Minor- and trace-element distributions in the Bonneterre Dolomite (Cambrian), southeast Missouri: Evidence for possible multiple-basin fluid sources and pathways during lead-zinc mineralization

Gregg, Jay M.; Shelton, Kevin L.

doi:10.1130/0016-7606(1989)101<0221:matedi>2.3.co;2

Cited by 57 publications

(35 citation statements)

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“…Citing the studies of Buelter (1985) and Buelter and Guillemette (1988) as a starting point, Gregg and Shelton (1989) analyzed samples of replacement dolomite taken at the LamotteBonneterre contact in 35 drill cores covering an area of more than 25,000 km 2 west of the St. Francois Mountains. They found distinct regional trends in Fe, Mn, and Sr contents of the dolomite from values of 3.47 wt % Fe, 0.38 wt % Mn, and 27 ppm Sr, in the south, to 0.82 wt % Fe, 0.12 wt % Mn,and 54 ppm Sr, in the north.…”

Section: Trace and Minor Element Studiesmentioning

confidence: 99%

“…In and near Ramage (1984; also Ramage and Holland, 1984). Based on fractionation of minor and trace elements between fluids and dolomites, the data of Gregg and Shelton (1989) are interpreted to indicate a regional south-to-north flow of water from the Arkoma Basin, through the Lamotte Sandstone (Fig. 5) Gregg and Shelton ( 1989).…”

Section: Trace and Minor Element Studiesmentioning

confidence: 99%

“…Based on fractionation of minor and trace elements between fluids and dolomites, the data of Gregg and Shelton (1989) are interpreted to indicate a regional south-to-north flow of water from the Arkoma Basin, through the Lamotte Sandstone (Fig. 5) Gregg and Shelton ( 1989). cement in the Viburnum Trend and may have been active during the earlier precipitation of dolomite at the Lamotte-Bonneterre contact (Gregg and Shelton, 1989).…”

Section: Trace and Minor Element Studiesmentioning

confidence: 99%

“…Bethke et al, 1988;Gregg and Shelton, 1989) indicate that MVT mineralization is the result of a complex interrelationship of regional tectonics, which affect the timing and pathways of sedimentary basin dewatering, and local subsurface geochemical conditions. Thus, the study of MVT mineralization can provide important information about the timing and pathways of basin fluid migration (including petroleum) and burial diagenesis of carbonate reservoir rocks, in addition to the more obvious application to exploration for base metals in sedimentary provinces.…”

Section: Introductionmentioning

confidence: 99%

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Geochemical and petrographic evidence for fluid sources and pathways during dolomitization and lead-zinc mineralization in southeast Missouri: A review

Gregg

Shelton

1989

Carbonates Evaporites

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Regional geological studies in southeastern Missouri have made a significant contribution to knowledge of the origin of Mississippi Valley-type mineralization and the late diagenetic history of sedimentary rocks throughout this part of the Midcontinent. In addition to mineral exploration, investigations such as these provide insights into basinal processes such as migration and distribution of petroleum, dolomitization, and porosity modification of carbonate petroleum reservoir rocks.Cathodoluminescent microstratigraphies of epigenetic dolomite cements indicate that mineralizing basinal fluids altered carbonate rocks over a much larger area than was affected by sulfide mineralization. Trace element distributions in southeast Missouri also indicate that sedimentary rocks, over a large region, were altered by basinal fluids from both a southern (Arkoma Basin) and a northern or northeastern (possibly the Illinois Basin) source.Fluid inclusions in sphalerites and dolomites throughout southern Missouri and northern Arkansas indicate that mineralizing basinal brines were very saline (-16 wt % equiv. NaCI] and warm (_80°to 150°C). The lack of discernible thermal gradients in fluid inclusion temperatures from regionally extensive epigenetic dolomites and the range of fluid inclusion salinities indicate that more than one basinal fluid was involved in dolomitization and associated Pb-Zn ore deposition.Carbon and oxygen isotope compositions of dolomites show that basinal fluids evolved in chemical compositions with time and indicate interactions of fluids from at least two sources. Studies of strontium compositions of dolomite cements south and east of the Viburnum Trend subdistrict provide further evidence of an Arkoma-Ouachita source of one of these fluids. Lead isotope compositions of galenas, however, indicate multiple sources: I) the Illinois Basin, 2) the Arkoma Basin, 3) and the underlying local granitic basement. Distinct northern and southern basinal sources are postulated for sulfur based on sulfur isotope data from galenas.Taken as a whole, available geochemical and petrographic evidence indicate that dolomitization and Pb-Zn mineralization in southeast Missouri were the result of a more complex, multiplebasin fluid interaction than previously recognized.

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Section: Trace and Minor Element Studiesmentioning

confidence: 99%

Section: Trace and Minor Element Studiesmentioning

confidence: 99%

Section: Trace and Minor Element Studiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Geochemical and petrographic evidence for fluid sources and pathways during dolomitization and lead-zinc mineralization in southeast Missouri: A review

Gregg

Shelton

1989

Carbonates Evaporites

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“…The precipitation of these individual zones alternated with periods of widespread karsting, dissolution-brecciation and porosity formation, and precipitation of different stages of sulfide mineralization. The papers by Gregg and Shelton, Farr, and Voss and others are particularly important because they suggest possible sources of the fluids responsible for regional alteration of the Bonneterre (also see Gregg and .Shelton, 1989). These papers also document the relationships between subsurface diagenesis and fluid hydrologic systems affecting carbonate rocks on a regional scale, an aspect of research that can be applied to sedimentary basins elsewhere in the world.…”

mentioning

confidence: 99%