Electromagnetic sounding of geothermal zones

Journal of Applied Geophysics

Volumn 68, Issue 4, 2009, Pages 459-478

  Spichak, Viacheslav ^a   Manzella, Adele ^b  

^a RUSSIAN ACADEMY OF SCIENCES   (Russian Federation)

^b CNR   (Italy)

Author keywords

Alteration mineralogy; Electromagnetic sounding; Geothermal zones; Inversion; Modeling; Resistivity; Temperature

Indexed keywords

ALTERATION MINERALOGY; ELECTROMAGNETIC SOUNDING; GEOTHERMAL ZONES; INVERSION; MODELING; RESISTIVITY;

CRYSTALLOGRAPHY; ELECTROMAGNETISM; GEOTHERMAL FIELDS; GEOTHERMAL WELLS; MINERALOGY; MINERALS; THREE DIMENSIONAL;

GEOTHERMAL PROSPECTING;

DATA INVERSION; ELECTRICAL RESISTIVITY; ELECTROMAGNETIC METHOD; EXPERIMENTAL MINERALOGY; GEOTHERMAL SYSTEM; MAPPING; MODELING; MONITORING; TEMPERATURE;

EID: 68049084619     PISSN: 09269851     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.jappgeo.2008.05.007     Document Type: Article

References (107)

