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首页> 外文会议>Workshop on Geothermal Reservoir Engineering >Structural Geology of Eburru Volcano and Badlands Geothermal Prospects in Kenya
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Structural Geology of Eburru Volcano and Badlands Geothermal Prospects in Kenya

机译：肯尼亚橡木火山和荒地地热前景的结构地质

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Eburru is a Quaternary volcano situated on the southern segment of Kenya Rift, an arm of the larger EARS, it forms the highest topography/peak within the entire Kenyan rift floor at an elevation of 2800m, while Badlands lies lower to the North of Eburru massif towards Lake Elementaita. This paper describes the results from examination of existing data and geological exploration by KenGen geology team during structural geological mapping of Eburru and Badlands geothermal prospects. The exercise was carried on May, 2014 with objective to pinpoint the structural setting, map geothermal manifestations and mapping of alteration characteristics and identify the possible location of heat sources. The main structures observed in Eburru area include a series of fault and fracture network system with a general N-S trends and minor E-W, NE-SW and NNE-SSW trending faults, craters and ring structure. These structures play a significant role in controlling the recharge and fluid movement within the geothermal system especially at the intersection of E-W and N-S faults. On mapping Badlands geothermal prospect; distinct N-S trending faults and fractures outlining both the regional and local tectonics with minor NE-SW trending faults were noted, possibly the main control of recharge and fluid movement within the geothermal system in the area. These faults, fractures and fissures form a fissure zone of ≈7-10 km wide. However, within the fissure zone at least one mini-graben was observed (≈2 km wide), which may be of significant geothermal interest. Geologically younger structures were noted in Badlands area. Rock types range from mafic to siliceous rich lavas. Basalt, trachytes, rhyolites and pyroclastics are common in the Eburru area. Obsidian outcrops and pumice cover were noted at hill tops. Basalts with minor obsidian, trachyte, volcanic agglomerates, pyroclastics, tuff and sporadic trachy-andesites are the predominant rock types characterizing the Badlands geothermal prospect.
机译：Eurru是一个位于肯尼亚裂谷的南部段的四季大火山，它的耳朵的一部分，它形成了整个肯尼亚裂口楼内的最高地形/峰值，在2800米的海拔地区，而荒地位于埃克兰北部的北部朝向元素湖。本文介绍了卫生和荒地地质前景的结构地质映射期间凯恩地质队的现有数据和地质勘探的结果。该练习于2014年5月举行，目的是针对结构设置，地图地热表现和改变特征的绘图，并确定热源的可能位置。在Eubru区域观察到的主要结构包括一系列故障和骨折网络系统，具有通用N-S趋势和次要E-W，NE-SW和NNE-SSW趋势故障，陨石坑和环形结构。这些结构在控制地热系统内的充电和流体运动方面发挥了重要作用，特别是在E-W和N-S故障的交叉点。在绘制荒地地热展望;概述了概述了区域和局部构造的不同的N-S趋势和骨折，可能是该地区地热系统内的充电和流体运动的主要控制。这些故障，裂缝和裂缝形成宽度的裂隙区。然而，在裂缝区内观察到至少一个迷你graben（≈2公里宽），这可能具有显着的地热感兴趣。在荒地地区注意到地质上年轻的结构。岩石类型范围从MAFIC到愚蠢的富含熔岩。玄武岩，颅骨，籽晶酸盐和发球菌在艾堡地区很常见。 Hill Tops指出了黑曜石露头和浮石封面。具有次要黑曜石，颅骨，火山凝聚，发球菌，凝灰岩和散发性的玄武岩，是表征荒地地热前景的主要岩石类型。

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