Ion-microprobe dating of zircon from quartz-graphite veins at the Bristol, New Hampshire, metamorphic hot spot

Journal Article · Sun Jul 01 00:00:00 EDT 1990 · Geology; (USA)

DOI:https://doi.org/10.1130/0091-7613(1990)018<0626:IMDOZF>2.3.CO;2· OSTI ID:6288542

Zeitler, P K ^[1]; Barreiro, B; Chamberlain, C P ^[2]; Rumble, D III ^[3]

---

1. Australian National Univ., Canberra (Australia)
2. Dartmouth College, Hanover, NH (USA)
3. Geophysical Laboratory, Washington, DC (USA)

Detrital zircons entrained in hydrothermal quartz-graphite-rutile veins found near the Bristol, New Hampshire, metamorphic hot spot are overgrown by thin rims. Ion-microprobe analyses of these rims date their growth at 408 {plus minus} 6 Ma. These measurements quantitatively confirm textural evidence that the graphite veins were emplaced during peak metamorphism associated with the Acadian orogeny, and they provide a direct positive test of the hypothesis, based on petrological and stable-isotope evidence, that the hydrothermal systems responsible for the quartz-graphite veins were also responsible for the hot-spot metamorphism.

• OSTI ID: 6288542
• Journal Information: Geology; (USA), Vol. 18:7; ISSN 0091-7613
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
GEOLOGIC DEPOSITS
AGE ESTIMATION
HYDROTHERMAL SYSTEMS
NEW HAMPSHIRE
DEPOSITION
ELECTRON MICROPROBE ANALYSIS
GEOLOGIC MODELS
GRANULITES
GRAPHITE
HYDROTHERMAL ALTERATION
METAMORPHIC ROCKS
METAMORPHISM
OROGENESIS
RUTILE
TEXTURE
ZIRCON
CARBON
CHALCOGENIDES
CHEMICAL ANALYSIS
ELEMENTAL MINERALS
ELEMENTS
ENERGY SYSTEMS
FEDERAL REGION I
GEOTHERMAL SYSTEMS
MATERIALS
MICROANALYSIS
MINERALS
NONMETALS
NORTH AMERICA
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
RADIOACTIVE MATERIALS
RADIOACTIVE MINERALS
ROCKS
SILICATE MINERALS
SILICATES
SILICON COMPOUNDS
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
USA
ZIRCONIUM COMPOUNDS
ZIRCONIUM SILICATES
150200* - Geology &amp; Hydrology of Geothermal Systems