1. Akiyoshi M., and Tagomori K. Geoelectrical structure of the Hatchobaru geothermal field and the adaptability of electrical methods for its understandings. Proc. World Geothermal Congress, Kyushu-Tohoku, Japan (2000)
2. Ander M.A., Gross R., and Strangway D.W. A detailed magnetotelluric/audiomagnetotelluric study of the Jemez Volcanic Zone, New Mexico. J. Geophys. Res. 89 B5 (1984) 3335-3353
3. Anderson E., Jacobo E., and Ussher G. A geothermal reservoir revealed - magnetotelluric and data management techniques in a potent combination. Proc. World Geothermal Congress, Florence, Italy (1995) 899-902
4. Anderson E., Crosby D., and Ussher G. Bulls-eye! - simple resistivity imaging to reliably locate the geothermal reservoir. Proc. World Geothermal Congress, Kyushu-Tohoku, Japan (2000) 909-914
5. Archie G.E. The electrical resistivity log as an aid in determining some reservoir characteristics. Trans. AIME 146 (1942) 54-67
6. Árnason K., and Flóvenz Ó.G. Geothermal exploration by TEM-soundings in central Asal Rift in Djibuti, east Africa. Proc. World Geothermal Congress, Florence, Italy (1995) 933-938
7. Árnason K., Haraldsson G.I., Johnsen G.V., Thorbergsson G., Hersir G.P., Saemundsson K., Georgsson L.S., and Snorrason S.P. Nesjavellir-Olkelduhalsr: A Geological and Geophysical Survey 1986. Orkustofnun Report OS-86018/JHD-02 (1986) 112 p. (in Icelandic)
8. Árnason K., Karlsdottir R., Eysteinsson H., Flóvenz O.G., and Gudlaugsson S.T. The Resistivity Structure of High-Temperature Geothermal Systems in Iceland, Geothermal Congress, Kyushu-Tohoku, Japan (2000) 923-928
9. Asaue H., Koike K., Yoshinaga T., and Takakura S. Magnetotelluric resistivity modeling for 3D characterization of geothermal reservoirs in the Western side of Mt. Aso, SW Japan. J. Appl. Geophys. 58 4 (2006) 296-312
10. Bai D.H., Meju M.A., and Liao Z.J. Magnetotelluric images of deep crustal structure of the Rehai geothermal field near Tengchong, southern China. Geophys. J. Int. 147 (2001) 677-687
11. Bartel L.C., and Jacobson R.D. Results of a controlled-source audio-frequency magnetotelluric survey at the Puhimau thermal area, Kilauea Volcano, Hawaii. Geophysics 52 5 (1987) 665-677
12. Berktold A. Electromagnetic studies in geothermal regions. Geophys. Surv. 6 (1983) 173-200
13. Bibby H.M., Caldwell T.G., Davey F.J., and Webb T.H. Geophysical evidence on the structure of the Taupo Volcanic Zone and its hydrothermal circulation. J. Volcanol. Geotherm. Res. 68 (1995) 29-58
14. Bromley C. Tensor CSAMT study of the fault zone between Waikite and Te Kopia geothermal fields. J. Geomagn. Geoelectr. 45 (1993) 887-896
15. Caglar I., Tuncer V., Kaypak B., and Avsar U. A high conductive zone associated with a possible geothermal activity around Afyon, Northern Part of Tauride Zone, South West Anatolia. Proc. World Geothermal Congress, Antalya, Turkey (2005)
16. Correia A., and Jones F.W. On the existence of the geothermal anomaly in southern Portugal. Tectonophysics 271 (1997) 123-134
17. Correia A., and Safanda J. Geothermal modeling along a two-dimensional crustal profile in southern Portugal. J. Geodyn. 34 (2002) 47-61
18. De Lugao P.P., La Terra E.F., Kriegshauser B., and Fontes S.L. Magnetotelluric studies of the Caldas Novas geothermal reservoir, Brazil. J. Appl. Geophys. 49 (2002) 33-46
19. Del Rosario Jr. R.A., Pastor M.S., and Malapitan R.T. Controlled source magnetotelluric (CSMT) survey of Malabuyoc thermal prospect, Malabuyoc/Alegria, Cebu, Philippines. Proc. World Geothermal Congress, Antalya, Turkey (2005)
20. Demissie Y. Transient electromagnetic resistivity survey at the Geysir geothermal field South Iceland. Proceedings World Geothermal Congress, Antalya, Turkey (2005)
21. Eysteinsson H., and Hermance J.F. Magnetotelluric measurements across the eastern neovolcanic zone in south Iceland. J. Geophys. Res. 90 (1985) 10093-10103
22. Flóvenz O.G., and Karlsdottir R. TEM-resistivity image of a geothermal field in Iceland and the relation of the resistivity with lithology and temperature. Proc. World Geothermal Congress, Kyushu-Tohoku, Japan (2000) 1127-1132
23. Flóvenz O.G., Georgsson L.S., and Árnason K. Resistivity structure of the upper crust in Iceland. J. Geophys. Res. 90 (1985) 10136-10150
