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D'Entrecasteaux Islands

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Journal Article
Journal: Geology
Published: 01 October 1992
Geology (1992) 20 (10): 907–910.
...E. J. Hill; S. L. Baldwin; G. S. Lister Abstract Metamorphic core complexes in the D'Entrecasteaux Islands are forming as a result of active extension at the western end of the Woodlark Basin spreading center. High-grade metamorphic rocks exist in the cores of gneissic domes, including eclogites...
Image
Tectonic map of the D’Entrecasteaux Islands MCCs, Papua New Guinea, modified from Little et al. (2011). The tip of the propagating ocean-ridge segment in the Woodlark Basin lies just east of the map area. Dome-shaped MCCs are delineated by active normal faults (black), which displace to the north, parallel to the plate divergence direction. These faults cut an earlier detachment (red), which separates upper plate ophiolitic rocks from lower plate gneisses with relict eclogites. The detachment is underlain by a zone of mylonitic gneiss; dome cores are occupied by migmatitic gneiss with earlier deformational fabrics.
Published: 27 November 2014
Fig. 9. Tectonic map of the D’Entrecasteaux Islands MCCs, Papua New Guinea, modified from Little et al . (2011) . The tip of the propagating ocean-ridge segment in the Woodlark Basin lies just east of the map area. Dome-shaped MCCs are delineated by active normal faults (black), which displace
Image
Present-day three-dimensional block diagram of D'Entrecasteaux Islands modified after Hill et al. (1995). G—Goodenough; F—Fergusson; N—Normanby; PUB—Papuan Ultra-mafic Belt; AUS—Australian plate.
Published: 01 October 2008
Figure 3. Present-day three-dimensional block diagram of D'Entrecasteaux Islands modified after Hill et al. (1995) . G—Goodenough; F—Fergusson; N—Normanby; PUB—Papuan Ultra-mafic Belt; AUS—Australian plate.
Journal Article
Journal: GSA Bulletin
Published: 01 December 1971
GSA Bulletin (1971) 82 (12): 3299–3312.
... is generally greenschist facies, but is higher in the D'Entrecasteaux Islands and on part of Misima Island; lawsonite occurs mainly within a few kilometers of the Owen Stanley fault which bounds the mainland metamorphics on the north and northeast. Mesozoic mafic rocks include peridotite, gabbro and basalt...
Journal Article
Journal: Lithosphere
Publisher: GSW
Published: 01 April 2012
Lithosphere (2012) 4 (2): 131–149.
... center, but it is unknown whether all core complexes are still active. We assess the spatial pattern and recent history of rock and surface uplift in the subaerial portion of the Woodlark Rift using stream profile analyses on the D'Entrecasteaux Islands and eastern Papuan Peninsula. Most stream profiles...
FIGURES | View All (15)
Series: Geological Society, London, Special Publications
Published: 01 January 2001
DOI: 10.1144/GSL.SP.2001.187.01.18
EISBN: 9781862394353
... in the Dawson Strait area of the D’Entrecasteaux Islands, whereas the four older tephra layers are attributed to explosive eruptions in the Moresby Strait area of the D’Entrecasteaux Islands. The 40 Ar/ 39 Ar ages of volcaniclastic sand layers in Holes 1115C and 1118A indicate a transition from a shallow-water...
FIGURES | View All (11)
Image
(A) Tectonic map of eastern Papuan New Guinea, showing global positioning system vectors (black arrows) and model vectors (orange arrows) for present-day Woodlark plate motion relative to the Australian plate. Historical and modern Euler poles are shown. Solid outlined box shows location of Figure 3. (B) Strike-parallel swath profiles of the D'Entrecasteaux Islands (gray) and Owen Stanley Range (black). Data are from the Global Multi-Resolution Topography data set sampled at 200 m (Ryan et al., 2009). Position of D'Entrecasteaux Islands on x-axis is arbitrary to avoid overlap of profiles. WR—Woodlark Rift; DEI—D'Entrecasteaux Islands; NI—Normanby Island; FI—Fergusson Island; GI—Goodenough Island; SDM—Suckling-Dayman massif; OSR—Owen Stanley Range; OSFZ—Owen Stanley fault zone; PAC—Pacific plate; AUS—Australian plate; WLK—Woodlark plate.
Published: 01 April 2012
location of Figure 3 . (B) Strike-parallel swath profiles of the D'Entrecasteaux Islands (gray) and Owen Stanley Range (black). Data are from the Global Multi-Resolution Topography data set sampled at 200 m ( Ryan et al., 2009 ). Position of D'Entrecasteaux Islands on x -axis is arbitrary to avoid
Series: GSA Special Papers
Published: 01 January 2006
DOI: 10.1130/2006.2406
..., but are especially characteristic from the south coast of Viti Levu in Fiji. Quartzose tectonic highland tempers occur in sherds from the outer Banda arc, the Aru Islands in the Arafura Sea, the D'Entrecasteaux Islands of the Solomon Sea, and New Caledonia. Nonquartzose tectonic highland tempers derived from...
