN,JAISALMER DISTRICT,WESTERN RAJASTHAN,INDIA |
| S. C. Mathur, D. S. Chauhan |
| (Department of Geology, J. N. V. University, Jodhpur, India) |
| Abstract: |
| The geological data including stratigraphic,lithological,petrographic,granulometric and geochemical of lithofaeies of Birmania basin have been studied for last ten years. These data were entered into specialized and data sheets of "Foxsedba" to establish data bank on Birmania basin. Graphs on x-y axis(for grain parameters and geochemical data)are constructed using "Harward Graphics". Interpretative environmental model of various lithofacies of the basin are prepared using "Image" software. Finally,the aforesaid data are interpreted to infer the environ-ments of sedimentation of the various lithofacies of Birmania basin. The sedimentary fill of Bir-mania basin comprising a mixed assemblages of siliciclastic,carbonate and phosphorite facies in-dicate highly fluctuating sedimentary milieu viz:there were several events of depositional re-gression with intermittent events of transgression. As a consequence phosphorite formed essen-tially as a complex assemblage of shallow water orthochemical and allochemical sediments. |
| Key words: |