24. Flóvenz O.G., Spangerberg E., Kulenkampff J., Árnason K., Karlsdottir R., and Huenges E. The role of electrical interface conduction in geothermal exploration. Proc. World Geothermal Congress, Antalya, Turkey (2005)
25. Frischknecht F.C. Fields about an oscillating magnetic dipole over a two-layered earth and application of ground and airborne surveys. Colo. Sch. Mines Q. 62 (1967) 1-326
26. Fulignati P., Malfitano G., and Sbrana A. The Pantelleria caldera geothermal system; data from the hydrothermal minerals. J. Volcanol. Geotherm. Res. 75 (1997) 251-270
27. Galanopoulus D., Hutton V.R.S., and Dawes G.J.K. The Milos geothermal field: modeling and interpretation of electromagnetic induction studies. Phys. Earth Planet. Inter. 66 (1991) 76-91
28. Gallardo L.A., and Meju M.A. Characterization of heterogeneous near-surface materials by joint 2D inversion of DC resistivity and seismic data. Geophys. Res. Lett. 30 13 (2003) 1658
29. Gallardo L.A., and Meju M.A. Joint two-dimensional cross-gradient imaging of magnetotelluric and seismic travel-time data for structural and lithological classification. Geophys. J. Int. 169 (2007) 1261-1272
30. Gianelli G., Mekuria N., Battaglia S., Chersicla A., Garofalo P., Ruggieri G., Manganelli M., and Gebregziabher Z. Water-rock interaction and hydrothermal mineral equilibria in the Tendaho geothermal system. J. Volcanol. Geotherm. Res. 86 (1998) 253-276
31. Gonzalez-Partida E., Garcia Gutierrez A., and Torres Rodriguez V. Thermal and petrologic study of the CH-A well from the Chipilapa-Ahuachapan geothermal area, El Salvador. Goethermics 26 (1997) 701-713
32. Gonzalez-Partida E., Birkle P., and Torres-Alavarado I.S. Evolution of the hydrothermal system at Los Azufres, Mexico, based on petrologic, fluid inclusion and isotopic data. J. Volcanol. Geotherm. Res. 104 (2000) 277-296
33. Gunderson R., Cimiming W., Astra U., and Harvey C. Analysis of smectite clays in geothermal drill cuttings by the methylene blue method: for well site geothermometry and resistivity sounding correlation. Proc. World Geothermal Congr., Kyushu-Tohoku, Japan (2000) 1175-1181
34. Haak V., Ritter O., and Ritter P. Mapping the geothermal anomaly on the island of Milos by magnetotellurics. Geothermics 18 4 (1989) 533-546
35. Hafizi M.K., Aiobi M., and Rahimi A. The combination of 2-D and 1-D inversion for 2.5D interpretation of magnetotelluric geothermal sites. Expanded abstr. EAGE 64th Conference, Florence, Italy (2002)
36. Harinarayana T., Abdul Azeez K.K., Murthy D.N., Veeraswamy K., Eknath Rao S.P., Manoj C., and Naganjaneyulu K. Exploration of geothermal structure in Puga geothermal field, Ladakh Himalayas, India, by magnetotelluric studies. J. Appl. Geophys. 58 4 (2006) 280-295
37. Hermance J.F. Magnetotelluric measurements across the Eastern neovolcanic zone in south Iceland. J. Geophys. Res. 90 B12 (1985) 10093-10103
38. Hoffmann-Rothe A., Ritter O., and Haak V. Magnetotelluric and geomagnetic modelling reveals zones of very high electrical conductivity in the upper crust of Central Java. Phys. Earth Planet. Inter. 124 3-4 (2001) 131-151
39. Hoover D.B., Frischknecht F.C., and Tippens C. Audiomagnetotelluric soundings as reconnaissance exploration technique in Long Valley, California. J. Geophys. Res. 81 (1976) 801-809
40. Hoover D.B., Long C.L., and Senterfit R.M. Some results from audiomagnetotelluric investigations in geothermal areas. Geophysics 43 (1978) 1501-1514
41. Ingham M.R. Electrical conductivity structure of the Broadlands-Ohaaki geothermal field, New Zealand. Phys. Earth Planet. Inter. 66 (1991) 62-75
42. Kajiwara T., Mogi T., Fomenko E., and Ehara S. Three-dimensional modeling of geoelectrical structure based on MT and TDEM data in Mori geothermal held, Hokkaido, Japan. Proc. World Geothermal Congress, Kyushu-Tohoku, Japan (2000) 1313-1318
43. Lackschewitz K.S., Singer A., Botz R., Schonberg G.D., Stoffers P., and Horz K. Formation and transformation of clay minerals in the hydrothermal deposits of Middle Valley, Juan de Fuca Ridge, ODP Leg 169. Econ. Geol. 95 (2000) 361-389
44. Lagios E., and Apostolopoulos G. Integrated geophysical study of the geothermal system in the southern part of the Nisiros Island, Greece. J. Appl. Geophys. 34 (1995) 55-61
