+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Stable isotope evidence for regional-scale fluid migration in a Barrovian metamorphic terrane, Vermont, USA



Stable isotope evidence for regional-scale fluid migration in a Barrovian metamorphic terrane, Vermont, USA



Contributions to Mineralogy and Petrology 112(4): 475-489



We measured the C- and O-isotopic composition of carbonate minerals in the Waits River Formation, eastern Vermont, to determine the extent of fluid infiltration during regional metamorphism over an approx. 2000 km2 area in a deep-seated (>25 km) Barrovian terrane. From a petrologic study of this terrane, Ferry proposed the existence of a large regional metamorphic hydrothermal system with two first-order features: (1) on the scale of the entire terrane fluid flow was focused into the axes of two major antiforms of regional extent; (2) on a smaller scale (about 100 km2) flow was further focused around synmetamorphic granitic plutons that intruded along the axes of the antiforms. We find isotopic evidence for both the regional hydrothermal activity along the antiforms and the more intense fluid flow around synmetamorphic plutons. The evidence for hydrothermal activity around the plutons is large heavy isotope depletions, up to 6–9‰ in 18Ocarb and 13Ccarb, in diopside zone rocks adjacent to the plutons. These isotopic shifts are greater than can be explained solely by prograde metamorphic reactions. We find two lines of evidence for the more diffuse regional flow that was focused into axes of the antiforms. First, 18Ocarb and 13Ccarb, within individual outcrops become increasingly homogeneous with increasing grade towards antiform axes, indicating that the rocks equilibrated with a permeating fluid. Second, there are depletions in 18O near the margins of the Waits River Formation which can be interpreted as a dispersed, advective infiltration front displaced toward the antiform axes. These fronts were modelled using Eq. 13 of Bickle and Baker and imply time-integrated fluid of 105–106 cm3/cm2, which are consistent with values derived by Ferry from measured progress of prograde devolatilization reactions.

Please choose payment method:






(PDF emailed within 0-6 h: $19.90)

Accession: 020085582

Download citation: RISBibTeXText

DOI: 10.1007/bf00310779


Related references

Stable isotopic evidence for regional-scale fluid migration in a Barrovian metamorphic terrane, Vermont, U.S.A. Abstracts with Programs - Geological Society of America 23(5): 335, 1991

Stable isotope evidence for large-scale influx of marine fluids into a regional metamorphic-anatectic terrane; the Trois Seigneurs Massif, Pyrenees, France. Eos, Transactions, American Geophysical Union 66(18): 391, 1985

The magnitude and three-dimensional geometry of regional-scale fluid flow during Barrovian metamorphism, southeastern Vermont, USA. Abstracts - Geological Society of Australia 67: 221, 2002

Stable isotopic evidence for large-scale seawater infiltration in a regional metamorphic terrane; the Trois Seigneurs Massif, Pyrenees, France. Contributions to Mineralogy and Petrology 91(2): 122-137, 1985

Three-dimensional geometry of metamorphic fluid flow during Barrovian regional metamorphism from an inversion of combined petrologic and stable isotopic data. Geology (Boulder) 30(7): 639-642, 2002

Sulfur and oxygen isotope study of the Vermont copper belt; evidence of seawater hydrothermal alteration and sulfate reduction in a high-grade metamorphic terrane. Abstracts with Programs - Geological Society of America 17(7): 713, 1985

Textural and stable isotope development of marble assemblages during the Barrovian-style M2 metamorphic event, Naxos, Greece. U S, 1994

Stable isotope and textural evidence on the mechanisms of metamorphic fluid infiltration within a zone of structurally-focused high fluid flux. Mineralogical Magazine: A-K, Pages 187-188. 1994., 1994

Sulfur and oxygen isotope study of the Great Gossan Lead, southwestern Virginia; evidence for a paleohydrothermal system in a regional metamorphic terrane. Abstracts with Programs - Geological Society of America 16(6): 701, 1984

Regional-scale excess Ar wave in a Barrovian type metamorphic belt, eastern Tibetan Plateau. Island Arc 18.2, 2009

The stable isotope signature of kilometre-scale fracture-dominated metamorphic fluid pathways, Mary Kathleen, Australia. Journal of Metamorphic Geology 11(5): 705-720, 1993

Fluid inclusion and stable isotope analyses of veins from the central Appalachian Valley and Ridge Province; implications for regional synorogenic hydrologic structure and fluid migration. Geological Society of America Bulletin 111(12): 1841-1860, 1999

Discussion on the possible contribution of metamorphic water to the mineralizing fluid of Southwest England; preliminary stable isotope evidence. Proceedings of the Ussher Society 6(2): 224-228, 1985

Deep burial fluid migration in the Upper Cambrian Nolichucky Formation; stable isotope and fluid inclusion evidence from tectonic calcite veins. Abstracts with Programs - Geological Society of America 22(4): 14-15, 1990

Retrograde fluids in granulites; stable isotope evidence of fluid migration. Journal of Geology 99(4): 559-570, 1991