 | | Journal (article/letter/editorial) | | Colorado River delta in the Cerro Prieto geothermal system, Baja California, Mexico PETER SCHIFFMAN, 1'2 DENNIS...AND WILFRED A . ELDERS ~ ABSTRACT. The Cerro Prieto geothermal system provides a unique opportunity for...are presented for these minerals which include wairakite, epidote, prehnite, actinolite, clinopyroxene...material in Cerro Prieto sandstones. KEYWORDS: sandstones, geothermal system, wairakite, epidote, prehnite...clinopyroxene, biotite, sphene, garnet, microcline, Cerro Prieto, Mexico. IN recent years, mineralogical and geochemical |  | Bird, Dennis K., Schiffman, Peter, Elders, Wilfred A., Williams, Alan E., McDowell, S. Douglas (1984) Calc-silicate mineralization in active geothermal systems. Economic Geology, 79 (4) 671-695 doi:10.2113/gsecongeo.79.4.671 | Journal (article/letter/editorial) | | Departmentof Geology,StanfordUniversity,Stanford,California 94305 PETERSCHIFFMAN,* WILFRED A. ELDERS,ALAN...Geophysics and PlanetaryPhysics,Universityof California,Riverside,California92521 AND S. DOUGLAS McDOWELL...mostcommonmetasomatic calc-silicates in geothermal systems areheulandite, laumontite,wairakite,prehnite,epidote,garnet...Alkalis substitutefor calciumin heulanditeand wairakite, and there is considerable octahedralsubstitution...disappearanceof one or more of the phasescalcite,prehnite,wairakite,or biotite. From the available datathereisnootherobvious |  | | Book (volume) | | ECONOMIC GEOLOGY, MEXICO The Geology of North America O r > W 4^ *1^ ^ ^ \ \ f ax4 u \ \...of North America Volume P-3 Economic Geology^ Mexico Edited by Guillermo P. Salas Geologo Consultor...Centro Minero Nacional Carretera Mexico-Pachuca Pachuca, Hgo., Mexico, D.F. 1991 EXPLORATION LIBRARY...LIBRARY UNION OIL CO. OF CALIFORNIA P. O. BOX 4570 HOUSTON, TEXAS 77210-4570 1 Acknowledgment Publication...Oil Company Texaco, Inc. Union Oil Company of California Union Pacific Corporation and its operating companies: |  | | Journal (article/letter/editorial) | | Hydrothermal Systems: The Case of Los Azufres Geothermal Field, Mexico Ignacio S. Torres-Alvarado a a Universidad...Universidad Nacional Autonoma de Mexico Published online: 14 Jul 2010. To cite this article: Ignacio S...Hydrothermal Systems: The Case of Los Azufres Geothermal Field, Mexico, International Geology Review, 44:7, 639-652...Hydrothermal Systems: The Case of Los Azufres Geothermal Field, Mexico IGNACIO S. TORRES-ALVARADO1 Centro de...mineralogical information related to the Los Azufres geothermal field, along with new isotopic data from hydrothermal |  | | Journal (article/letter/editorial) | | solution geothermometer The Los Azufres (Mexico) geothermal system Michel Cathelineau 1 and David Nieva...Electricas, Apartado Postal 475, Cuernavaca, Morelos, Mexico Abstract. Chlorite constitutes a major hydrothermal...metamorphism of andesites, in the active geothermal system of Los Azufres (Mexico). Electron microprobe analyses...significantly in the studied field (composition of the host rocks, nature of the geothermal fluids, pressure, ...metamorphism (especially in greenschist facies), in geothermal fields (Tomasson and Kristmannsdottir 1972; McDowell |  | | Journal (article/letter/editorial) | | alteration. Rhyolitic lava flows encountered ture geothermal systems carry “appreciable concenby Y- I3 drill...subalkaline rhyolites from Nevada and eastern California. Studies by J. J. RYTUBA (oral commun.. 198 I)...series of Cs for Na forms the calcium analogue. wairakite (SIJRDAM. 1966: TAKEUCHI efal..1979). Pollucite...gives an analysis of wairakite containing 170 ppm C$O from the Wairakei geothermal field, New Zealand, thus...rhyolitic reservoir rock. At Cerro Prieto Geothermal Field, Baja California, Mexico, the hydrothermal system |  | | Journal (article/letter/editorial) | | composition with a tendency to extend into the field of sub-calcic augite (Table 1, analyses 10 and 11)...trends of iron enrichment eventually reaching the field of ferroaugite (Table 1, analyses 13 to 15); these...the same sample have compositions falling in the field of anorthoclase (Table 1, analysis 6) and sanidine...hornblende and magnesio-hornblende (close to the field of ferro-hornblende) in the Mg/(Mg + Fe) versus...