Cretaceous Strike-Slip Dislocations in the Dalat Zone (Southeastern Vietnam)

Kasatkin, S. A.; Phách, Phùng Văn; Anh, Le Duc; Golozubov, V. V.

doi:10.1134/s1819714017060033

Cited by 6 publications

(28 citation statements)

References 23 publications

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“…It resulted from subduction of the Pacific plate under the Eurasian continent. In the Jurassic-Cretaceous period, the relief of the SE China and SE Vietnam region was similar to the present Andes Mountain range of America [Honza, Fujioka, 2004;Hutchison, 2007;Tran Van Tri, Vu Khuc, 2010;Yan et al, 2014;Kasatkin et al, 2017]. The Zhejiang -Da Lat volcanoplutonic belt stopped its activity at the end of Cretaceous.…”

Section: Introductionmentioning

confidence: 89%

“…After a significant period of quescence, RRFZ activated again as rightlateral slip. Such movement marked a new tectonic subphase, which lasts to the present day [Tapponnier et al, 1986;Fyhn et al, 2009;Kasatkin et al, 2017]. According to [Tapponnier et al, 1986], due to continuous movement of the India continent, the sense of slip along RRFZ changed from left-to right-lateral because the China block began to move faster to the east, while the Indosinian block remained stable.…”

Section: Tectonic Phases Of the Scvn Regionmentioning

confidence: 99%

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Tectonic evolution of the southern part of Central Viet Nam and the adjacent area

Phách

Anh

2018

Geodin. tektonofiz.

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Interpretations of seismic, gravity and magnetic anomalies and structural data on the coastal zone of southern part of Central Viet Nam (SCVN) and the adjacent Tertiary basins suggest several phases in the tectonic evolution of the study region since the Late Cretaceous to Quaternary. In this paper, we try to clarify the tectonic evolution of SCVN and the adjacent continental margin. The Cretaceous – Paleocene tectonic phase commenced after cessation of the West Pacific plutonic magmatic activity that produced numerous diabases and aplite dykes of mainly sub-meridian orientation. It was characterized by N–S compression and E–W extension. The geomorphology and geology ofSE Asiawere considerably changed during the Neotectonic phases caused by collision between the Indian plate and the Eurasian continent. Two tectonic phases – Early and Late Neotectonic – are separated by a regional unconformity represented by a boundary surface between below strongly deformed strata (synrift) and above less deformed formations (post-rift). The Early Neotectonic phase was related to the left-lateral movement of the Red River Fault Zone (RRFZ) and includes two tectonic sub-phases: Eocene – Oligocene (NW–SE compression), and Oligocene – Miocene (E–W compression). Activity in the Oligocene-Miocene sub-phase gave birth to rift basins in the continental margin of the SCVN. The Late Neotectonic phase began since the RRFZ stopped left-lateral movement and the East Viet Nam (orSouth China) Sea stopped spreading. The Late Neotectonic phase is also divided into two tectonic sub-phases: Late Early Miocene (sub-meridian compression), and Late Miocene – Pliocene (NE–SW compression). The Late Miocene – Pliocene sub-phase is characterized by vertical movements that caused episodic uplifting of the onland terrains, and subsidence of the offshore Phu Khanh basin. Besides, Miocene – Pliocene-Quarternary basaltic eruptions were widespread all over the southern Indosinian terrain and the continental margin.

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Section: Introductionmentioning

confidence: 89%

Section: Tectonic Phases Of the Scvn Regionmentioning

confidence: 99%

Tectonic evolution of the southern part of Central Viet Nam and the adjacent area

Phách

Anh

2018

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“…Tectonics 10.1029/2023TC008231 2.4. Identification of Regional-Scale Lithospheric Sectors Kasatkin et al (2017) mapped a series of large-scale strike-slip faults that divide the study area into discrete lithospheric sectors with distinct basement lithologies (Figure 2). The northernmost sector, the Quang Nam sector (Figure 2), consists of a Precambrian to Paleozoic accretionary belt (Anh et al, 2021;Tung & Tri, 1992) bounded by the Tam-Ky Phuoc Son Shear Zone (TKPSSZ) to the south and the East Vietnam Transfer Zone (EVTZ) to the east.…”

Section: Extensional Tectonicsmentioning

confidence: 99%

Neogene‐Recent Reactivation of Pre‐Existing Faults in South‐Central Vietnam, With Implications for the Extrusion of Indochina

Richard,

Burberry,

Hoang

et al. 2024

Tectonics

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Vietnam contains complex faults coupled with a diffuse igneous province that has been active since the mid‐Miocene. However, existing fault maps demonstrate little consensus over the location of Neogene basalt flows and relative ages of mapped faults, which complicates interpretations of tectonic model for the evolution of Indochina. This paper identifies discrete tectonic blocks within Vietnam and aims to define the Neogene‐Recent tectonic setting and kinematics of south‐central Vietnam by analyzing the orientation, kinematics, and relative ages of faults across each block. Fault ages and relative timing are estimated using cross‐cutting relationships with dated basalt flows and between slickenside sets. Remote sensing results show distinct fault trends within individual blocks that are locally related to the orientations of the basement‐involved block‐bounding faults. Faults observed in the field indicate an early phase of dip‐slip motion and a later phase of strike‐slip motion, recording the rotation of blocks within a stress field. Faulting after the change in motion of the Red River Fault Zone at ∼16 Ma is inferred, as faults cross‐cut basalt flows as young as ∼0.6 Ma. Strike‐slip motion on block‐bounding faults is consistent with rotation and continuous extrusion of each block within south‐central Vietnam. The rotation of the blocks is attributed to the “continuum rubble” behavior of small crustal blocks influenced by upper mantle flow after the collision between India and Eurasia. We infer a robust lithospheric‐asthenospheric coupling in the extrusion model, which holds implications for other regions experiencing extrusion even in the absence of a free surface.

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“…MBT, Main Boundary Thrust; SF, Sagaing Fault; NF, Nanting Fault; TPF, Three Pagodas Fault; WCF, Wang Chao Fault; EVTZ, East Vietnam Transfer Zone; RRF, Red River Fault; DBPF, Dien Bien Phu Fault. b) Block map of the wider study area after Kasatkin et al (2017). Red lines mark faults, grey areas are volcanic centers.…”

Section: Figurementioning

confidence: 99%

“…The scenario is further complicated by the recognition by local workers (e.g. Kasatkin et al, 2017) of major strike-slip faults within the Indochina block that dissect southern Vietnam, forming the Da Lat and associated blocks ( Figure 1b), and suspected to be lithospheric in scale. 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.…”

Section: Introductionmentioning

confidence: 99%

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

Burberry¹,

Elkins²,

Hoang³

et al. 2019

Preprint

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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.

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Cretaceous Strike-Slip Dislocations in the Dalat Zone (Southeastern Vietnam)

Cited by 6 publications

References 23 publications

Tectonic evolution of the southern part of Central Viet Nam and the adjacent area

Tectonic evolution of the southern part of Central Viet Nam and the adjacent area

Neogene‐Recent Reactivation of Pre‐Existing Faults in South‐Central 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

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