45. Lagios E., Galanopoulos D., Hobbs B.A., and Dawes G.J.K. Two-dimensional magnetotelluric modelling of the Kos Island geothermal region (Greece). Tectonophysics 287 (1998) 157-172
46. Larsen J.C., Mackie R.L., Manzella A., Fiordelisi A., and Rieven S. Robust smooth magnetotelluric transfer functions. Geophys. J. Int. 124 (1996) 801-819
47. Layugan D.B., Rigor Jr. D.M., Apuada N.A., Los Bafios C.F., and Olivar R.E.R. Magnetotelluric (MT) resistivity surveys in vanous geothermal systems in Central Philippines. Proc. World Geothermal Congress, Antalya, Turkey (2005)
48. Lebedev E.B., and Khitarov N.I. Dependence of the beginning of melting of granite and electrical conductivity of its melt on high water vapor pressure. Geokhimija (1964) 195-201 (in Russian)
49. Long C.L., and Kaufman H.E. Reconnaissance geophysics of a known geothermal resource area, Weiser, Idaho, and Vale, Oregon. Geophysics 45 (1980) 312-322
50. Los Banos C.F., and Maneja F.C. The Resistivity Structure of the Mahanagdong Geothermal Field, Leyte, Philippines. Proc. World Geothermal Congress, Antalya, Turkey (2005)
51. Manzella A. Resistivity and heterogeneity of Earth crust in an active tectonic region, southern Tuscany, Italy. Ann. Geophys. 47 (2004) 107-118
52. Manzella A., Spichak V., Pushkarev P., Sileva D., Oskooi B., Ruggieri G., and Sizov Yu. Deep fluid circulation in the Travale geothermal area and its relation with tectonic structure investigated by a magnetotelluric survey. Expanded abstr. 31th Workshop on Geothennal Reservoir Engineering, Stanford University, Stanford, USA (2006)
53. Meju M.A. Geoelectromagnetic exploration for natural resources: models, case studies and challenges. Surv. Geophys. 23 (2002) 133-205
54. Mogi T., and Nakama S. Magnetotelluric interpretation of the geothermal system of the Kuju volcano, southwest Japan. J. Volcanol. Geotherm. Res. 56 (1993) 297-308
55. Mulyadi. Magnetic Telluric method applied for geothermal exploration in Sibayak, North Sumatra. Proc. World Geothermal Congress, Kyushu-Tohoku, Japan (2000) 1469-1472
56. Natland J.-H., and Dick H.J.B. Formation of the lower ocean crust and the crystallization of gabbroic cumulates at a very slowly spreading ridge. J. Volcanol. Geotherm. Res. 110 (2001) 191-233
57. Okada H., Yasuda Y., Yagi M., and Kai K. Geology and fluid chemistry of the Fushime geothermal field, Kyushu, Japan. Geothermics 29 (2000) 279-311
58. Oskooi B., Pedersen L.B., Smirnov M., Árnason K., Eysteinsson H., and Manzella A. The deep geothermal structure of the Mid-Atlantic Ridge deduced from MT data in SW Iceland. Phys. Earth Planet. Inter. 150 (2005) 183-195
59. Patrier P., Papapanagiotou P., Beaufort D., Traineau H., Bril H., and Rojas J. Role of permeability versus temperature in the distribution of the fine (< 0.2 mu m) clay fraction in the Chipilapa geothermal system (El Salvador, Central America). J. Volcanol. Geotherm. Res. 72 (1996) 101-120
60. Pellerin L., Johnston J.M., and Hohmann G.W. A numerical evaluation of electromagnetic methods in geothermal exploration. Geophysics 61 (1996) 121-130
61. Pérez-Flores M.A., and Gomez-Treviño E. Dipole-dipole resistivity imaging of the Ahuachapan-Chipilapa geothermal field, El Salvador. Geothermics 26 5/6 (1997) 657-680
62. Pérez-Flores M.A., and Schultz A. Application of 2-D inversion with genetic algorithms to magnetotelluric data from geothermal areas. Earth Planets Space 54 (2002) 607-616
63. Pérez-Flores M.A., Antonio-Carpio R.G., and Gomez-Treviño E. Tridimensional inversion of DC resistivity data. Proceedings World Geothermal Congress, Antalya, Turkey (2005)
64. Risk G.F., Bibby H.M., Bromley C.J., Caldwell T.G., and Bennie S.L. Appraisal of the Tokaanu-Waihi geothermal field and its relationship with the Tongariro geothermal field, New Zealand. Geothermics 31 (2002) 45-68
65. Romo J.M., Flores C., Vega R., Vázquez R., Pérez Flores M.A., Treviño E.G., Esparza F.J., Quijano J.E., and García V.H. A closely-spaced magnetotelluric study of the Ahuachapan-Chipilapa geothermal field, El Salvador. Geothermics 26 (1997) 627-656
66. Romo J.M., Wong V., and Flores C. The subsurface electrical conductivity and the attenuation of coda waves at Las Tres Virgines geothermal field in Baja California Sur, Mexico, 2000. Proc. World Geothermal Congr., Kyushu-Tohoku, Japan (2000) 1645-1650
