scholarly journals Tectonic history of northern New Caledonia Basin from deep offshore seismic reflection: Relation to late Eocene obduction in New Caledonia, southwest Pacific

Tectonics ◽  
2008 ◽  
Vol 27 (6) ◽  
pp. n/a-n/a ◽  
Author(s):  
Julien Collot ◽  
Louis Geli ◽  
Yves Lafoy ◽  
Roland Vially ◽  
Dominique Cluzel ◽  
...  
Keyword(s):  
Seismic Reflection ◽  
New Caledonia ◽  
Late Eocene ◽  
Southwest Pacific ◽  
Tectonic History ◽  
History Of

Evolutionary biogeography and tectonic history of the ghost moth families Hepialidae, Mnesarchaeidae, and Palaeosetidae in the Southwest Pacific (Lepidoptera: Exoporia)

Zootaxa ◽  
2018 ◽  
Vol 4415 (2) ◽  
pp. 243 ◽  
Author(s):  
JOHN R. GREHAN ◽  
CARLOS G.C. MIELKE
Keyword(s):  
New Zealand ◽  
Fault Zone ◽  
New Caledonia ◽  
Lateral Displacement ◽  
Southwest Pacific ◽  
Biogeographic History ◽  
The Pacific ◽  
Extant Species ◽  
Distribution Ranges ◽  
History Of

The biogeographic history of Exoporia (Lepidoptera) in the Southwest Pacific is reconstructed for genera and species that show distributional boundaries corresponding to tectonic structures in the region. Correlations with tectonic formations of Mesozoic origin such as the Whitsunday Volcanic Province and Otway-Bass-Gippsland Basin system in Australia, the Vitiaz Fracture Zone in northern Melanesia, and the Western Province-Eastern Province boundary, Waitaki Fault Zone, and Waihemo Fault Zone of New Zealand are presented as evidence of an East Gondwana origin for genera and species before the geological separation of Australia and New Zealand. The correlated boundaries also suggest that many extant species retain at least parts of their original East Gondwana distribution ranges. The presence of Exoporia on the northern Melanesian Arc, New Caledonia, and New Zealand is attributed to the tectonic isolation of these areas when East Gondwana expanded into the Pacific following retreat of the Pacific Plate subduction zone. Local endemism of Mnesarchaeidae in New Zealand is interpreted as the result of an original vicariance from a widespread ancestor (‘Exoporia’) resulting in two allopatric descendants —a narrowly distributed Mnesarchoidea and a widely distributed Hepialoidea. The current overlap of these two groups in New Zealand is explained as the result of subsequent range expansion by the Hepialoidea prior to geological fragmentation of East Gondwana. The potential impact of Cretaceous geography on modern distributions is also considered for Exoporia in southern Africa and northern America. Along with lateral displacement of Exoporia, tectonic processes also contributed to the origin of high elevation endemics through a process of passive tectonic uplift. 

A comprehensive vicariant model for Southwest Pacific biotas

2016 ◽  
Vol 29 (6) ◽  
pp. 424 ◽  
Author(s):  
V. Ung ◽  
B. Michaux ◽  
R. A. B. Leschen
Keyword(s):  
Input Data ◽  
New Caledonia ◽  
Biological Data ◽  
Southwest Pacific ◽  
Compatibility Analysis ◽  
Island Endemics ◽  
History Of ◽  
Tectonic Development ◽  
Optimal Trees ◽  
General Period

In the present paper, we develop a new biogeographic model for the biota of the Southwest Pacific, using 76 published phylogenies for a range of island endemics or near-endemic organisms. These phylogenies were converted to areagrams by substituting distributions for taxa. Paralogy-free subtrees (3-item statements) were derived from these areagrams and used as input data into LisBeth that uses compatibility analysis and an exhaustive branch and bound algorithm to produce optimal trees. A general areagram is derived from all three-item statements common to the optimal trees. The results of the analysis show that the Melanesian Rift is not a natural biogeographic area; the islands of the Southwest Pacific are more closely related to each other than they are to Australia; and New Caledonia has had a long history of biological isolation. There is support for a general period of mobilism during the mid-Cenozoic when the biota as a whole expanded its range in response to regional uplift. By comparing the general areagram with what is known about the tectonic development of the region, it is possible to both calibrate the nodes of the areagram, and to identify points of conflict between the geological and biological data.

Tectonic history of a segment of the Pelagonian zone, northeastern Greece

1981 ◽  
Vol 18 (7) ◽  
pp. 1111-1126 ◽  
Author(s):  
Damian Nance
Keyword(s):  
Large Scale ◽  
Root Zone ◽  
Regional Metamorphism ◽  
Late Eocene ◽  
Metamorphic Rocks ◽  
Tectonic History ◽  
History Of ◽  
Ophiolitic Rocks ◽  
Platform Carbonates ◽  
Pelagonian Zone

Continental metamorphic rocks and ophiolitic bodies within the Pelagonian zone of the Hellenides in the Livadi area, northeastern Greece, show repeated periods of deformation that accompany thermal events of Early Cretaceous and possibly Late Eocene age. Structures associated with the earlier deformation indicate thrusting towards the northeast accompanying regional metamorphism of upper greenschist to lower amphibolite facies. Later structures and a retrogression to lower greenschist facies associated with emplacement of the Livadi ophiolitic rocks into their present position are likewise attributed to northeast-directed thrusting and probably accompanied the allochthonous movement of the Pelagonian basement over the Mesozoic platform carbonates of Mt. Olympos.Emplacement vectors of northeast polarity are inconsistent with tectonic models of the Hellenides involving large-scale southwestward obduction of Mesozoic ophiolites from a single ocean located northeast of the Pelagonian zone. Tectonic models involving the converging emplacement of Mesozoic ophiolites from two oceans lying northeast and southwest of the Pelagonian zone are more compatible with the observed structures, the latter ocean providing a potential root zone for the deformed ophiolitic rocks at Livadi.The orientation of minor structures associated with thrusting that postdates the emplacement of the Livadi ophiolitic rocks is consistent with movement from north to south.

Structure and tectonic history of the Southern Kerguelen Plateau (Indian Ocean) deduced from seismic reflection data

Tectonics ◽  
1992 ◽  
Vol 11 (6) ◽  
pp. 1332-1347 ◽  
Author(s):  
Yair Rotstein ◽  
Roland Schlich ◽  
Marc Munschy ◽  
Millard F. Coffin
Keyword(s):  
Indian Ocean ◽  
Seismic Reflection ◽  
Kerguelen Plateau ◽  
Seismic Reflection Data ◽  
Reflection Data ◽  
Tectonic History ◽  
History Of
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