Formation and paleogeographic evolution of the Palawan continental terrane along the Southeast Asian margin revealed by detrital fingerprints

2020 ◽  
Author(s):  
Licheng Cao ◽  
Lei Shao ◽  
Peijun Qiao ◽  
Yuchi Cui ◽  
Gongcheng Zhang ◽  
...  
Keyword(s):  
South China Sea ◽  
South China ◽  
Northern South China Sea ◽  
Southeast Asian ◽  
Passive Margin ◽  
The South ◽  
China Sea ◽  
Stratigraphic Framework ◽  
Data Compilation ◽  
Early Cenozoic

The prolonged convergence along the Southeast Asian margin from the Mesozoic to Cenozoic shaped the region into a complex tectonic collage of microblocks of diverse origin and evolutionary history. Among these microblocks, the formation and paleogeographic evolution of the Palawan continental terrane remain issues of uncertainty and controversy, especially regarding the petrogenesis of the oldest rocks and the conjugate relationship with the South China margin. This study examined these issues from the perspective of detrital fingerprints (including geochemistry, heavy mineral, and zircon U-Pb geochronology) of Mesozoic to Cenozoic strata from Palawan Island and basins of the northern South China Sea. The across-margin comparison of provenance signatures, favored by a comprehensive data compilation and a revision of the stratigraphic framework using the youngest zircon ages, provides insights into regional paleogeographic reconstructions from the Jurassic to the Miocene. The results reveal provenance shifts that correspond to the paleogeography of the Palawan continental terrane evolving from an accretionary complex in the Jurassic to a rifted margin in the early Cenozoic and finally to a microcontinent in the middle Cenozoic. Based on comparable provenance signatures, the terrane is interpreted to have been conjugated to the northeastern South China Sea margin from the Mesozoic until the Oligocene spreading of the South China Sea. The terrane likely existed as a northern passive margin of the proto−South China Sea from the latest Cretaceous to early Cenozoic before the oceanic crust of the latter was emplaced over the former during the Oligocene−Miocene.

scholarly journals Managing Territorial Disputes in Southeast Asia: Is There more than the South China Sea?

2017 ◽  
Vol 36 (3) ◽  
pp. 35-61
Author(s):  
Nicole Jenne
Keyword(s):  
South China Sea ◽  
Conflict Management ◽  
South China ◽  
Southeast Asian ◽  
The South China Sea ◽  
Territorial Disputes ◽  
The South ◽  
Territorial Conflict ◽  
China Sea ◽  
Territorial Conflicts

The conflicts in the South China Sea have come to dominate debates on Southeast Asian security and specifically on how boundary disputes have been managed within the region. Yet, the case is not necessarily exemplary for the way Southeast Asian countries have dealt with territorial disputes generally. The article gathers three common perceptions about conflict management that are strongly informed by the South China Sea case, but have lesser relevance when looking at other territorial conflicts in the region. I offer a critical reading of the who, why, and how of territorial conflict management and provide tentative guidelines on what to expect in the future.

Michaelcallianassa sinica sp. nov. (Crusacea, Decapoda, Thalassinidea, Callianassidae) from the South China Sea

Zootaxa ◽  
2009 ◽  
Vol 2294 (1) ◽  
pp. 39-46
Author(s):  
WENLIANG LIU ◽  
RUIYU LIU
Keyword(s):  
New Species ◽  
South China Sea ◽  
South China ◽  
Type Species ◽  
Northern South China Sea ◽  
The South China Sea ◽  
Beibu Gulf ◽  
The South ◽  
China Sea ◽  
A New Species

A new species, Michaelcallianassa sinica, from the Beibu Gulf (Tonkin Gulf), northern South China Sea, is described and illustrated. The new species is readily distinguished from M. indica Sakai, 2002, the type species of the genus, by its short uropodal endopod and exopod, and elongated carpus of the minor cheliped.