(Evarts & Schiffman, 1983), of the Reydarfjordur geothermal system, Eastern Iceland (Viereck, Griffin, Schmincke |  | | Report (volume) | | the last years from several working groups in the field of experimental studies and spectroscopic work....the epdiote minerals, from low temperature in geothermal fields (Chapter 6, Bird and Spieler), to common...unpublished results), and in hydrothermal epidote from geothermal fields (Bird and Spieler 2004), and might in...clinozoisite from a hydrothermal quartz vein (Baja California; sample # 81/370, Fig. 15a-d; see also back...a hydrothermal quartz vein (sample 81-270, Baja California). (a) Outer part of a radially grown aggregate |  | | Report (volume) | | zeolitic tuffs. The authors reported findings of field, laboratory, and theoretical investigations dealing...equilibria and dissolution kinetics, mapping and field relations, and trace element geochemistry. The concurrent...Seasonal diagenetic changes in salts of Owens Lake, California, 1970-77, by George I. Smith and Irving Friedman...outer continental-shelf sediments from the Gulf of Mexico, by Lorraine H. Filipek 31 Mobility and distribution...grade, and temperature in the Cerro Prieto, Salton Sea, and East Mesa geothermal systems, Salton Trough, United |  | | Journal (article/letter/editorial) | | lower Yw~ahes and higher silica activities. In geothermal systems dissolved silica activities generally...clay minerals over sodium clay phases in most geothermal alteration assemblages; secondary processes,...bound to move down into the feldspar stability field, while inco~mtion of an alkali feldspar into a solid...(4) and ~~~~i~e In Fig. 2 the stability of geothermal mineral phases is given in terms of A&, = log...silica thus explaining their general absence from geothermal alteration assemblages. Two minerals, talc and |  | | Report (volume) | | Colorado-Federal Center, Bldg. 810 • MENLO PARK, California-Bldg. 3, Rm. 3128, 345 Middlefield Rd. Subscriptions...hydrothermal and fumarolic minerals from outcrops and geothermal drill holes near Mount Hood, Oregon UNITED STATES............................................. . Wairakite ................................................Hydrothermal Minerals in Selected Mount Hood Geothermal Drill Holes....................................... B. Hydrothermal Minerals Identified from Geothermal Drill Holes and Outcrops in the Mount Hood Area |  | | Journal (article/letter/editorial) | | Department of Geology, Stanford University, Stanford, California 94305, USA ABSTRACT. The system Na20-CaO MgO...been recorded in low-T recrystallization and in geothermal systems (Coomb et al., 1977; Schiffman, pets...Ca-zeolites (stilbite, heulandite, laumontite, and wairakite), prehnite, zoisite-epidote, lawsonite, pumpellyite...should have a minimum pressure limit, and its P - T field is commonly depicted as wedged-shaped, with an increasing...Ophiolite (Evarts and Sehif~man~ 1983) Cerro Prieto geothermal (Bird et al.~ 1984) Karmutsen Volcanics |  | | Journal (article/letter/editorial) | | Department of Geology, Stanford University, Stanford, California 94305 (Received 8 November 1982; in revisedform...rocks and in hydrothermal assemblages from active geothermal systems. They may occur together as common prehnite—pumpellyite...pumpellyite—actinolite facies and in altered rocks from many geothermal systems. 322 •)• G . L I O U ET AL. EXPERIMENTAL...ile some CuKJ°) ±0-012 from San Isido, Baja California, with composition C a j ^ e J . ^ A l i ^ F...with epidote and magnetite, occur only in the P-T field of a transition zone shown in Figs. 2-4. The experimental |  | | Report (issue) | | Survey 345 Middlefield Road MS/977 Menlo Park, California 94025 This report is preliminary and has not...petrographic investigations of core samples from geothermal prospect wells drilled by Unocal in the vicinity...was to investigate the interplay between the geothermal system and the active fault zone. Specific topics...considered can be separated into two general groups: Geothermal Research Changes in mineralogy with location...rocks may be the local reservoir rock for the geothermal systems. Some granitic and hornfelsic intrusions |  | | Book | | muscovite in 1 M-2 M polytype stabilities 2.6.4 Field evidence 2.6.5 Factors affecting the illite 1 Md-2M...metamorphism 3.11.2 Hydrothermal metamorphism in geothermal systems 3.11.3 Burial metamorphism 3.11.4 Thermal...Illitization and chloritization of smectite in geothermal areas and under the influence of high thermal...three possible ways of passing through the P-T field of very low-grade metamorphism (Figure 1.1). {A)...and mineralogical imprint can be correlated on field evidence with stratigraphically (or tectonically) |  | | Report (volume) | | Spring oil field: Col 7, “Freeman (1979)” should be under “References”, Col 8 3. Tejon oil field: Col 7,...8 9. Col 1, Yufutsu gas field region should read “Yufutsu oil and gas field region” [Similar correction...in each chapter. David L. Bish Los Alamos, New Mexico 1529-6466/01/0045-0000$10.00 September 1, 2001...FOUR-MEMBERED RINGS AND RELATED STRUCTURES Analcime, wairakite, pollucite, leucite, ammonioleucite, hsianghualite.... .. . . .. . . . ..... . ..... ... . ....78 Wairakite: Ca8[Al16Si32096]·16H20 ............... ..... |  | | Book | | problem is greatly increased by the very active field of laboratory zeolite synthesis, which in many cases...diagenetic series, continental and marine sediments, geothermal fields. These clay resources have been exploited...cases it is necessary to introduce