 | | Journal (article/letter/editorial) | | calculated maximum velocity component parallel to the line of age progression could then be as much as 23 mm=yr...Cretaceous seamount volcanism in the Marshall Islands [14,15], the Wentworth seamounts [16], the Musicians...Musicians seamounts [17] and the Line Islands [18]. The MST, therefore, al- Fig. 1. Location of the West...spectrum Age š 2¦ (Ma) 17.12 154.33 hawaiite 17.12 154.33 hawaiite grndm plag [20] plag [20] 17.12 154...154.33 alkali basalt plag 16.40 154.35 hawaiite plag plag 17.03 154.07 hbl basanite hbl 16.98 154.02 hbl |  | | Report (issue) | | PETROLOGY OF BASALTIC ROCKS FROM THE MARSHALL ISLANDS by Alice S. Davis 1 , William C. Schwab2 and Janet...seamounts, guyots, atolls, and islands in the Ratak chain of the Marshall Islands on the U.S. Geological Survey...transitional between alkali olivine basalt and hawaiite. Two lithologies appear to be present. Samples...heterolithologic tuff breccia and loose angular pieces of hawaiite. The tuff breccia consists of poorly sorted, angular...lithologies transitional between alkali basalt and hawaiite are represented: One type (D4-2) is moderately |  | | Journal (article/letter/editorial) | | dating has been applied to (1) one medium-grained hawaiite from the Suiko Seamount in the Emperor volcanic...in the Necker Rise, and (3) twelve rocks from the Line volcanic chain and its vicinity. 40Ar-39Ar ages...the F test suggested acceptable fits to a straight line at 95% confidence level were used for age interpretation...formation of the northern part of the Line volcanic chain. Ages for the Line chain samples are very complex...progression which should be expected if the whole Line volcanic chain is of a hot spot origin. 1. Introduction |  | | Journal (article/letter/editorial) | | geochemically similar to lavas from the Hawaiian Islands . Rock types recovered include tholeiitic and alkalic...virtually identical to that of lavas from the Hawaiian Islands. This indicates that the source composition and...four ofthe edifices northwest of the Hawaiian Islands; Shaw et al., 1980). Despite the importance of...Dalrymple, 1975). Two seamounts south of the Hawaiian Islands have been dated at about 86 Ma (Dymond and Windom...Ridge, 20-8) are typical oflavas from the Hawaiian Islands. These samples can be subdivided into two groups |  | | Journal (article/letter/editorial) | | La Jolla, California 92093 ABSTRACT. The Samoan Islands are unique among the linear volcanic chains of...at the western end of the island chain, giving islands there an anomalously youthful appearance. Petrologic...geologic, and bathymetric data both on and around the islands indicate that the post-erosional rift zone developed...(Kear and lVood, 1959), whereas to the east. the islands of Upolu and Tutuila are progressively more eroded...stages of volcanism he had seen in the Hawaiian islands (Stearns, 1940): initial shield building followed |  | | Journal (article/letter/editorial) | | basalt ankaramite hawaiite hawaiite hawaiite hawaiite hawaiite hawaiite hawaiite basanite basanite...alkalic lava from the Ratak Chain of the Marshall Islands. J. Geophys. Res. 94, 5757–5774. Dodd, B., Anderson...R.A., 1984. Geology and geochronology of the line islands. J. Geophys. Res. 89, 11261–11272. Sebai, A...York, D., 1969. Least squares fitting of a straight line with correlated errors. Earth Planet. Sci. Lett |  | Schwab, W.C., Hein, J.R., Davis, A.S., Morgenson, L.A., Daniel, C.L., Haggerty, J.A. (1986) Geological and geochemical data for seamounts and associated ferromanganese crusts in the Ratak Chain, Marshall Islands. Open-File Report Vol. 1986 (86-338) US Geological Survey doi:10.3133/ofr86338 | Report (issue) | | Ferromanganese Crusts in the Ratak Chain, Marshall Islands by W.C. Schwab*, J.R. Hein 2 , A.S. Davis 2 , L... LEE along the northern Ratak Ridge, Marshall Islands (Fig. 1). Preliminary geochemical results from...crusts) on the submarine slopes of