67. Sasaki Y., and Meju M.A. Three-dimensional joint inversion for magnetotelluric resistivity and static shift distributions in complex media. J. Geophys. Res. 111 (2006) B05101 10.1029/2005JB004009
68. Sener M., and Gevrek A.I. Distribution and significance of hydrothermal alteration minerals in the Tuzla hydrothermal system, Canakkale, Turkey. J. Volcanol. Geotherm. Res. 96 (2000) 215-228
69. Shankland T., and Ander M. Electrical conductivity, temperatures, and fluids in the lower crust. J. Geophys. Res. 88 B11 (1983) 9475-9484
70. Shen J., Sasaki Y., and Ushijima K. Reconstruction of resistivity and permittivity profiles using electromagnetic well logging data. Proc. World Geothermal Congress, Kyushu-Tohoku (2000) 1731-1736
71. Shmonov V.M., Vitovtova V.M., and Zharikov A.V. Fluid permeability of the earth crust rocks (in Russian) (2000), Scientific World, Moscow 276 pp.
72. Spichak V.V. Three-dimensional interpretation of MT data in volcanic environments (computer simulation). Ann. Geofis. 44 2 (2001) 273-286
73. Spichak V.V. Advanced three-dimensional interpretation technologies applied to the MT data in the Minamikayabe thermal area (Hokkaido, Japan). Expanded abstr. EAGE 64th Conference, Florence, Italy. (2002)
74. Spichak V.V., and Popova I.V. Artificial neural network inversion of MT - data in terms of 3D earth macro-parameters. Geophys. J. Int. 42 (2000) 15-26
75. Spichak V.V., Fukuoka K., Kobayashi T., Mogi T., Popova I., and Shima H. Neural - network based interpretation of insufficient and noisy MT data in terms of the target macro-parameters. Expanded abstr. II Symp. on 3D Electromagnetics, Salt Lake city, USA (1999) 297-300
76. Spichak V.V., Menvielle M., and Roussignol M. Three-dimensional inversion of MT data using Bayesian statistics. In: Spies B., and Oristaglio M. (Eds). 3D Electromagnetics, SEG monograph, GD7, Tulsa, USA (1999) 406-417
77. Spichak V., Rybin A., Batalev V., Sizov Yu., Zakharova O., and Goidina A. Application of ANN techniques to combined analysis of magnetotelluric and other geophysical data in the northern Tien Shan crustal area. Extended Abstract 18th IAGA WG 1.2 Workshop on Electromagnetic Induction in the Earth, El Vendrell, Spain (2006)
78. Spichak V.V., Borisova V.P., Fainberg E.B., Khalezov A.A., and Goidina A.G. Electromagnetic 3D tomography of the Elbrus volcanic center according to magnetotelluric and satellite data. J. Volcanol. Seismol. 1 1 (2007) 53-66
79. Spichak V.V., Schwartz Ya., and Nurmukhamedov A. Conceptual model of the Mutnovsky geothermal deposit (Kamchatka) based on electromagnetic, gravity and magnetic data. Expanded abstr. EAGE Workshop on Innovation in EM, Gravity and Magnetic methods: a new perspective for exploration, Capri, Italy (2007)
80. Spichak V.V., Zakharova O.K., and Rybin A.K. Estimation of the sub-surface temperature by means of magnetotelluric sounding. Expanded abstr. XXXII Workshop on Geothermal Reservoir Engineering, Stanford University, Stanford, USA (2007)
81. Srodon J. Nature of mixed-layer clays and mechanisms of their formation and alteration. Annu. Rev. Earth Planet. Sci. 27 (1999) 19-53
82. Suharno S., Browne P.R.L., Soengkono S., Prijanto, and Sudarman S. A geophysical model and the subsurface geology at the Ulubelu geothermal area, Lampung, Indonesia. Abstract. AAPG Bulletin vol. 84 (2000) 1498
83. Svetov B. Seismoelectric methods of Earth study. In: Spichak V.V. (Ed). Electromagnetic Sounding of the Earth's Interior (2006), Elsevier, Amsterdam 79-101
84. Takasugi S., Tanaka K., Kawakami N., and Muramatsu S. High spatial resolution of the resistivity structure revealed by a dense network MT measurement - a case study in the Minamikayabe Area, Hokkaido, Japan. Geomagn. Geoelectr. 44 (1992) 289-308
85. Talebi B., Khosrawi K., and Ussher G. Review of resistivity surveys from the NW Sabalan geothermal field, Iran. Proc. World Geothermal Congress, Antalia, Turkey (2005)
86. Uchida T. Resistivity structure of Sumikawa geothermal field, northeastern Japan, obtained from magnetotelluric data. Proc. World Geothermal Congress, Florence, Italy (1995) 921-925