the concept of field water capacity of soils. Soils are able to hold...move downwards: this amount of water is called the field capacity and it is available for plant growth or...the variations of the volume of water held at the field capacity and the amount of drainage. Two major soil |  | | Report (issue) | | _______________________________ Laboratory and field analytical techniques ________ Oil and gas resources...Plains _______ Great Basin and California ____________ Gulf of Mexico and Florida _______________ Appalachian...Nuclear-fuel resources _____________________ Geothermal resources _____________________ Regional geologic...region Oregon Western United States Washington California Alaska Statewide Northern West-central East-central...Montana _______________________ Montana ____ New Mexico _ North Dakota Oklahoma _ South Dakota Texas ______ |  | | Report (volume) | | _______________________________ Laboratory and field analytical techniques ________ Oil and gas resources...Plains _______ Great Basin and California ____________ Gulf of Mexico and Florida _______________ Appalachian...Nuclear-fuel resources _____________________ Geothermal resources _____________________ Regional geologic...region Oregon Western United States Washington California Alaska Statewide Northern West-central East-central...Montana _______________________ Montana ____ New Mexico _ North Dakota Oklahoma _ South Dakota Texas ______ |  | | Book | | Measurements 3.2.1. Types of Sensor 3.2.2. Calibration of Field Sensors Measurements of Subsurface Temperatures...6.7. References 7. V. CERMAK and R. HAENEL / Geothermal Maps 7.1. Introduction 7.2. General Statements...of Individual Techniques 7.2.5. Corrections in Geothermal Mapping 7.3. Temperature, Temperature Gradient...Gradient 7.3.3. Maps of Heat-Flow Density 7.4. Geothermal Resource and Reserve Representation 7.4.1. Objectives...characteristics should we look for to define an economic geothermal resource? What is the best method for exploring |  | | Report (issue) | | of the Shimanto Belt began as two simultaneous field-based investigations of structural fabrics on the...University of Missouri as a logical outgrowth of the field work. Most of our initial objectives were rooted...additional field areas. As the project neared its completion, we benefited greatly from field trips and...the Shimanto Belt were affected by the Cenozoic geothermal regime of southwest Japan. This introductory...unambiguous and widespread evidence in favor of high geothermal gradients at rela¬ tively shallow depths. Furthermore |  | | Report (issue) | | Mountains and Great Plains ________ Great Basin and California ____________ Appalachian Basin and Florida __________...Nuclear-fuel resources ______________________ Geothermal resources _- — _____________ Regional geologic...—————————————— Pacific Coast region __ —— —————————————— California _____————————————————— Oregon ____————————————————————...___—————————__________ Nebraska ______________________ New Mexico __________________ North Dakota ___________________..._______________________ Arizona ______________________ California _____________________ Hawaii _______________________ |  | | Book | | D. Meinert, and R. J. Newberry 317 Active Geothermal Systems and Hydrothermal Ore Deposits. Donald...Geology and Geophysics, University of California, Berkeley, California 94720 Abstract The transfer of the...The Sulphide Queen orebody at Mountain Pass, California, also Precambrian in age, contains abundant cerium-group...metasomatism in examples such as West Shasta, California (Reed, 1977). Sericite and pyrophyllite, plus...of petroleum. The pos¬ sible importance of oil field brines as ore carriers, and of migrations of these |  | | Journal (article/letter/editorial) | | magnesites from the R u m Jungle U r a n i u m FieLd, Australia: implications for the origin of strata-bound...and Jeffrey, A.W.A., Gas changes in the Krafla geothermal system, Iceland A r m a n n s s o n , H., see...thermoluminescence dating with coastal sediments from northern California . . . . . . . . . . . . . . . . . . . . . . ...the Late Permian Delaware Basin evaporites (New Mexico, U . S . A . ) . . Brookins, D.G., see Ekambaram...arc-marginal basin system (Eastern Klamath Mountains, California, U.S.A.) . . . . . . . . . . . . . . . . . . |  | | Report (issue) | | and dickite, fine-grained dark gray colors. The field of view is approximately 1 mm in long dimension...histories can be revealed. This is accomplished via field relations, a variety of petrographic techniques...thin-section to the micrometer scale using combinations of field, petrographic, x-ray diffraction (XRD), infrared...fluid evolution of a sedimentary basin. Process Field Observations Result Structure of basin Possible...stratigraphic record of crustal blocks in the eastern California Coast Ranges: evidence for long-lived and reactivated |
|