seamounts, and islands may have potential for commercial exploitation...technical evaluation of Mn crusts within the Marshall Islands area. Ferromanganese-oxide precipitates that encrust...submarine flanks of seamounts, guyots, atolls, islands, and linear volcanic ridges, have been known for |  | | Report (issue) | | large flat-topped edifice in the north-central Line Islands, and measures about 80 by 125 km at its base...differentiated and appears transitional between basalt and hawaiite. The glass composition (D11-A7) plots on the boundary...plagioclase in alkalic basalt from the Marshall Islands span all three fields in a single thin section...phenocrysts in alkalic basalt from the Marshall Islands (Davis and others, 1986; 1987) span the field of...volcanic islands such as Samoa (Natland, 1980), Caroline (Mattey, 1982), and Marshall Islands (Davis et |  | | Report (issue) | | study areas visited are located in the Hawaiian, Line, and Phoenix Archipelagoes, and in the Mid-Pacific...2 seamounts is similar to that of the Hawaiian Islands-Emperor Seamounts chain and to that of other central...submarine volcanic edifices in the northern Line Islands Archipelago and in the Mid-Pacific Mountains...volcanic edifices south of Johnston Island in the Line Islands Archipelago and Titov Seamount southeast of...surveyed submarine volcanic edifices in the Marshall Islands Archipelago and in the Johnston Seamount Group |  | | Journal (article/letter/editorial) | | compositions similar to those of lavas from the Hawaiian Islands, but initial 87 Sr/86Sr ratios extend to lower...NUMBER 1 JANUARY 2003 volcanoes on the Hawaiian Islands (Lanphere et al., 1980; Regelous & Hofmann, 1999;...from several other seamount chains (e.g. the Line Islands and the Society and Austral chains) have variable...EMPEROR SEAMOUNTS Active volcanoes on the Hawaiian Islands represent the current site of intra-plate volcanism...geochemical studies of lavas from the Hawaiian Islands, much less is known about the geochemistry of Hawaiian |  | | Journal (article/letter/editorial) | | similar to those of the Marquesas and Society Islands. Post-erosional samples have lower 2°rpb/Z°4pb...differences between basalts e r u p t e d o n oceanic islands a n d those erupted at m i d - o c e a n ridges...post-erosional source. 2. Geological background The Samoan Islands are situated just north of the Tonga Trench near...eight m a p p e d shield volcanoes which form six islands. As in the Hawaiian chain, the chemistry of the...relation of the Samoan Islands to other tectonic features. (b) Map of the Samoan Islands showing the extent |  | | Report (issue) | | collected with Go-flo® bottles suspended on Kevlar® line, filtered at sea through 0.45 Jim polycarbonate...Karin Ridge is the northwest terminus of the Line Islands Ridge. The sinuous crest of Karin Ridge varies...ripples characterize the sediment surface. Pebbles line the current-ripple troughs in places. Camera station...Eocene volcanism, found in other parts of the Line Islands ridge, has not been found to have occurred on...Pacific crusts, especially those from the Marshall Islands (489 ppb; Table 13). The PGEs show significant |  | | Report (issue) | | Normal Seismic Activity in and near the Japanese Islands Norio Yamakawa.. . . . . . . . . . . . . . . ....Land Gravity Survey of the Solomon and Bismarck Islands T.S.Laudon . . . . . . . . . . . . . . . . . .... . . . . . . . . . .279 . The British Solomon Islands: Some Geological Implications of the Gravity Data...Gravity Anomalies in Two Zones of the Japanese Islands Takeshi Dambara . . . . . . . . . . . . . . . ...Marine Gravity and Magnetic Studies of the Solomon Islands J . C. Rose, George P . Woollard, and Alezander |  | 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, Riddle, G.O., Quinterno, P.J., Lee, Yoon-Oh, Davis, A.S., Kim, R.S., Pringle, M.S., Choi, Dong-Lim, Pickthorn, L.G., Schlanger, S.O., Duennebier, F.K., Bergersen, D.D., Lincoln, J.M. (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. Open-File