87. Uchida T. Three-dimensional magnetotelluric investigation in geothermal fields in Japan and Indonesia. Proc. World Geothermal Congress, Antalia, Turkey (2005)
88. Uchida T., Ogawa Y., Takakura S., and Mitsuhata Y. Geoelectrical investigation of the Kakkonda geothermal field, northern Japan. Proc. World Geothermal Congress, Kyushu-Tohoku, Japan (2000) 1893-1898
89. Uchida T., Song Y., Lee T.J., Mitsuhata Y., Lim S.K., and Lee S.K. Magnetotelluric survey in an extremely noisy environment at the Pohang low-enthalpy geothermal area, Korea. Proc. World Geothermal Congress, Antalia, Turkey (2005)
90. Ushijima K., Noritomi K., Tagomori K., and Kinoshita Y. Joint inversion of MT and DC resistivity data at Hatchobaru area. Geotherm. Resour. Council Trans. 10 (1986) 243-246
91. Ushijima K., Mustopa E.J., Jotaki H., and Mizunaga H. Magnetotelluric soundings in the Takigami geothermal Aria, Japan. Proc. World Geothermal Congress, Antalia, Turkey (2005)
92. Ussher G., Harvey C., Johnstone R., and Anderson E. Understanding the resistivities observed in geothermal systems. Proc. World Geothermal Congress, Kyushu-Tohoku, Japan (2000) 1915-1920
93. Varentsov Iv.M. Arrays of simultaneous electromagnetic soundings: design, data processing and analysis. In: Spichak V.V. (Ed). Electromagnetic Sounding of the Earth's Interior (2006), Elsevier, Amsterdam 259-273
94. Veeraswamy K., and Harinarayana T. Electrical signatures due to thermal anomalies along mobile belts reactivated by the trail and outburst of mantle plume: evidences from the Indian subcontinent. J. Appl. Geophys. 58 4 (2006) 313-320
95. Volpi G., Manzella A., and Fiordelisi A. Investigation of geothermal structures by magnetotellurics (MT): an example from the Mt. Amiata area, Italy. Geothermics 32 (2003) 131-145
96. Wannamaker P.E. Electrical conductivity of water-undersaturated crustal melting. J. Geophys. Res. 91 B6 (1986) 6321-6327
97. Wannamaker P.E. Tensor CSAMT survey over the Sulphur Springs thermal area, Valles Caldera, New Mexico, U.S.A, Part I: Implications for structure of the western caldera. Geophysics 62 (1997) 451-465
98. Wannamaker P.E. Tensor CSAMT survey over the Sulphur Springs thermal area, Valles Caldera, New Mexico, U.S.A, Part II: Implications for CSAMT methodology. Geophysics 62 (1997) 466-476
99. Wannamaker P.E., Jiracek G.R., Stodt J.A., Caldwell T.G., Gonzales V.M., McKnight J.D., and Porter A.D. Fluid generation and pathways beneath an active compressional orogen, the New Zealand southern Alps, inferred from magnetotelluric data. J. Geophys. Res. 107 6 (2002) 6-1 - 6-22
100. Wannamaker P.E., Rose P.E., Doemer W.M., McCulloch J., and Nurse K. Magnetotelluric surveying and monitoring at the Coso geothermal area, California. Support of the Enhanced Geothermal Systems Concept: Survey Parameters, Initial Results. Proc. World Geothermal Congress, Antalia, Turkey (2005)
101. Ward S.H. Resistivity and induced polarization methods. In: Ward S.H. (Ed). Geotechnical and environmental geophysics, vol. 1 - Review and tutorial, Soc. Explor. Geophys (1990) 147-189
102. Waxman M.H., and Smith J.M. Electrical conductivities in oil-bearing shaley sands. Soc. Pet. Eng. J. (1968) 102-122 SPE Paper 1863-A at SPE Ann. Fall Meeting, Houston
103. Yamane K., Ohsatu K., Ohminato T., and Kim H.J. Three-dimensional magnetotelluric investigation in Kakkonda geothermal area, Japan. Proc. World Geothermal Congress, Kyushu-Tohoku, Japan (2000) 1965-1968
104. Yang K., Huntington J.F., Browne P.R.L., and Ma C. An infrared spectral reflectance study of hydrothermal alteration minerals from the Te Mihi sector of the Wairakei geothermal system, New Zealand. Geothermics 29 (2000) 377-392
105. Yang K., Browne P.R.L., Huntington J.F., and Walshe J.L. Characterising the hydrothermal alteration of the Broadlands-Ohaaki geothermal system, New Zealand, using short-wave infrared spectroscopy. J. Volcanol. Geotherm. Res. 106 (2001) 53-65
106. Zhang S., Paterson M.S., and Cox S.F. Porosity and permeability evolution during hot isostatic pressing of calcite aggregates. J. Geoph. Res. 99 (1994) 15741-15760
107. Zlotnicki J., Vargemezis G., Mille A., Bruere F., and Hammouya G. State of the hydrothermal activity of Soufriere of Guadeloupe volcano inferred by VLF surveys. J. Appl. Geophys. 58 4 (2006) 265-279