Gangue mineral 87 Sr/ 86 Sr ratios and the origin of mississippi valley-type mineralization

Kessen, K. M.; Woodruff, M. S.; Grant, Norman K.

doi:10.2113/gsecongeo.76.4.913

Cited by 65 publications

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“…KESSEN et al (1981) pointed out that Mississippi Valley-type ore fluids in Illinois, Kentucky, Tennessee and Virginia had access to Sr reservoirs with increased time-integrated Rb/Sr ratios in the course of proceeding mineralization. LANGE et aL (1983) stated variability of the Sr isotopic composition of the mineralizing fluids from the Mississippi Valley-type ore deposits in southeast Missouri with increased 87Sr/~6Sr ratios at the late stage of ore deposition.…”

Section: Schwarzwaldmentioning

confidence: 99%

Strontium isotope systematics of hydrothermal vein minerals in deposits of West Germany

Baumann¹,

Hofmann²

1988

Geol Rundsch

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ZusammenfassungGangminerale im kristallinen Grundgebirge und in pal~io-zoischen und mesozoischen Sedimentgesteinen Westdeutschlands zeichnen sich durch szSr/~6Sr-Verh~iltnisse aus, die eine kontinentale Herkunft des Sr anzeigt. Weder Sr yore Erdmantel noch ein wesentlicher Beitrag dieses Elementes aus Meerwasser in den Mineralen (abgesehen von den Strontianiten des Miinsterlandes) kann aus den vorliegenden Daten abgeleitet werden.Gangminerale in Sedimentgesteinen haben sehr wahrscheinlich Sr aus tieferliegenden Sedimentgesteinsabfolgen eingebaut.Die Mineralisation yon G~ingen in Gesteinen des kristallihen Grundgebirges im Moldanubikum des Bayerischen Waldes ist auf den Zeitraum Perm-Trias beschr~inkt. Die *zSr/*6Sr-Verh~ilmisse umfassen eine relativ enge Spanne und spiegeln die zeitabh~ingige Isotopenzusammensetzung der umgebenden Gesteine und der des Untergrundes wider.G~inge im Schwarzwald durchschneiden kristallines Grundgebirge und setzen sich teilweise in mesozoisches Deckgebirge fort. Die Mineralisation erfolgte episodisch oder kontinuierlich vonder variszischen Orogenese bis ins Terti~ir. Die Mineralabfolgen der Schwarzwaldg~inge enthalten Sr mit einer zeitintegrierten Isotopenzusammensetzung, das sehr wahrscheinlich vorwiegend aus Gneisen stammt. AbstractVein minerals in West Germany hosted by crystalline basement rocks and Paleozoic and Mesozoic sedimentary rocks are characterized by 87Sr/S6Sr ratios which indicate continental derivation of Sr incorporated into the minerals. Neither mantle-derived Sr nor prominent contribution of this element from sea water (except for the strontianites of M~nsterland) can be substantiated by the data presented. R~sum~Les min~raux des filons hydrothermaux contenus dans le socle cristallin et dans les s~diments pal~ozoi'ques et m&ozoY-ques de l'Allemagne occidentale pr~sentent des rapports initianx STSr/86Sr qui indiquent une origine continentale du St. Les r~sultats pr~sent~s dans cette note ne permettent d'accepter ni une origine mantellique ni un apport ~ partir de l'eau de mer (~l l'exception des strontianites du Miinsterland).Les min&aux des veines contenues dans les roches s~dimen-taires doivent tr~s probablement leur Sr aux s&ies s~dimentai-res profondSment enfouies.La min~ralisation des veines contenues dans les roches cristallines moldanubiennes du Bayerische Wald date du PermoTrias. Les rapports initiaux embrassent un 8ventail relativement &roit qui traduit la composition isotopique, fonction du temps, des roches encaissantes.Les filons de la For& Noire, qul traversent le socle cristallin et se prolongent partiellement clans la couverture m~sozdi-que, se sont fo~m~s manifestement, par @isodes ou de mani&e continue, depuis I'orogen~se varisque jusqu'an Tertiaire. Leurs s~quences min~rales renferment du Sr de composition isotopique temporellement int~gr~e, qui provient principalement des gneiss.

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Section: Schwarzwaldmentioning

confidence: 99%

Strontium isotope systematics of hydrothermal vein minerals in deposits of West Germany

Baumann¹,

Hofmann²

1988

Geol Rundsch

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“…The potential use of this method in the study of ore genesis was recognized when Reesman (1968) reported that massive sulfide deposits can contain small but measurable amounts of Rb and Sr for strontium isotopic investigation. Kessen et al (1981) have made a general survey of the Sr isotopic composition of carbonates associated with some upper Mississippi Valley-type deposits. Our report presents preliminary results of the Rb-Sr isotope investigation of several sulfides and barites from the lead-barite district and of sulfides from Viburnum mine 27 in the Viburum Trend of Southeast Missouri.…”

Section: The Southeast Missouri Lead and Barite Deposits Associated Pmentioning

confidence: 99%

Strontium isotopic evidence for the origin of barites and sulfides from the mississippi valley-type ore deposits in southeast Missouri

Lange¹,

Chaudhuri²,

Clauer³

1983

Economic Geology

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Several barites from the lead-barite district in southeast Missouri contain between 1,170 and 1,688 ppm Sr. Their S7Sr/S6Sr ratios range from 0.7098 to 0.7118, in contrast to the values of 0.7082 to 0.7089 for the host carbonate rocks. The origin of barites is explained in terms of mixing of two isotopically and chemically different fluids. Four galenas from the Viburnum mine in Southeast Missouri provide a Rb-Sr age of 892 +_ 21 m.y. and an initial isotopic composition of 0.7104 +_ 0.0004, indicating the period of mineralization to be early Devonian. The Sr isotope data from a galena from the lead-barite district tend to indicate a similar age. Data from calcites in association with galenas from the Viburnum mine suggest that the Sr isotopic composition of the fluids varied appreciably during deposition of the ore.

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“…These gangue carbonates most likely represent later precipitates that partly replaced sulfide mineralization, as supported by macroscopic petrography (see above). It has been observed in this context that gangue carbonates in low-temperature MVT-style mineralization may evolve Sr-isotopically during an ore-forming event, with e.g., early precipitates reflecting the (low) Sr isotopic composition of the (carbonate) host rocks and later carbonate phases being progressively contaminated by more radiogenic (possibly siliciclastic-derived) mineralizing fluids (e.g., Kessen et al, 1981;Medford et al, 1983;Schneider et al, 2002).…”

Section: Interpretation Of Rb-sr Results For Tvilum and Børglummentioning

confidence: 99%

Timing and metal sources for carbonate-hosted Zn-Pb mineralization in the Franklinian Basin (North Greenland): Constraints from Rb-Sr and Pb isotopes

Rosa

Schneider

Chiaradia

2016

Ore Geology Reviews

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Gangue mineral 87 Sr/ 86 Sr ratios and the origin of mississippi valley-type mineralization

Cited by 65 publications

References 0 publications

Strontium isotope systematics of hydrothermal vein minerals in deposits of West Germany

Strontium isotope systematics of hydrothermal vein minerals in deposits of West Germany

Strontium isotopic evidence for the origin of barites and sulfides from the mississippi valley-type ore deposits in southeast Missouri

Timing and metal sources for carbonate-hosted Zn-Pb mineralization in the Franklinian Basin (North Greenland): Constraints from Rb-Sr and Pb isotopes

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