Initial Reports of the Deep Sea Drilling Project, 33

Schlanger, Seymour O.; Jackson, E.D.

doi:10.2973/dsdp.proc.33.1976

Cited by 119 publications

(10 citation statements)

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“…Sills and dikes in the Calera limestone indicate that volcanism continued during pelagic sedimentation. Volcanism on oceanic rises is thought to follow a more complicated time history than at mid-ocean ridges [Schlanger and Jackson, 1976]. We therefore conclude that the Calera Limestone, the greenstones, and the bedded lithic-volcanic turbidires all may be associated (Figures 1 la,b) with this oceanic plateau postulated by Tarduno et al [1985].…”

Section: Our Studies Of the Bulk Chemistry And Proxene Chemistry Of Gsupporting

confidence: 55%

“…Significant thickness of breccias and turbidires of basaltic material are associated with anomalous topography on the seafloor and are commonly associated with rise sequences [Larson and Moberly, 1975;Schlanger and Jackson, 1976]. Sills and dikes in the Calera limestone indicate that volcanism continued during pelagic sedimentation.…”

Section: Our Studies Of the Bulk Chemistry And Proxene Chemistry Of Gmentioning

confidence: 99%

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Subduction and accretion of the permanente terrane near San Francisco, California

Larue¹,

Barnes²,

Sedlock³

1989

Tectonics

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Previous studies of the Calera limestone (Permanente terrane, Franciscan complex) of California have shown that deposition occurred at approximately 25°N paleolatitude atop an oceanic plateau or rise, and that it was subsequently transported northeast and accreted to the North American continental margin in the early Tertiary. The Permanente terrane in the study area along the Pacific coast south of San Francisco contains a suite of rock types present in north dipping imbricate thrust slices possibly related to the subduction and accretion of an oceanic crustal sequence. Geochemical studies of greenstones, thought to represent fragments of the dismembered oceanic crust, indicate affinities with mid‐ocean ridge basalts and within‐plate basalt. These greenstones may represent fragments of the rise upon which the Calera limestone was deposited. Metamorphic minerals in the greenstones indicate both sea‐floor metamorphism and locally, high‐pressure, low‐temperature metamorphism. It is concluded tentatively that the entire Permanente terrane in the study area underwent high‐pressure, low‐temperature metamorphism but that temporal or geologic conditions prevented widespread recrystallization or development of blueschist facies minerals. Structures in the deformed rocks can be related to underthrusting beneath the continental margin and attachment to the overriding plate. Studies of veins indicate several stages of dewatering. It is likely that dewatering was a major process in the attachment event, as shown by veins associated with this phase of deformation. Structurally interleaved mélanges and broken formation contain sedimentary rock clearly derived from a continental margin; these rocks probably represent trench and trench slope facies that were underthrust with the accreting oceanic crustal sequence.

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Section: Our Studies Of the Bulk Chemistry And Proxene Chemistry Of Gsupporting

confidence: 55%

Section: Our Studies Of the Bulk Chemistry And Proxene Chemistry Of Gmentioning

confidence: 99%

Subduction and accretion of the permanente terrane near San Francisco, California

Larue¹,

Barnes²,

Sedlock³

1989

Tectonics

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“…Small amounts of plagioclase were extracted from two basalt lava flows drilled at DSDP Site 317 on the Manihiki High Plateau (Schlanger et al, 1976), barely enough (3-4 mg) to carry out two step-heating analyses on each. Fortunately, all of them produced plateaus with only minimal disturbances in the lowest and highest temperature heating steps (Fig.…”

mentioning

confidence: 99%

Erratum to K. Hoernle, F. Hauff, P. van den Bogaard, R. Werner, N. Mortimer, J. Geldmacher, D. Garbe-Schönberg, B. Davy (2010) “Age and geochemistry of volcanic rocks from the Hikurangi and Manihiki oceanic Plateaus”, Geochimica et Cosmochimica Acta 74, 7196–7219

Hoernle

2012

Geochimica et Cosmochimica Acta

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Here we present the first radiometric age data and a comprehensive geochemical data set (including major and trace element and Sr-Nd-Pb-Hf isotope ratios) for samples from the Hikurangi Plateau basement and seamounts on and adjacent to the plateau obtained during the R/V Sonne 168 cruise, in addition to age and geochemical data from DSDP Site 317 on the Manihiki Plateau. The 40 Ar/ 39 Ar age and geochemical data show that the Hikurangi basement lavas (118-96 Ma) have surprisingly similar major and trace element and isotopic characteristics to the Ontong Java Plateau lavas (ca. 120 and 90 Ma), primarily the Kwaimbaita-type composition, whereas the Manihiki DSDP Site 317 lavas (117 Ma) have similar compositions to the Singgalo lavas on the Ontong Java Plateau. Alkalic, incompatible-element-enriched seamount lavas (99-87 Ma and 67 Ma) on the Hikurangi Plateau and adjacent to it (Kiore Seamount), however, were derived from a distinct high time-integrated U/Pb (HIMU)-type mantle source. The seamount lavas are similar in composition to similar-aged alkalic volcanism on New Zealand, indicating a second wide-spread event from a distinct source beginning ca. 20 Ma after the plateau-forming event. Tholeiitic lavas from two Osbourn seamounts on the abyssal plain adjacent to the northeast Hikurangi Plateau margin have extremely depleted incompatible element compositions, but incompatible element characteristics similar to the Hikurangi and Ontong Java Plateau lavas and enriched isotopic compositions intermediate between normal mid-ocean-ridge basalt (N-MORB) and the plateau basement. These younger ($52 Ma) seamounts may have formed through remelting of mafic cumulate rocks associated with the plateau formation. The similarity in age and geochemistry of the Hikurangi, Ontong Java and Manihiki Plateaus suggest derivation from a common mantle source. We propose that the Greater Ontong Java Event, during which $1% of the Earth's surface was covered with volcanism, resulted from a thermo-chemical superplume/dome that stalled at the transition zone, similar to but larger than the structure imaged presently beneath the South Pacific superswell. The later alkalic volcanism on the Hikurangi Plateau and the Zealandia micro-continent may have been part of a second large-scale volcanic event that may have also triggered the final breakup stage of Gondwana, which resulted in the separation of Zealandia fragments from West Antarctica.

