Origin of ore fluids in the Muruntau gold system: Constraints from noble gas, carbon isotope and halogen data   总被引：6，自引：0，他引：6  

Torsten Graupner  Samuel Niedermann  Reiner Klemd  Achim Bechtel 《Geochimica et cosmochimica acta》2006,70(21):5356-5370

Hydrothermal vein minerals directly associated with native gold mineralization in the Muruntau vein system (Uzbekistan) have been studied for noble gas, carbon isotope and halogen chemistry of the trapped ore-related fluids. Helium trapped in early arsenopyrite 1, which has preserved the original fluid signature better than associated scheelite and quartz, indicates a small input from a mantle source (?5% of total He). However, the overwhelming majority of the He in the fluid (∼95%) is from crustal sources. The noble gases Ne, Kr and Xe in the sample fluids are dominated by gases of atmospheric origin. The carbon isotope (δ¹³C: −2.1‰ to −5.3‰) and halogen characteristics of the fluids (log Br/Cl: −2.64 to −3.23) lend further support for the activity of juvenile fluids during the main ore stage. The high proportion of crustal components in the ore-forming fluids may be explained by intense fluid-rock interaction and is also supported by previous Nd and Sr isotope studies. The involvement of a juvenile fluid component during the main stage of hydrothermal activity at Muruntau (∼275 Ma) can be linked to the emplacement of lamprophyric dikes at Muruntau, due to apparently overlapping ages for high-temperature alteration, related ore vein formation and intrusion of the dikes. The input of mantle-derived fluids, possibly related to the Hercynian collisional event in the western Tien Shan, stimulated intense fluid-rock interaction in the crust. In this context, the mantle-derived fluid should be considered as one possible carrier of metals. Significant amounts of external meteoric fluids circulating in fracture systems are interpreted to have modified the noble gas signature of fluid in quartz, mostly during late, low temperature fluid circulation.  相似文献   

IGGOS as a potential partner in IGOS     

Philip L. Woodworth  Thorkild Aarup  Reiner Rummel 《Journal of Geodynamics》2005,40(4-5):432

This short note reviews our thinking on how IGGOS can best achieve a high status within the set of global monitoring programmes. If such a high status can be obtained, then the importance of geodetic networks and services will be recognized more widely, and their activities will consequently be better resourced in the long term. One particular aspect concerns how IGGOS can complement the roles of the various IGOS partners within global monitoring. The different ways in which IGGOS can contribute to IGOS are outlined.  相似文献   

P-T evolution and fluid inclusion characteristics of retrograded eclogites,Münchberg Gneiss Complex,Germany     

Reiner Klemd 《Contributions to Mineralogy and Petrology》1989,102(2):221-229

Kyanite eclogites occur as part of the Münchberger nappe pile in NE-Bavaria, West Germany. Eclogites are overprinted by subsequent amphibolite facies metamorphism. The preservation of primary eclogitic textures as well as symplectitic textures are indicative of rapid decompression. Eclogite formation is estimated to have occurred under conditions of high H₂O-activities at pressures between 20 and 26 kbar and temperatures ranging between 590 and 660° C, as is shown by the coexistence of omphacite (Jd 50), kyanite, zoisite and quartz. Minimum pressure estimates, independent of the water activity, range between 9 and 16 kbar at the relevant temperatures. Detailed studies of fluid inclusion reveal two predominant groups of aqueous-brine inclusions: high salinity (14–17 wt% NaCl equiv.) and low salinity (0–8 wt% NaCl equiv.) inclusions. Fluid compositions of both groups of inclusions yield isochores passing close to the estimated amphibolite facies PT-field. The compositions of these fluids are in good agreement with fluid compositions considered from mineral equilibria. None of the fluid inclusions has densities appropriate for eclogite facies metamorphism, but probably reflect later amphibolite facies metamorphism.  相似文献   

V. FRANZISKUS: Sanierung kontaminierter Standorte 1989 - Abfallwirtschaft in Forschung und Praxis,Bd. 33. Berlin,E. Schmidt Verlag, 1990, 442 S., 109 Abb., 21 Tab., DM 78,-, ISBN 3-503-02899-4     

W. Rummel 《洁净——土壤、空气、水》1991,19(2):244-244

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MOORE,J. W., und S. RAMAMOORTHY: Heavy Metals in Natural Waters. New York,Springer- Verlag, 1884, 268 S., 48 Abb., 84 Tab., 40.30 Dollar     

W. Rummel 《洁净——土壤、空气、水》1985,13(2):148-148

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H.-G. Egerter,G. Plötner,J. Dvorak und H. Jordan: Geochemische Beziehungen in Vogtländisch-Westböhmischen Mineralwässern. Abh. Sächs. Akad. Wiss. Leipzig,Math.-nat. Kl., Bd. 56 (1984) 1, 60 S., M 8,–     

W. Rummel 《洁净——土壤、空气、水》1987,15(5):486-486

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The rare alkalies in hydrothermal alteration at Wairakei and Broadlands,geothermal fields,N.Z.     

Reiner Goguel 《Geochimica et cosmochimica acta》1983,47(3):429-437

Drillcores and waters from Wairakei and Broadlands geothermal areas New Zealand have been analyzed for Li, Rb, Cs, Na, K, Mg, Ca, Al, Ti, Mn, and Be. The drillcores were altered to various degrees at temperatures below 300°C in slightly alkaline chloride water, probably derived from rock-water interaction in untapped horizons at higher temperature. It changes its composition as it leaches Ca and Na from the rock and adds K, Rb, Cs and Li. Evaluation of these changes in relation to the dimensions of the altered zone under observation suggests that a high mass ratio of water to rock (e.g., 100) and a period of up to 1 million years are responsible for the present stage of alteration.Increase of K and Rb in the altered rocks is a result of the formation of abundant adularia in addition to illite. The $\text{K}\text{Rb}$ ratio of the rock decreases during alteration but remains higher than that of the fluid. Only clay materials and zeolites that preferentially absorb Rb give slightly lower $\text{K}\text{Rb}$ ratios than the fluid.The mineral phases responsible for the uptake of lithium during alteration are chlorite (300 ppm Li) and quartz (up to 430 ppm Li). Li uptake in quartz is considered to be the mechanism by which Al-rich quartz crystallises from alumino-silicates. $\text{Li}\text{Al}$ atomic ratios of 0.3–0.57 and Al concentrations up to 3000 ppm have been observed.Relatively small concentrations of Cs are found in potassic minerals (e.g. 10 ppm Cs in adularia, 44 ppm Cs in illite). However, 240 ppm Cs are found in wairakite from Wairakei equilibrated at 235°C. Lower equilibration temperatures may lead to higher cesium concentrations. This effect, in conjunction with a more concentrated hydrothermal fluid, could explain a content of 4500 ppm Cs in wairakite extracted from a drillcore taken in the El-Tatio geothermal field in Chile.  相似文献   

Spectral analysis of the full gravity tensor   总被引：9，自引：0，他引：9  

R. Rummel  M. van  Gelderen 《Geophysical Journal International》1992,111(1):159-169

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Solar radiation extinction,sky radiation,sky light polarization and aerosol particle total number and size distribution on the Island Maui (Hawaii)     

Kurt Bullrich  Reiner Eiden  Ruprecht Jaenicke  Wolfram Nowak 《Pure and Applied Geophysics》1968,69(1):280-319

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Tagungsbericht des Fachverbandes Wasserchemie 1975 in Reinhardsbrunn     

W. Rummel 《洁净——土壤、空气、水》1976,4(4):394-395

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