土耳其西南部b y k Menderes盆地Germencik-Nazilli地区浅层地热流体和非地热流体的混合

IF 1.5 Q1 Earth and Planetary Sciences

Geodinamica Acta Pub Date : 2015-01-02 DOI:10.1080/09853111.2014.979529

A. Bülbül

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引用次数: 6

摘要

研究了土耳其西南部b y k Menderes盆地Germencik-Nazilli地区地热流体与非地热流体混合过程中地下水的水化学特征。研究了32个非地热、地热和地表样品的水文地球化学特征。基于Na-K-Mg地热测量，计算了Germencik油田地热储层的平均温度为150 ~ 240℃。Germencik地热流体的水化学特征与非地热流体不同，主要为na - cl - hco3型地热流体，非地热流体主要为Ca-Mg-HCO3-SO4型地热流体。地热流体中某些微量元素的高含量很可能来源于长时间的水岩相互作用，反映了流动路径和停留时间的信号。基于B、Cl和Na浓度，采用质量平衡方法计算地热流体和非地热流体的混合比。Germencik油田具有上升的地热流体和上覆的非地热流体的显著特征。在德国，由深层热源演化而来的第四纪含水层储水量较低。非地热井中有5-40%地热流体)。地热和非地热流体的混合是由于地下水的利用造成的，并且在活动断层附近增加。浅层地下水成分的灌溉被认为是低温地热流体的涌入。

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Mixing of geothermal and non-geothermal fluids in shallow aquifers in the Germencik-Nazilli area, Büyük Menderes Basin (SW Turkey)

This study observes groundwater hydrochemical characteristics during mixing between geothermal and non-geothermal fluids in Germencik–Nazilli area in the Büyük Menderes Basin (SW Turkey). Hydrogeochemical features of 32 non-geothermal, geothermal and surface samples were studied. The mean temperatures of the geothermal reservoirs are calculated to be 150–240 °C in Germencik field, based on Na-K-Mg geothermometry. Hydrochemical characteristics of Germencik geothermal fluid differ from non-geothermal fluids, mainly Na-Cl-HCO3-type geothermal fluid, while non-geothermal fluid is mostly Ca-Mg-HCO3-SO4 type. High contents of some minor elements in geothermal fluids are most likely sourced from prolonged water-rock interaction, reflecting the signals of flow paths and residence times. A mass-balance approach was used to calculate mixing ratios between geothermal and non-geothermal fluids based on B, Cl and Na concentrations. Germencik field is considerably characterised by rising geothermal fluids and overlying non-geothermal fluids. The amount of water stored in the Quaternary aquifer evolved from a deep thermal source is low in Germencik (.5–40% geothermal fluid in non-geothermal wells). Mixing between geothermal and non-geothermal fluids has been caused by groundwater utilisation practices and is increased close to active faults. Irrigation of the shallow groundwater composition is considered as influx of low-temperature geothermal fluid.

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来源期刊

Geodinamica Acta 地学-地球科学综合

CiteScore

4.50

自引率

0.00%

发文量

审稿时长

25 weeks

期刊介绍： Geodinamica Acta provides an international and interdisciplinary forum for the publication of results of recent research dealing with both internal and external geodynamics. Its aims to promote discussion between the various disciplines that work on the dynamics of the lithosphere and hydrosphere. There are no constraints over themes, provided the main thrust of the paper relates to Earth''s internal and external geodynamics. The Journal encourages the submission of papers in all fields of earth sciences, such as biostratigraphy, geochemistry, geochronology and thermochronology, geohazards and their societal impacts, geomorphology, geophysics, glaciology, igneous and metamorphic petrology, magmatism, marine geology, metamorphism, mineral-deposits and energy resources, mineralogy, orogeny, palaeoclimatology, palaeoecology, paleoceanograpgy, palaeontology, petroleum geology, sedimentology, seismology and earthquakes, stratigraphy, structural geology, surface processes, tectonics (neoteoctonic, plate tectonics, seismo-tectonics, Active tectonics) and volcanism. Geodinamica Acta publishes high quality, peer-reviewed original and timely scientific papers, comprehensive review articles on hot topics of current interest, rapid communications relating to a significant advance in the earth sciences with broad interest, and discussions of papers that have already appeared in recent issues of the journal. Book reviews are also included. Submitted papers must have international appeal and regional implications; they should present work that would be of interest to many different specialists. Geographic coverage is global and work on any part of the world is considered. The Journal also publishes thematic sets of papers on topical aspects of earth sciences or special issues of selected papers from conferences.