Cenozoic paleostress evolution in south central Vietnam: Implication for changing dynamics of faulting along the eastern Indochina continental margin

Nguyen, Vuong Van; Hoai, Luong Thi Thu

doi:10.1016/j.jseaes.2019.104006

Cited by 9 publications

(39 citation statements)

References 89 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…While the lineations observed to-date do not show stepwise patterns that allow us to identify the sense of motion to test this prediction, because we do not observe dip-slip motion on these faults we can still effectively rule out an extension-dominated regime related to the SCS. The presence of strike-slip faulting is compatible with the results from extensive field mapping in the Cretaceous granites reported by Van Nguyen and Hoai (2019). Van Nguyen and Hoai (2019) further reported four stress regimes operating since the end of the Oligocene and interpreted a rotation in the stress field associated with extrusion.…”

Section: Discussionsupporting

confidence: 85%

“…We note that there is some spatial variation in each stress field across the Song Ba fault, which separates the Kontum and Da Lat blocks. Thus, we surmise that the Van Nguyen and Hoai (2019) dataset is compatible with our model. This is a non-peer reviewed MS; this is the version that was submitted to Earth and Planetary Science Letters on Oct 31, 2019.…”

Section: Discussionsupporting

confidence: 68%

“…Huchon et al, 1994a;Rangin et al, 1995) do not agree on fault locations or trajectories, nor on whether faults cut the voluminous basalt flows or whether the flows overrun the major faults. Van Nguyen & Hoai (2019) provide several data points where faults are observed to cut the Neogene or Quaternary basalts, although the bulk of their data points are in the Cretaceous age granites. Studies of basalt flow ages (e.g.…”

Section: Geologic Settingmentioning

confidence: 99%

See 2 more Smart Citations

Neogene-Recent Reactivation of Jurassic-age Faults in Southern Vietnam, with Implications for the Extrusion of Indochina

Burberry¹,

Elkins²,

Hoang³

et al. 2019

Preprint

View full text Add to dashboard Cite

Onshore Vietnam contains a complex series of faults coupled with a diffuse igneous province that has been active since the mid-Miocene. However, there are several conflicting fault maps in the literature and no consensus concerning the relative age of mapped faults and Neogene basalt flows, which becomes problematic when trying to use structural data to distinguish between competing tectonic models for the SE Asia region. This paper aims to define the Neogene-Recent tectonic setting and kinematics of the Da Lat block of the onshore Vietnam region, by analyzing the orientation, kinematics and ages of faults across a sub-region of the block. Fault ages can be constrained by the cross-cutting relationships with dated basalt flows. Results from remote sensing show a strong NE-SW fault trend for southern Vietnam, with additional, minor N-S, E-W and NW-SE trends. Fault orientations observed in the field fall into this NE-SW trending class, and are sub-vertical. In the basalt flows (with eruption ages < 5 Ma) these faults have oblique lineations with a strong strike-slip component. In Jurassic sediments, these faults show two sets of lineations: an older, dip-slip set, and a younger, oblique-slip set. We postulate that Jurassic-age dip-slip faults have been reactivated as strike-slip faults post 5 Ma. Strike-slip motion on NE-SW oriented faults is consistent with rotation and extrusion of the Kontum and Da Lat blocks. Rotation of the blocks is consistent with continuum rubble behavior of small crustal blocks under the influence of extrusion-driven asthenospheric flow.

show abstract

Section: Discussionsupporting

confidence: 85%

Section: Discussionsupporting

confidence: 68%

Section: Geologic Settingmentioning

confidence: 99%

See 1 more Smart Citation

Neogene-Recent Reactivation of Jurassic-age Faults in Southern Vietnam, with Implications for the Extrusion of Indochina

Burberry¹,

Elkins²,

Hoang³

et al. 2019

Preprint

View full text Add to dashboard Cite

show abstract

“…The research on the tectonic stress states in the Hue-Da Nang area by Delphine et al in 1997 [21] and by Rangin et al in 1995 [22] in the south-central Vietnam documented 2 main prior Middle Miocene strike-slip stress states and a younger local extensional stress state. Recently, Vuong et al 2019 [23] documented that south-central Vietnam has experienced a succession of four clockwise rotation tectonic stress regimes from Oligocene to the present.…”

Section: Geological Settingmentioning

confidence: 99%

“…The separation was based on the crosscutting, overprint relations of fault displacement and the age of affected rocks observed during field research. The field observation of the youngest displacement on the faults revealed that the paleostress responsible for the youngest faulting has probably lasted from Late Miocene to the present day as documented by Vuong et al [23]. The fault data was analyzed by the INVD method developed by Angelier [38].…”

Section: The Youngest Tectonic Stress Field In the Song Tranh 2 Hydropower Reservoir Areamentioning

confidence: 99%

Tectonic Stress Distribution in the Song Tranh 2 Hydropower Reservoir: Implication for Induced Earthquake

Hoai¹,

Vu²,

Nguyen³

et al. 2021

EES

Self Cite

View full text Add to dashboard Cite

The Song Tranh 2 hydropower reservoir was built in Tra My area, Quang Nam province, composing magmatic and high-grade metamorphic rocks of the northern part of the Kon Tum massif. Since the reservoir was put into operation, induced earthquakes have occurred in the Song Tranh 2 hydropower reservoir and its vicinity. Tectonically, the northwest-southeast to east-west striking faults developed strongly. Detailed analysis of slickensides and attitude of faults occurring in the studied area have shown that the northwest-southeast striking faults are reactivated as dextral ones during the Pliocene-Quaternary up to the present day. Based on the geometric distribution of the fault network, kinematic characteristics, and the youngest tectonic stress regime, we computed the distribution of tectonic stress in the studied area. Computation results show two positive anomalies of stress directly related to the northwest-southeast faults numbered 2, 10, 11a, 11b and sub-latitude striking fault numbered 1. These faults run in line with the local river channels and are likely to reactivate and generate induced earthquakes.

show abstract

Preface for the special issue “Geology, geodynamics and mineral resources of SE Asia”. Insights from GeoSEA XV Congress, Hanoi, 2018

Faure

Zaw

Tran

et al. 2020

Journal of Asian Earth Sciences

View full text Add to dashboard Cite

This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

show abstract

Cenozoic paleostress evolution in south central Vietnam: Implication for changing dynamics of faulting along the eastern Indochina continental margin

Cited by 9 publications

References 89 publications

Neogene-Recent Reactivation of Jurassic-age Faults in Southern Vietnam, with Implications for the Extrusion of Indochina

Neogene-Recent Reactivation of Jurassic-age Faults in Southern Vietnam, with Implications for the Extrusion of Indochina

Tectonic Stress Distribution in the Song Tranh 2 Hydropower Reservoir: Implication for Induced Earthquake

Preface for the special issue “Geology, geodynamics and mineral resources of SE Asia”. Insights from GeoSEA XV Congress, Hanoi, 2018

Contact Info

Product

Resources

About