Series: Geological Society, London, Special Publications
Published: 01 January 2013
DOI: 10.1144/SP385.7
EISBN: 9781862396494
... the D'Entrecasteaux Islands into the Louisiade Archipelago. Lithologies are predominantly basaltic andesite and andesite, but include basalt, dacite and rhyolite. The rocks have typical arc-type geochemical features but include a group ranging from basalt to dacite which, although comparable in most other aspects...
FIGURES | View All (9)
Journal Article
Journal: Geology
Published: 01 September 2008
Geology (2008) 36 (9): 735–738.
... eclogite from the lower plate of one of the D'Entrecasteaux Islands metamorphic core complexes within the Woodlark Rift. Zircon crystallization temperatures (650–675 °C) and 238 U/ 206 Pb age (ca. 8 Ma), and rutile thermometry (695–743 °C) combined with garnet-pyroxene thermometry (600–760 °C) and garnet...
FIGURES | View All (4)
Journal Article
Journal: Geology
Published: 01 November 1995
Geology (1995) 23 (11): 1023–1026.
...Suzanne L. Baldwin; Trevor R. Ireland Abstract U/Pb ion microprobe analyses of zircons from gneisses and granodiorites exposed in the D'Entrecasteaux Islands, and from conglomerate sections of the Goodenough No. 1 well in the adjacent Trobriand Basin, provide constraints on the age of magmatism...
Journal Article
Journal: AAPG Bulletin
Published: 01 December 1974
AAPG Bulletin (1974) 58 (12): 2477–2489.
... the Cape Vogel basin and another separate basin between the Trobriand and D’Entrecasteaux Islands. These basins are on an overriding plate of oceanic mantle and crust that was thrust southwestward onto the Mesozoic Owen Stanley metamorphic rocks during an earlier period of plate-tectonic adjustment...
FIGURES | View All (8)
Image
Map of area around eastern New Guinea showing location of Emirau Island, D’Entrecasteaux Islands, Sepik valley and Torare River.
Published: 01 March 2012
Fig. 1 Map of area around eastern New Guinea showing location of Emirau Island, D’Entrecasteaux Islands, Sepik valley and Torare River.
Image
Normalized steepness index plotted versus incision for S1 stream profiles in (A) the D'Entrecasteaux Islands, (B) the Owen Stanley Range, and (C) both regions combined. Error bars represent 95% confidence interval. R2 is 0.56, 0.18, and 0.40 in A, B, and C, respectively. T-tests of linear regressions indicate correlations are significant at the 99% confidence interval.
Published: 01 April 2012
Figure 13. Normalized steepness index plotted versus incision for S 1 stream profiles in (A) the D'Entrecasteaux Islands, (B) the Owen Stanley Range, and (C) both regions combined. Error bars represent 95% confidence interval. R 2 is 0.56, 0.18, and 0.40 in A, B, and C, respectively. T-tests
Image
Tectonic and geologic map of eastern Papua New Guinea (Baldwin et al., 2004). Asterisk indicates coesite-eclogite locality (9°29′0″S, 150°27′40″E). Red arrows indicate present-day plate motion vectors (Wallace et al., 2004). White dashed line indicates Bruhnes chron. Inset shows microplates of Australian-Pacific plate boundary zone. Abbreviations: WLK—Woodlark plate; SBP—South Bismarck plate; UHP—ultrahigh pressure. Map: DI—D'Entrecasteaux Islands; G—Goodenough Island; F—Fergusson Island; N—Normanby Island; PUB—Papuan ultramafic belt. After Baldwin et al. (2004).
Published: 01 September 2008
microplates of Australian-Pacific plate boundary zone. Abbreviations: WLK—Woodlark plate; SBP—South Bismarck plate; UHP—ultrahigh pressure. Map: DI—D'Entrecasteaux Islands; G—Goodenough Island; F—Fergusson Island; N—Normanby Island; PUB—Papuan ultramafic belt. After Baldwin et al. (2004) .
Image
Perspective views illustrating faceted mountain fronts and parallel drainage networks associated with some of the metamorphic core complexes in the Owen Stanley Range and D'Entrecasteaux Islands, southeastern Papua New Guinea. In all panels, Landsat images (30 m cell size) are draped over Shuttle Radar Topography Mission digital elevation model (∼90 m cell size). Vertical exaggeration is 1.5×; scale varies in this perspective. White arrows indicate upper-plate transport direction, and yellow lines are fault traces (Daczko et al., 2009; Hill, 1994; Little et al., 2007).
