Type of Mineral Deposits on Alteration Rocks using Petrography, X-Ray Fluorescence (XRF), and X-Ray Diffraction (XRD) Method in Geothermal Prospect in Tiouw Village, Maluku

JPSE (Journal of Physical Science and Engineering) Pub Date : 2020-07-17 DOI:10.17977/um024v4i22019p037

R. Lokollo, J. R. Kelibulin

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引用次数: 1

Abstract

Indonesia is a country with abundant geothermal energy potential. One of the locations that have potential geothermal energy sources is Tiouw Village, Saparua, Central Maluku. This study was conducted on the types of mineral deposits using the petrographic method, X-Ray Diffraction (XRD), and X-Ray Fluorescence (XRF). Based on the results of petrographic analysis and XRD, rock samples 1, 2, and 3 of Tiouw include andesite igneous rocks with propylitic alteration type. While sample 4 is dacite igneous rock with argillic alteration type. Each rock sample has a mineral set of kaolinite, chlorite, quartz, cristobalite, epidote, and plagioclase. The XRF results showed the highest chemical composition of SiO 2 , followed by Al 2 O 3 and K 2 O. This mineral content can indicate the subsurface temperature of the geothermal field in the range of 200–300 oC with varying salinity, pH close to neutral, and low permeability. This interpreted that the type of mineral deposits in Tiouw Village was high sulfidation epithermal deposits. DOI: http://dx.doi.org/10.17977/um024v4i22019p037

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用岩石学、x射线荧光(XRF)和x射线衍射(XRD)方法研究马鲁古Tiouw村蚀变岩上的矿床类型

印尼是一个地热能源潜力丰富的国家。马鲁古中部萨帕鲁阿的Tiouw村是拥有潜在地热能源的地点之一。利用岩石学方法、x射线衍射(XRD)和x射线荧光(XRF)对矿床类型进行了研究。岩石学分析和XRD结果表明，Tiouw岩样1、2、3为安山岩火成岩，具有丙基蚀变型。样品4为英安岩火成岩，具有泥质蚀变型。每个岩石样品都有一组矿物，包括高岭石、绿泥石、石英、方英石、绿帘石和斜长石。XRF结果显示，该地热田的化学成分以sio2最高，al2o3次之，k2o次之，表明该地热田的地下温度在200 ~ 300℃之间，盐度变化，pH接近中性，渗透率较低。由此推断，头窝村矿床类型为高硫化浅成热液矿床。DOI: http://dx.doi.org/10.17977/um024v4i22019p037

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JPSE (Journal of Physical Science and Engineering)

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