Talk:Molloy Deep

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This article lacks a physical description of the Molloy Hole. I nominate the following, and need help putting in the links to make it part of this Wiki article.

Geology __________________________________________________________ The Molloy Deep (also called the “Molloy Hole” in scientific literature) is a bathymetric feature centered at 79°8′30″N 2°47′0″E in the Fram Strait between Greenland and the Svalbard archipelago, Norway. It is the deepest point of the Arctic Ocean at 5,550 m (18,209 ft). The Molloy Deep is a roughly rectangular, seismically active[1], extensional,[2] sea-floor basin, that lies between the northwestern tip of the Molloy Fracture Zone,[3] (a right-lateral,[4], strike-slip fault,[5]), and the Spitsbergen Fracture Zone (also a right-lateral, strike-slip fault). These two fracture zones connect the Knipovich Ridge (the actively spreading northern segment of the Mid-Atlantic ocean ridge system), with the Lena Trough, an actively spreading mid-ocean ridge region north of the Spitsbergen Fracture Zone. The Lena Trough joins the southwestern end of the Arctic Ocean’s Gakkel Ridge[6] which is the slowest spreading mid-ocean ridge on Earth,[7][8] and which stretches across the entire Arctic Oceans’ Eurasian Basin.[9]Gwyncann (talk) 03:32, 17 October 2019 (UTC)[reply] 

Now that the geology is described, I propose a better description of the Molloy Deep/Molloy Hole itself: It presently simply states: "The Molloy Deep is a bathymetric feature at 79°8′30″N 2°47′0″E in the Greenland Sea, 160 km from Svalbard. It is the deepest point of Fram Strait and prior to August 2019 was thought to be 5,669 m (18,599 ft) deep.[1][2]"  Altogether pretty weak tea.  My proposal:

The Molloy Deep (also known as the Molloy Hole in scientific literature) is a bathymetric feature in the Fram Strait, Greenland Sea east of Greenland and about 160 kms west of Svalbard (79° 8' 12" N 2° 49' 0" E)[10].  The outer rim of the hole is at 2700 m depth and contains about 600 square km inside the rim, descending to almost 5600 m at its greatest depth.  The basin floor measures about 220 square km, and is the deepest point in the Arctic Ocean.[11].
The Molloy Deep was discovered in September 1972 by the USNS Hayes (T-AGOR 16), the first of a new class of catamaran-hulled oceanographic research vessels. The Molloy Deep, Molloy Hole, Molloy Fracture Zone, and Molloy Fracture Zone were named after Arthur E. Molloy, a U.S. Navy research scientist who worked in the North Atlantic, North Pacific and Arctic Oceans 1950-1970s[12].Gwyncann (talk) 03:51, 19 October 2019 (UTC)

Next section I'd like to add is a summary of significant surveys of the Molloy Deep.  For instance:

1987 Bourke et.al. 5770 m 79.1666667N 02.8333333E   WRONG -- navigation and depth accuracy limited by then current technology
1990 Thiede reported 5,607 m at 79°08.5′N / 02°47.0′E -- better, bus still a few miles off.
1997 survey by a towed camera system "Ocean Floor Observation System" OFOS
1999 INFRMER GINS 4 RV Marion Dufresne; French ROV VICTOR 6000
1999 German AWI Project HAUSGARTEN RVs Polarstern, Maria S. Merian, and L’Atalante with ROV VICTOR 6000?
2000 German icebreaker Polarstern with OFOS July south of Molloy
2001 video-guided Multiple Corer (MUC)

The below are within a fraction of a mile of each other and within four meters depth
2002 Klenke and Schenke 5669 m 79.137N / 02.817E[13]
2006 German icebreaker Polarstern
2009 Swedish icebreaker Oden w/ Kongsberg EM 122 MBES
2012 Jakobsson 5573 m 79.141N 02.798E
2019 Vescovo's solo dive 5,550 m (18,210 ft) ±14 m (46 ft) direct measurement from the bottom  

HAUSGARTEN has a deep ocean station -- In 1999, the Alfred Wegener Institute, Helmholtz-Centre for Polar and Marine Research (AWI) established the LTER (Long-Term Ecological Research) observatory HAUSGARTEN crossing the Fram Strait at about 79° N. Sampling site # HGIX is at the bottom of the Molloy Hole at location Latitude: 79.133830 * Longitude: 2.842170 Date/Time: 2012-07-23T03:34:00 * Elevation: -5560.9 m   PS80/184-5 (HGIX) * Latitude: 79.133830 * Longitude: 2.842170 * Date/Time: 2012-07-23T03:34:00 * Elevation: -5560.9 m * Location: North Greenland Sea * Campaign: ARK-XXVII/2 (PS80) * Basis: Icebreaker Polarstern * Device: MultiCorer (MUC)[reply]

I need to develop references, details, etc. Back to the grind.Gwyncann (talk) 05:39, 19 October 2019 (UTC)[reply]

References

  1. ^ Laderach, C., et al. (2011). Seismicity and active tectonic processes in the ultra-slow spreading Lena Trough, Arctic Ocean. Geophysical Journal International, v.184, pp. 1354–1370. doi.org/10.1111/j.1365-246X.2010.04926
  2. ^ Baturin, D.G. (1990). Structure and Geodynamics of the Molloy Transform Fracture Zones in the Mid-Ridge System of the Norway–Greenland Oceanic Basin. Okeanologiya, 1990, v. 30, no. 3, pp. 436–443. (in Russian) https://link.springer.com/article/10.1134/S0024490210060039
  3. ^ JThiede, J. et al. (1990), Bathymetry of Molloy Deep: Fram Strait Between Svalbard and Greenland. Marine Geophysical Researches, v. 12, pp. 197-214
  4. ^ https://link.springer.com/article/10.1134/S0024490210060039
  5. ^ https://www.iris.edu/hq/inclass/animation/fault_right_lateral__strikeslip_fault_with_no_friction_
  6. ^ https://www.thoughtco.com/fault-types-with-diagrams-3879102
  7. ^ Cochran, J.R. et al. (2003). The Gakkel Ridge: Bathymetry, gravity anomalies, and crustal accretion at extremely slow spreading rates. Journal of Geophysical Research, v. 108, no. B2, 2116. doi:10.1029/2002JB001830
  8. ^ Nikishin, A.M., et al. (2018), Eurasia Basin and Gakkel Ridge, Arctic Ocean: Crustal asymmetry, ultra-slow spreading and continental rifting revealed by new seismic data: Tectonophysics, v. 746, (30 October), pp. 64-82. doi.org/10.1016/j.tecto.2017.09.006
  9. ^ https://en.wikipedia.org/wiki/Gakkel_Ridge
  10. ^ IHO-IOC GEBCO Gazetteer of Undersea Feature Names (2018-06-25), available online at http://www.ngdc.noaa.gov/gazetteer/
  11. ^ kkF. Freire, R. Gyllencrentz, R.U. Jafri, M. Jakobsson (2014), Acoustic evidence of a submarine slide in the deepest part of the Artic, the Molloy Hole: Springer-Verlag, Geo-Marine Letters DOI 10.1007/s00367-014-0371-5
  12. ^ Burton G. Hurdle (ed.), The Nordic Seas: Springer-Verlag, 1986; pp.227-28.
  13. ^ 29. Klenke M, Schenke HW. A new bathymetric model for the central Fram Strait. Marine Geophysical Researches. 2002;23(4):367–78. 10.1023/a:1025764206736 WOS:000185340300006.
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