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Lomilik
Bathymetry of Lomilik and Ļami Seamounts
Location in the Marshall Islands
Summit depth	1,350 metres (4,430 ft)
Location
Coordinates	11°42′N 161°37′E / 11.700°N 161.617°E / 11.700; 161.617
Country	Marshall Islands

Lomilik is a seamount in the Western Pacific Ocean, within the exclusive economic zone of the Marshall Islands. It lies to the west of Enewetak atoll and is named after the best fishing site in Anewetak atoll.

Lomilik has a 40-by-15-kilometre-wide (24.9 mi × 9.3 mi) summit terrace with the proper summit at circa 1,500 metres (4,900 ft) depth; a scarp separates the two and small hills reach depths of 1,350 metres (4,430 ft). The summit terrace is covered by rocks with ooze in between. A notch in the southern flank of Lomilik was likely created by a landslide. It is part of the Magellan Seamounts and consists of a Cretaceous volcano with a thin layer of carbonate rocks and ferromanganese. Lami seamount lies northwest of Lomilik.

The rocks found on Lomilik consist of basalt and limestone. Fluorapatite, hyaloclastite, mudstone, phosphorite and siltstone have been identified in rocks from the seamount. Manganese nodules have been found on Lomilik and the manganese crusts on the seamount reach thicknesses of over 10 centimetres (3.9 in); the thickest crust recovered from an ocean is a 18 centimetres (7.1 in) thick ferromanganese crust from Lomilik recovered in 1989. The deposits on Lomilik could potentially be mined.

References

1. ^ Hein, J.R.; Koschinsky, A. (2014-01-01). "Deep-Ocean Ferromanganese Crusts and Nodules". Treatise on Geochemistry. p. 274. doi:10.1016/B978-0-08-095975-7.01111-6. ISBN 9780080983004.
2. ^ Hein et al. 1998, p. 2.
3. Hein et al. 1990, p. 245.
4. Hein et al. 1999, p. 3.
5. Hyeong, Kiseong; Kim, Jonguk; Yoo, Chan Min; Moon, Jai-Woon; Seo, Inah (December 2013). "Cenozoic history of phosphogenesis recorded in the ferromanganese crusts of central and western Pacific seamounts: Implications for deepwater circulation and phosphorus budgets". Palaeogeography, Palaeoclimatology, Palaeoecology. 392: 294. Bibcode:2013PPP...392..293H. doi:10.1016/j.palaeo.2013.09.012. ISSN 0031-0182.
6. Kim, Jonguk; Hyeong, Kiseong; Jung, Hoi-Soo; Moon, Jai-Woon; Kim, Ki-Hyune; Lee, Insung (1 December 2006). "Southward shift of the Intertropical Convergence Zone in the western Pacific during the late Tertiary: Evidence from ferromanganese crusts on seamounts west of the Marshall Islands". Paleoceanography. 21 (4): 2. Bibcode:2006PalOc..21.4218K. doi:10.1029/2006PA001291. ISSN 1944-9186.
7. Hein et al. 1990, p. 108.
8. Hein et al. 1998, p. 4.
9. Hein, James R.; Koschinsky, Andrea; Halbach, Peter; Manheim, Frank T.; Bau, Michael; Kang, Jung-Keuk; Lubick, Naomi (1997). "Iron and manganese oxide mineralization in the Pacific". Geological Society, London, Special Publications. 119 (1): 127. Bibcode:1997GSLSP.119..123H. doi:10.1144/GSL.SP.1997.119.01.09. ISSN 0305-8719. S2CID 128892570.
10. Hein, James R.; Benninger, Laura M. (2000). Diagenetic Evolution of Seamount Phosphorites (Report). p. 248.
11. Hein et al. 1990, p. 32.
12. Hein et al. 1999, p. 14.

Sources

• Hein, J.R.; Kang, Jung-Keuk; Schulz, M.S.; Park, Byong-Kwon; Kirschenbaum, Herbert; Yoon, Suk-Hoon; Olson, R.L.; Smith, V.K.; Park, Dong-Won (1990). Geological, geochemical, geophysical, and oceanographic data and interpretations of seamounts and co-rich ferromanganese crusts from the Marshall Islands, KORDI-USGS R.V. FARNELLA cruise F10-89-CP (Report).
• Hein, James R.; Moon, Jai-Woon; Lee, Kyeong-Yong; Kim, Ki-Hyun; Roberts, Leanne; Burrows, Malia; Park, S.H.; Dowling, Jennifer; Choi, Youn-ji (1998). Composition of Co-rich ferromanganese crusts and substrate rocks from the Marshall Islands, cruise KODOS 97-4 (Report).
• Hein, J.R.; Moon, Jai-Woon; Lee, Kyeong-Yong; Dowling, J.S.; Kim, Ki-Hyune; Burrows, Malia; Park, S.H.; Choi, Youn-ji; Schuetze, A.A. (1999). Co-rich Fe-Mn crusts from the Marshall Islands (Leg 1) and hydrothermal and hydrogenetic Fe-Mn deposits from Micronesia (Leg 2), KODOS 98-3 cruise, West Pacific (Report).

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• Seamounts of the Pacific Ocean
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