Formation and Dynamics of a Long-Lived Eddy Train in the South China Sea: A Modeling Study

2017 ◽  
Vol 47 (11) ◽  
pp. 2793-2810 ◽  
Author(s):  
Zhongya Cai ◽  
Jianping Gan
Keyword(s):  
South China Sea ◽  
Wind Stress ◽  
South China ◽  
Northern South China Sea ◽  
Anticyclonic Eddy ◽  
The South China Sea ◽  
The South ◽  
Wind Stress Curl ◽  
China Sea ◽  
Anticyclonic Eddies

AbstractA process-oriented numerical modeling study was conducted to investigate the formation and underlying forcing of an anticyclonic eddy train observed in the northern South China Sea. Observations showed that long-lived anticyclonic eddies formed an eddy train along an eastward separated jet across the northern South China Sea in summer. The eddy train plays a critical role in regulating ocean circulation in the region. Forced by the southwesterly monsoon and prevailing dipole wind stress curl in the summer, the northward coastal jet separates from the west boundary of the South China Sea basin and overshoots northeastward into the basin. The anticyclonic recirculation of the separated jet forms the first anticyclonic eddy in the eddy train. The jet meanders downstream with a strong negative shear vorticity that forms a second and a third anticyclonic eddy along the jet’s path. These three eddies form the eddy train. These eddies weaken gradually with depth from surface, but they can extend to approximately 500 m deep. The inherent stratification in the region regulates the three-dimensional scale of the anticyclonic eddies and constrains their intensity vertical extension by weakening the geostrophic balance within these eddies. Analyses of the vorticity balance indicate that the eddy train’s negative vorticity originates from the beta effect of northward western boundary current and from the subsequent downstream vorticity advection in the jet. The jet separation is a necessary condition for the formation of the eddy train, and the enhanced stratification, increased summer wind stress, and associated negative wind stress curl are favorable conditions for the formation of the anticyclonic eddies.

The Tragedy of the Southeast Asian Commons

2014 ◽  
Vol 13 (1) ◽  
pp. 33-49 ◽  
Author(s):  
John Harvey Divino Gamas
Keyword(s):  
South China Sea ◽  
Political Culture ◽  
South China ◽  
Code Of Conduct ◽  
Southeast Asian ◽  
The South China Sea ◽  
Collective Decision Making ◽  
The South ◽  
China Sea ◽  
Cosmic Order

The South China Sea disputes have proven to be the most divisive issue in ASEAN. The collective decision-making of the ten member states towards the issue remains ineffective and this has often been attributed to their disunity. However, disunity in the ASEAN maritime commons is symptomatic of the underlying political culture in Southeast Asia. Using Lucian Pye’s analysis of power as ritual in Southeast Asian political culture, we can surmise that the disjuncture between the hopes for a definitive Code of Conduct and the resulting lack of consensus in the 2012 biannual ASEAN summit chaired by Cambodia concretised ritualism. This paper’s analysis focuses on how intra-ASEAN disagreement in resolving the South China Sea maritime dispute was compounded by Cambodia’s 2012 ASEAN chairmanship. It revealed that power as ritual reduces ASEAN integration into a temple in support of the secularised version of the cosmic order and thus tolerating its lack of pragmatic utility and efficiency.

scholarly journals China’s Crisis Bargaining in the South China Sea Dispute (2010-2013)

2014 ◽  
Vol 2 (2) ◽  
pp. 103
Author(s):  
Eryan Ramadhani
Keyword(s):  
South China Sea ◽  
South China ◽  
Southeast Asian ◽  
The South China Sea ◽  
Territorial Dispute ◽  
Positive Signal ◽  
The South ◽  
Crisis Bargaining ◽  
China Sea ◽  
Negative Signal

As one of China’s most intricate territorial dispute, the South China Sea dispute has sufficiently consumed significant amount of Chinese leaders’ attention in Beijing. This paper reveals that China exerts signaling strategy in its crisis bargaining over the South China Sea dispute. This strategy contains reassurance as positive signal through offering negotiation and appearing self-restraint and of negative signal by means of escalatory acts and verbal threats. China’s crisis bargaining in the South China Sea dispute aims to preserve crisis stability: a stabilized condition after escalation in which neither further escalation nor near-distant resolution is in order. From the yearly basis analysis in the four-year span study, China’s longing for crisis stability fits into its conduct in crisis bargaining with Southeast Asian states.

scholarly journals The US Rebalance and Southeast Asia

Asian Survey ◽  
2015 ◽  
Vol 55 (3) ◽  
pp. 572-595 ◽  
Author(s):  
Sheldon W. Simon
Keyword(s):  
South China Sea ◽  
Southeast Asia ◽  
South China ◽  
Southeast Asian ◽  
The South China Sea ◽  
Military Assistance ◽  
The South ◽  
China Sea ◽  
Us Military ◽  
The Us

This article assesses Southeast Asian views of the US “rebalance,” examining reactions to US military deployments, military assistance to partners, and support for Southeast Asian diplomacy on South China Sea conflicts. Although not ostensibly designed to contain China, the rebalance provides Southeast Asia with hedging options against more assertive PRC actions in the South China Sea.

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