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“…The San Juan terranes and the Piñón formation in Ecuador and Colombia [Reynaud et al, 1999;Mamberti et al, 2003;Jaillard et al, 2009] and the Gorgona Plateau are all oceanic features, which have been dated to be of Cretaceous origin (Figure 3b) [Kerr and Tarney, 2005] and have been accreted to the South American craton between the Late Cretaceous and the Paleocene. [Lapierre et al, 2000] 123 Ma [Reynaud et al, 1999] 88.9 ± 1.2 Ma [Kerr and Tarney, 2005] 125-116 Ma (expansion phase) 100-65 Ma (secondary volcanic phase) [Hoernle et al, 2010;Timm et al, 2011;Pietsch and Uenzelmann-Neben, 2015] Collision age Late Paleocene/early Eocene (~60-55 Ma) (this paper) 85-80 Ma [Mamberti et al, 2003] 66-56 Ma [Reynaud et al, 1999] 66-56 Ma [Kerr and Tarney, 2005] Calculated paleolatitude at emplacement 25-30°S [Cockerham and Jarrard, 1976;Hochmuth et al, 2015] No data No data 26-30°S [Kerr and Tarney, 2005] Petrological description…”

Section: Oceanic Terranes Of the Northern Andes 421 Terrane Aggregmentioning

confidence: 96%

“…The Gorgona Plateau, which is obducted at Gorgona Island (Figure 3b) and can possibly be related to the secondary volcanism of the Manihiki Plateau [Pietsch and Uenzelmann-Neben, 2015], was accreted to the South American craton in the Paleocene (Figure 3b) [Kerr and Tarney, 2005]. Paleolatitude calculations provide an emplacement latitude between 26°S and 30°S [Kerr and Tarney, 2005], which is also the emplacement latitude of the northern Manihiki Plateau [Cockerham and Jarrard, 1976;Chandler et al, 2013;Hochmuth et al, 2015]. The age and petrology correlates to the secondary magmatic phases of the Manihiki Plateau, but it is uncertain whether this magmatic phase occurred on all fragments, although both the Hikurangi Plateau and the Ontong Java Plateau experienced multiple phases of magmatic activity [Inoue et al, 2008;Hoernle et al, 2010].…”

Section: 1002/2016tc004333mentioning

confidence: 98%

Collision of Manihiki Plateau fragments to accretional margins of northern Andes and Antarctic Peninsula

Hochmuth

Gohl

2017

Tectonics

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The Manihiki Plateau, a large igneous province (LIP), was emplaced in the Early Cretaceous as a single plateau together with the Ontong Java Plateau and the Hikurangi Plateau. Additional to the present Manihiki Plateau, fragments to its northeast and east have been formed. Plate kinematic reconstructions suggest the capturing of these fragments by the Farallon Plate and the Phoenix Plate, respectively. By tracing these fragments, we report a Paleocene collision of the northeastern Manihiki Plateau fragment with the northern South American craton. The northern Andes exhibit multiple terranes of LIP origin. We infer, based on geophysical, petrological, and geochemical data, that the Piñón formation consists of crustal units of the former Manihiki Plateau. An Early Cretaceous collision of the eastern Manihiki Plateau fragment is reconstructed for West Antarctica. The subduction of this fragment in the Palmer Land region can be associated with the so‐called Palmer Land Event and a flattening of the subduction slab. By reconstructing the dispersal of the fragments of the Manihiki Plateau, we provide a deeper insight in the possible subduction scenarios and buildup of the accretional margins of the northern Andes and the Antarctic Peninsula.

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Initial Reports of the Deep Sea Drilling Project, 33

Cited by 119 publications

References 0 publications

Subduction and accretion of the permanente terrane near San Francisco, California

Subduction and accretion of the permanente terrane near San Francisco, California

Erratum to K. Hoernle, F. Hauff, P. van den Bogaard, R. Werner, N. Mortimer, J. Geldmacher, D. Garbe-Schönberg, B. Davy (2010) “Age and geochemistry of volcanic rocks from the Hikurangi and Manihiki oceanic Plateaus”, Geochimica et Cosmochimica Acta 74, 7196–7219

Collision of Manihiki Plateau fragments to accretional margins of northern Andes and Antarctic Peninsula

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