2015
DOI: 10.1002/2015gc005745
|View full text |Cite
|
Sign up to set email alerts
|

Dynamics of intraoceanic subduction initiation: 2. Suprasubduction zone ophiolite formation and metamorphic sole exhumation in context of absolute plate motions

Abstract: Analyzing subduction initiation is key for understanding the coupling between plate tectonics and the underlying mantle. Here we focus on suprasubduction zone (SSZ) ophiolites and how their formation links to intraoceanic subduction initiation in an absolute plate motion frame. SSZ ophiolites form the majority of exposed oceanic lithosphere fragments and are widely recognized to have formed during intraoceanic subduction initiation. Structural, petrological, geochemical, and plate kinematic constraints on thei… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
4
1

Citation Types

4
92
0

Year Published

2015
2015
2020
2020

Publication Types

Select...
6

Relationship

4
2

Authors

Journals

citations
Cited by 116 publications
(100 citation statements)
references
References 127 publications
(285 reference statements)
4
92
0
Order By: Relevance
“…Furthermore, the metamorphic sole of the ophiolite yielded much older ages of 180–175 Ma [ Zhou et al , ], which would confine ophiolite displacement timing to late Early Jurassic time. This timing is several million years earlier than the obduction to continental margin if metamorphic sole is inferred to have been associated to intraoceanic subduction initiation [ van Hinsbergen et al , ]. Therefore, if the ophiolite obduction event is assumed to have resulted from the Lhasa‐Qiangtang collision [ Girardeau et al , ], then collision should have been older than the depositional age of the Dongqiao Formation (Late Jurassic to Early Cretaceous) and younger than the age of the metamorphic sole (180–175 Ma).…”
Section: Interpretation and Discussionmentioning
confidence: 99%
“…Furthermore, the metamorphic sole of the ophiolite yielded much older ages of 180–175 Ma [ Zhou et al , ], which would confine ophiolite displacement timing to late Early Jurassic time. This timing is several million years earlier than the obduction to continental margin if metamorphic sole is inferred to have been associated to intraoceanic subduction initiation [ van Hinsbergen et al , ]. Therefore, if the ophiolite obduction event is assumed to have resulted from the Lhasa‐Qiangtang collision [ Girardeau et al , ], then collision should have been older than the depositional age of the Dongqiao Formation (Late Jurassic to Early Cretaceous) and younger than the age of the metamorphic sole (180–175 Ma).…”
Section: Interpretation and Discussionmentioning
confidence: 99%
“…The ophiolites investigated in this study all have a suprasubduction zone geochemical signature [e.g., Robertson , , ]. Formation of SSZ ophiolites and associated metamorphic soles is widely viewed as intrinsically related to subduction initiation [e.g., Stern and Bloomer , ; Dilek and Furnes , ; Stern et al , , Maffione et al , , van Hinsbergen et al , ]. As a consequence, the occurrence of a major Late Cretaceous subduction initiation event within the eastern Mediterranean Neo‐Tethys Ocean is now widely accepted [e.g., Robertson , , ].…”
Section: Discussionmentioning
confidence: 99%
“…Previous studies have—logically—argued that intraoceanic subduction zones are likely to initiate at preexisting active intraoceanic plate boundaries: transform faults and (detachment faults along) spreading ridges [e.g., Gurnis et al , ; Maffione et al , ; van Hinsbergen et al , ]. Our new results, however, seem to point out to a different kinematics incompatible with these widely accepted models.…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…Metamorphic soles are widespread below the West Vardar Ophiolites and show K–Ar and 40 Ar– 39 Ar hornblende closure temperature ages of ~170 Ma (Dimo‐Lahitte et al, ; Roddick et al, ; Spray & Roddick, ; Spray et al, ; Sostarić et al, ; Figures and ). These isotopic closure temperature ages in metamorphic soles probably slightly postdate the actual inception of the subduction (van Hinsbergen et al, ), indicating that NE dipping subduction in the Vardar Ocean initiated in the Middle Jurassic, sometime between 175 and 170 Ma (Maffione & van Hinsbergen, ). The West Vardar Ophiolites also show a distinct west to east change of geochemical composition and internal structure.…”
Section: Discussionmentioning
confidence: 99%