Impact‐induced hydrothermal activity within the Haughton impact structure, arctic Canada: Generation of a transient, warm, wet oasis

Field studies and analytical scanning electron microscopy indicate that a hydrothermal system was created by the interaction of water with hot, impact-generated rocks following formation of the 24 km diameter, 23 Ma Haughton impact structure. Hydrothermal alteration is recognized in two settings: within polymict impact breccias overlying the central portion of the structure, and within localized pipes in impact-generated concentric fault systems. The intra-breccia alteration comprises three varieties of cavity and fracture filling: (a) sulfide with carbonate, (b) sulfate, and (c) carbonate. These are accompanied by subordinate celestite, barite, fluorite, quartz and marcasite. Selenite is also developed, particularly in the lower levels of the impact breccia sheet. The fault- related hydrothermal alteration occurs in 1-7 m diameter subvertical pipes that are exposed for lengths of up 20 m. The pipes are defined by a monomict quartz-carbonate breccia showing pronounced Fe-hydroxide alteration. Associated sulfides include marcasite, pyrite and chalcopyrite. We propose three distinct stages in the evolution of the hydrothermal system: (1) Early Stage (>200 °C), with the precipitation of quartz (vapor phase dominated); (2) Main Stage (200-100 °C), with the development of a two-phase (vapor plus liquid) zone, leading to calcite, celestite, barite, marcasite and fluorite precipitation; and (3) Late Stage (<100 °C), with selenite and fibroferrite development through liquid phase-dominated precipitation. We estimate that it took several tens of thousands of years to cool below 50 °C following impact. During this time, Haughton supported a 14 km diameter crater lake and subsurface water system, providing a warmer, wetter niche relative to the surrounding terrain. The results reveal how understanding the internal structure of impact craters is necessary in order to determine their plumbing and cooling systems.

[1]  A. Eckstaller,et al.  Gravity and Magnetic Investigations in the Haughton Impact Structure, Devon Island, Canada , 1988 .

[2]  P. Robertson,et al.  Haughton impact structure: structural and morphological aspects , 1983 .

[3]  J. Murowchick.  Marcasite inversion and the petrographic determination of pyrite ancestry , 1992 .

[4]  R. Grieve,et al.  The Economic Potential of Terrestrial Impact Craters , 1994 .

[5]  C. Hibbitts,et al.  Impact crater lakes on Mars , 1996 .

[6]  R. Howie,et al.  Rock-forming minerals , 1962 .

[7]  C. Broman,et al.  IMPACT-RELATED HYDROTHERMAL ACTIVITY IN THE LOCKNE IMPACT STRUCTURE, JAMTLAND, SWEDEN , 1998 .

[8]  L. Hickey,et al.  The Stratigraphy, Sedimentology, and Fossils of the Haughton Formation: A Post-Impact Crater-Fill, Devon Island, N.W.T., Canada , 1988 .

[9]  T. Frisch,et al.  Haughton Astrobleme: A Mid-Cenozoic Impact Crater Devon Island, Canadian Arctic Archipelago , 1978 .

[10]  E. Jessberger.  40Ar-39Ar Dating of the Haughton Impact Structure , 1988 .

[11]  C. Barnosky,et al.  Fission-Track Dating of Haughton Astrobleme and Included Biota, Devon Island, Canada , 1987, Science.

[12]  W. P. Pratt.  Mississippi Valley–type lead-zinc deposits , 1984 .

[13]  H. Barnes,et al.  Marcasite precipitation from hydrothermal solutions , 1986 .

[14]  W. J. Phillips,et al.  Hydraulic fracturing and mineralization , 1972, Journal of the Geological Society.

[15]  H. Barnes,et al.  Geochemistry of Hydrothermal Ore Deposits , 1968 .

[16]  D. Stöffler,et al.  The Allochthonous Polymict Breccia Layer of the Haughton Impact Crater, Devon Island, Canada , 1988 .

[17]  D. Sverjensky.  Genesis of Mississippi Valley-type lead-zinc deposits , 1986 .

[18]  T. Frisch,et al.  Precambrian Successions in the Northernmost Part of the Canadian Shield , 1991 .

[19]  Martin A. A. Schoonen,et al.  Reactions forming pyrite and marcasite from solution: II. Via FeS precursors below 100°C , 1991 .

[20]  D. Nordstrom,et al.  Fluorite solubility equilibria in selected geothermal waters , 1977 .

[21]  T. Frisch.  Reconnaissance geology of the Precambrian Shield of Ellesmere, Devon and Coburg Islands, Arctic Archipelago: a preliminary account , 1983 .

[22]  D. Stöffler,et al.  Composition of the Crystalline Basement and Shock Metamorphism of Crystalline and Sedimentary Target Rocks at the Haughton Impact Crater, Devon Island, Canada , 1988 .

[23]  C. Allen,et al.  Hydrothermally altered impact melt rock and breccia: Contributions to the soil of Mars , 1982 .

[24]  D. Ames,et al.  Dating of a regional hydrothermal system induced by the 1850 Ma Sudbury impact event , 1998 .

[25]  M. Schoonen,et al.  Mechanisms of pyrite and marcasite formation from solution: III. Hydrothermal processes , 1991 .

[26]  K. Keil,et al.  Fluidization and hydrothermal alteration of the suevite deposit at the Ries Crater, West Germany, and implications for Mars , 1986 .

[27]  U. Schärer,et al.  A SEM-ATEM and stable isotope study of carbonates from the Haughton impact crater, Canada , 1994 .

[28]  Z. Hajnal,et al.  Seismic Signature of the Haughton Structure , 1988 .

[29]  P. Robertson,et al.  Shatter cones from Haughton Dome, Devon Island, Canada , 1975, Nature.

[30]  H. P. Trettin.  Geology of the Innuitian Orogen and Arctic Platform of Canada and Greenland , 1991 .

[31]  Keith Nicholson,et al.  Geothermal Fluids: Chemistry and Exploration Techniques , 1993 .

[32]  M. Schoonen,et al.  Reactions forming pyrite and marcasite from solution: I. Nucleation of FeS2 below 100°C , 1991 .

[33]  W. Giggenbach.  Equilibriums involving polysulfide ions in aqueous sulfide solutions up to 240.deg. , 1974 .

[34]  H. Newsom.  Hydrothermal alteration of impact melt sheets with implications for Mars , 1980 .

[35]  U. Mayr,et al.  The sedimentary rocks of Devon island, canadian arctic archipelago , 1987 .

[36]  H. Newsom,et al.  Mixed Hydrothermal Fluids and the Origin of the Martian Soil: A New Quantitative Model , 1999 .

[37]  J. Zussman,et al.  Disilicates and Ring Silicates , 1986 .

[38]  L. Crossey,et al.  Post-impact hydrothermal alteration of the Manson impact structure , 1996 .

[39]  G. Graup.  Carbonate‐silicate liquid immiscibility upon impact melting: Ries Crater, Germany , 1999 .

[40]  Pil Joong Lee.  A Unique Mars/Early Mars Analog on Earth: The Haughton Impact Structure Devon Island, Canadian Arctic , 1997 .

[41]  J. Farmer.  Hydrothermal systems: Doorways to early biosphere evolution , 2000 .

[42]  L. Bischoff,et al.  The Surface Structure of the Haughton Impact Crater, Devon Island, Canada , 1988 .