Report Vol. 1990 (90-407) US Geological Survey doi:10.3133/ofr90407 | Report (issue) | | Co-rich Ferromanganese Crusts from the Marshall Islands, KORDIUSGS R.V. Farnella Cruise F10-89-CP by James...cooperative cruise (F10-89-CP) to the Marshall Islands (Figs. 1, 2). Eight scientists from Korea, twelve...one observer from the Republic of the Marshall Islands comprised the scientific staff (Table 1). The two...crusts that occur on seamounts in the Marshall Islands Exclusive Economic Zone (EEZ), and 2. To determine...evolution of the seamounts and atolls in the Marshall Islands region. Shipboard operations comprised 46 stations |  | | Journal (article/letter/editorial) | | are shown. Fossil sea floor spreading axis (heavy line) is drawn coincident with marine magnetic anomaly...composition from olivine tholeiite to alkali basalt and hawaiite. 5. Methods--age measurement Samples chosen as...regression analysis was undertaken. The best fit line through the conventional K-Ar results on 11 samples...samples from 4 volcanoes yields a best fit straight line: Age (Ma) = 71.2( + 4.7) - 1.754( + 0.144) X The...coefficient i s - 0.980, the inverse of the slope of the line gives a volcanic propagation rate of 63 __ 5 iron/year |  | | Journal (article/letter/editorial) | | rocks on all of these seamounts are alkali basalt, hawaiite, and mugearite (Davis et al., 2002). Davidson...approximate water depths based on the length of the dredge line, TE tensiometer readings, and wire angle. Samples...Gray, L.B., Clague, D.A., Hein, J.R., 2002. The Line Islands revisited: New NU 40Ar/39Ar geochronologic...of volcanism due to lithospheric extension: Line Islands revisited. Geochem. Geophys. Geosystems 3, 1–28...seamounts off southern California were ancient islands. Mar. Geol. 265, 146–156. doi:10.1016/j.margeo |  | Hein, James R., Ahn, Jung-Ho, Wong, J.C., Kang, Jung-Keuk, Smith, V.K., Yoon, Suk-Hoon, d'Angelo, W. M., Yoo, Sang-Ok, Gibbs, A.E., Kim, Han-Joon, Quinterno, P.J., Jung, Moon-Young, Davis, A.S., Park, Byong-Kwon, Gillison, J.R., Marlow, M. S., Schulz, M.S., Siems, D.F., Taggart, J.E., Rait, Norma, Pickthorn, L.G., Malcolm, M.J., Kavulak, M.G., Yeh, Hsueh-Wen, Mann, D. M., Noble, M.A., Riddle, G.O., Roushey, B.H., Smith, Hezekiah (1992) Geology, geophysics, geochemistry, and deep-sea mineral deposits, Federated States of Micronesia; KORDI-USGS R.V. Farnella Cruise F11-90-CP. Open-File Report Vol. 1992 (92-218) US Geological Survey doi:10.3133/ofr92218 | Report (issue) | | the arc (inner trench wall, summit, and summit islands) are metamorphic rocks of greenschist and amphibolite...long and has a summit platform supporting several islands: Ulithi Atoll, Fais Island, and Woleai Atoll; several...area. Each airgun line number is followed (in parentheses) by the direction of the line shown in the figures...means the line is presented with north on the left and south on the right. The 3.5 kHz line orientations...captions. Pali Seamount was crossed by lines 1-3. On LINE 1 (S-N; Figs. 4, 24, 25) the sediment thickness |  | | Book (volume) | | Volcanic Chains ...................... C. Caroline Islands .................................... D. Islas Revillagigedos...Seamount Chain ........................... B. Line Islands ....................................... C. Louisville....... D. Geology of the Offshore and Galapagos Islands ........ III. Correlation and Geological History... Contents xi Chapter 8. The Sea of Okhotsk-Kuril Islands Ridge and Kuril-Kamchatka Trench Helios S. Gnibidenko...the Sea of Okhotsk ............. III. The Kuril Islands Ridge and Kuril-Kamchatka Trench. . . . . A. Introduction |  | Garcia, Michael O., Caplan-Auerbach, Jackie, De Carlo, Eric H., Kurz, M.D., Becker, N. (2006) Geology, geochemistry and earthquake history of Lṑihi Seamount, Hawaìi's youngest volcano. Geochemistry, 66 (2) 81-108 doi:10.1016/j.chemer.2005.09.002 | Journal (article/letter/editorial) | | are among the least radiogenic found at ocean islands, and may indicate a relatively deep and undegassed...loveliest fleet of islands that lies anchored in any ocean’’ (Twain, 1872). This fleet of islands and seamounts...location of this figure in relation to the major islands of the Hawaiian archipelago and its capital, Honolulu...age of the islands to the south (e.g., Dana, 1891). The overall age progression of the islands has been...seamount is one of many that surround the Hawaiian Islands, some of which have been dated by K–Ar methods |  | | Book (edition) | | different hierarchies: Hawaii BZ East Pacific Ocean Islands Polynesia United States All three BZ broader terms...Chondrostei NA Holostei NA Teleostei UF @ Adelaidean Islands Adalia use Antalya Adamawa Administrative region...Adzhar Adzharia BT Georgian Republic USSR Aegean Islands In 1981, broader term changed from Greece to Mediterranean...region. BT Mediterranean region SA Greek Aegean Islands Between Greece on the W and Tur- Admire Village...Mediterranean Mediterranean Sea SA Greek Aegean Islands aegerine use aegirine Aegina Town and island in |  | | Book | | settings-major oceans, back-arc basins, intraplate oceanic islands, and seamounts. Part IV (Sources) briefly reviews...Spreading centres Fracture zone structure Oceanic islands and swells Concluding statements Structure of...161 161 166 167 167 171 ENVIRONMENTS Oceanic islands and seamounts 174 PETER FLOYD 9.1 9.2 9.3 9.4...basalts from Iceland and other Atlantic oceanic islands Comparison of the North Atlantic and Iceland Concluding...model JOE CANN 1.1 Historical perspectives The islands of the ocean basins were familiar to early geologists |  | | Book | | seldascarsr ent 214 tandslides-of the Society Islands: ......cc.0c2.c.¢.2-soncaneasasece 214 ce ee OP...Oceanic Islands (<4 INUED cect: ................+5. 6.6.3 Landslide Related to Older Oceanic Islands (>4...x25 nna piedes soled aa RUT ae ie 8.2;2 Society Islands. xc geass scacunen nor coe ae eae 253 254 256...Pitcairn-Gambier Chaint 264 8/a:4 Marquesas: Islands... 7.cc.e2sy.coweshot ace eas ee 265 82-5 J...the observation that linear chains of volcanic islands and seamounts were younger than the oceanic crust |  | | Book (edition) | | Term. Each candidate Term was then searched on¬ line, to determine how and how often it occurred in GeoRef...of Aleutian Islands SW of Alaska Peninsula. BT Alaska BT United States SA Aleutian Islands Adalia use...UF Adzharia BT Georgian Republic BT USSR Aegean Islands In 1981, broader term changed from Greece to Mediterranean...region. BT Mediterranean region SA Greek Aegean Islands Aegean Sea Between Greece on the W and Turkey...Mediterranean BA Mediterranean Sea SA Greek Aegean Islands aegerine use aegirine Aegina Town and island in |  | | Book | | Catalogue of the Active Volcanoes of the World-Kurile Islands (Naples, 1958; in English) and Bezymyannyi Volcano...volcanoes and volcanic phenomena of the Kurile Islands as one of his first tasks. To a large degree, completion...petrochemical study of the volcanic rocks in the Kurile Islands. The conclusions reached required additional petrochemical...the expeditions to the volcanoes of the Kurile Islands: to V. 1. Lymareva, a participant in the first...37 37 41 44 Chapter V Volcanoes of the Kurile Islands Submarine Volcanoes. . . . . . . . . . . Terrestrial |  | | Book | | 77 85 86 90 94 100 104 105 CHAPTER 3 Oceanic Islands, Large lgneous Provinces, Mafic Dyke Swarms, and...volcanic islands 112 3.2.1. The Hawaiian-Emperor seamounts chain 116 3.2.2. Marquesas Islands 119 3.2...manifestations of plume activities, such as oceanic islands and oceanic plateaux, continental flood basalts...olivine-rich xeno1iths in alkali basalts of ocean islands that cou1d represent fragments of mantle material...continental crust plot on, or close to, the geochron (the line that determines the age of the mantle). When 206PbP04 |
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