Published: 01 April 2012
Figure 2. Perspective views illustrating faceted mountain fronts and parallel drainage networks associated with some of the metamorphic core complexes in the Owen Stanley Range and D'Entrecasteaux Islands, southeastern Papua New Guinea. In all panels, Landsat images (30 m cell size) are draped
Image
Decompressional P–T paths from MCCs. (1) Western Gneiss Region, Norwegian Caledonides (Hacker 2007). (2) D’Entrecasteaux Islands, Papua New Guinea (Little et al. (2011). (3) Tso Morari Dome, NW Himalaya (Guillot et al. 1997). (4) Nevado–Filabride MCC (Behr & Platt 2012). (5) Tinos, Aegean Sea (Jolivet et al. 2004). (6) Naxos (Aegean): metamorphic envelope (Avigad 1998). (7) Carratraca massif, southern Spain (Platt et al. 2003). (8) Valhalla Dome, Canadian Cordillera (McGrew et al. 2000; Norlander et al. 2002). (9) Ruby–East Humboldt MCC, US Cordillera (McGrew et al. 2000).
Published: 27 November 2014
Fig. 10. Decompressional P–T paths from MCCs. (1) Western Gneiss Region, Norwegian Caledonides ( Hacker 2007 ). (2) D’Entrecasteaux Islands, Papua New Guinea ( Little et al . (2011) . (3) Tso Morari Dome, NW Himalaya ( Guillot et al . 1997 ). (4) Nevado–Filabride MCC ( Behr & Platt 2012
Image
Plot of pyroxene compositions in a quadrilateral version of the ternary diagram Jd–Di+Hd–Ae (with the pyroxene species classification system of Morimoto et al., 1988) showing analyses of the Emirau jade (circles), “chloromelanite” (large squares) from Torare River, Papua Indonesia, of Wichmann (Visser, 2004), omphacite from eclogite samples 8016 (a line), 5019 (dashed outline) from the Cyclops Mountains (see Fig. 34: Weiland, 1999) and omphacite compositions from D’Entrecasteaux Islands eclogites (Fig. 4, Davies & Warren, 1992): other eclogites (outline with “DEI”), B20 & 439 samples(a line), A10 (blue line), other Na-poor eclogite (outline with “NPE”), and A276a (red line), other “S-stage” eclogites (outline with “S-Ecg”).
Published: 01 March 2012
, of Wichmann ( Visser, 2004 ), omphacite from eclogite samples 8016 (a line), 5019 (dashed outline) from the Cyclops Mountains (see Fig. 34: Weiland, 1999 ) and omphacite compositions from D’Entrecasteaux Islands eclogites ( Fig. 4 , Davies & Warren, 1992) : other eclogites (outline with “DEI”), B20
Journal Article
Journal: Geology
Published: 01 October 2008
Geology (2008) 36 (10): 823–826.
...Figure 3. Present-day three-dimensional block diagram of D'Entrecasteaux Islands modified after Hill et al. (1995) . G—Goodenough; F—Fergusson; N—Normanby; PUB—Papuan Ultra-mafic Belt; AUS—Australian plate. ...
FIGURES
Image
Interpretive tectonic evolution of the Mai’iu fault and Woodlark rift along cross-section line X-X′ (for location, see Fig. 2B) using an Australian plate (southern side fixed) reference frame. Crustal structure is partly after Finlayson et al. (1977), Fitz and Mann (2013), Ott and Mann (2015), Eilon et al. (2015), Jin et al. (2015), and Abers et al. (2016). (A) Circa 3 Ma snapshot, at inception of slip on Mai’iu normal fault. This was also a time of rapid exhumation, partial melting, and granitoid magmatism in the D’Entrecasteaux Islands gneiss domes (along the rift axis ∼50 km to the east of the section). UHP—ultrahigh-pressure. (B) Circa 1.5 Ma snapshot, following uplift of the Suckling-Dayman metamorphic core complex. (C) Present day: after removal of crust(?) and mantle lithosphere along the rift axis. Microearthquakes and Moho and mantle structure are from Eilon et al. (2015) and Jin et al. (2015).
Published: 31 January 2019
and Mann (2015) , Eilon et al. (2015) , Jin et al. (2015) , and Abers et al. (2016) . (A) Circa 3 Ma snapshot, at inception of slip on Mai’iu normal fault. This was also a time of rapid exhumation, partial melting, and granitoid magmatism in the D’Entrecasteaux Islands gneiss domes (along the rift axis