Nguyen Van Vuong

VNU University of Science Hanoi · Faculty of Geology

The timing and mechanism of the combination between the South China Block (SCB) and the Indochina Block (IB) are controversial. Three ophiolitic mélange zones (Ailaoshan, Song Ma, and Song Chay) have been proposed as suture zones within this collisional orogen. However, the relationships among the three corresponding tectonic belts are unclear. In...

During the Late Paleozoic to Cenozoic, with the closure of the Tethys oceans, the East and/or Southeast Asia was amalgamated by individual blocks. In order to understand the Paleogeography of the Eastern Paleo-Tethys, a systematic UPb dating on 11 samples have conducted to constrain the age and provenance of the elements forming the Ailaoshan-Song...

The location of the suture zone between the South China Block (SCB) and the Indochina Block (IB) is disputed. Recently, along the Song Chay (Chay river) belt, a mélange zone was proposed as a potential suture zone of the SCB and IB. However, the provenance and age of the Song Chay mélange is poorly known. In order to better constrain the age and pr...

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-south...

The Neoproterozoic to Early Triassic tectono-stratigraphic evolution of Indochina and adjacent areas can be divided into six mega-episodes: (1) The Neoproterozoic-Early Cambrian mega-episode was characterized by shallow marine environment in the Sino-Vietnam composite terrane. Meanwhile, the different blocks of the Indochina composite terranes were...

The tectonics of the Indochina continental margin before and after the Neogene-Quaternary basalt eruption is poorly understood. The analysis of 1500 striated faults observed in different rocks, mostly from volcano-plutonic rocks with ages ranging from Cretaceous to Quaternary, at more than 140 locations in south central Vietnam by direct inversion...

Geologic characteristic controls the development of high-flux hydrothermal conduits that geothermal system formation which is evaluated at large and small scales in the Northern part of Vietnam. There are also several active fault zones here including the Red River fault zone (RRFZ), and Dien Bien-Lai Chau fault zone (DBLCFZ) which have been shown...

This paper aim to review currently four main approaches to paleoenvironment and paleoclimate research including: 1) paleotonlogy, 2) sedimentology, 3) major and trace element geochemistry, 4) stable isotopes. Sedimentary and geochemical proxies are widely used for many different sedimentary environments and ages. Paleontological proxies have limita...

In Central Vietnam, the Kontum massif is subdivided from North to South into: (i) Kham Duc, (ii) Ngoc Linh, (iii) Kan Nack complexes. The Kham Duc complex consists of metapelite, metapsammite, paragneiss, metagabbro, amphibolite, serpentinized ultramafic, and orthogneiss blocks. The southern part of this complex experienced an Early Paleozoic crust...

The Dong Ho sedimentary formation consists of gravel, sand and sandstone, mudstone interbeded with asphalt layer or oil shale cropping out at Quang Ninh is considered as outcrop of petroleum potential source rock and correlated to source rock of the Cenozoic basins on the continental shelf of Southeast Asia. Geochemical investigation of major and t...

Multiradioactive ages and thermo-tecnonic evolution of the ophiolitic rocks along Song Ma deformation zone

Elongate Miocene gneissose and granitic domes in northern Vietnam formed in a dextral-transpressional ductile shear regime, possibly associated with large-scale restraining step-overs along dextral faults. Initial anticlinal D1 doming involved folding of both basement and hanging wall rocks with D1 secondary folds that verge toward the anticlinal a...

This study uses new field observations and existing studies to shed new light on the origin and significance of two NW–SE striking orogens in NW and NE Vietnam. We conclude that the architecture of each belt is a stack of NE-directed nappes formed either under deep ductile synmetamorphic conditions, or under shallow depth in the SW and NE parts, re...

Pelitic and semipelitic anatectic granulites form one of the major lithological units in Kan Nack complex of the Kon Tum massif (in south-central Vietnam), which comprises HT metamorphic and magmatic rocks including granulites and charnockites is classically regarded as the older part of the Gondwana-derived Indosinia terrain. Metamorphic evolution...

The Dien Bien Phu (DBP) Fault strikes nearly perpendicular to the general tectonic framework, separating northwest Vietnam into two compartments. The DBP and Muong Lay granites are exposed respectively east and west of the fault. The U/Pb age of 277 ± 2 Ma obtained for the Muong Lay granite is similar to the age of the Chieng Khuong complex exposed...

Eutrophication is a natural process of enrichment of water by nutrients, however, in many cases is considered as one of the major factors of water pollution affecting the coastal ecosystem. Selection and application of suitable indicator and method to assess sea eutrophication are almost important. This study aims at clarifying water eutrophic stat...

Các thông số kích thước hạt trầm tích luôn biến đổi trong các môi trường trầm tích khác nhau như môi trường sông, bãi biển, sa mạc v.v. Tuy nhiên, sự biến đổi theo không gian của các thông số đó cũng diễn ra trong cùng một môi trường trầm tích, tương ứng với hướng di chuyển trầm tích. McLaren và Bowles đã chỉ ra rằng các thông số kích thước hạt trầ...

A careful re-examination of the previous tectonic descriptions and the acquisition of new structural and kinematic data have been undertaken in northeastern Vietnam. The structure of the area consists of a system of slightly metamorphosed but ductilely deformed nappes, including recumbent folds, formed during the Triassic, prior to the unconformabl...

The Early Mesozoic tectonic and geodynamic evolutions of the South China Block (SCB) are still debated questions. Along the southern margin of the SCB, the Yunkai and Song Chay massifs are key regions to address these questions. In both of these massifs, an Early Mesozoic ductile deformation with thrust and folds structures have been observed. In t...

The NNE-SSW-trending Dien Bien Phu fault, which dextrally displaces the NW-SE-trending Song Ma suture, in northwestern Vietnam, is widely considered one of the most seismically active faults in Indochina. In order to better understand the fault's activity, this study reports new Ar-40/Ar-39 geochronological data for mica schists and mylonites from...

The Si Phai Formation at the lectostratotype is not completely exposed by some tectonic faults that occurs between its upper part and the overlying Tốc Tát Formation. The highest part of the Si Phai Formation is discovered at the Mã Pì Lèn section and is composed of limestone interbedded with siliceous limestone bearing tentaculite and conodont fos...

Some geological values of Dong Van - Meo Vac rockyr highland in term of geopark creation

In Vietnam, the Triassic Indosinian collision affected coevally the Truong Son belt and the Kontum Massif,which were not independent tectonic units, but parts of the same Gondwana-derived Indochina continental block. This thermotectonic event took place synchronously throughout Vietnam, during the Lower Triassic 250–240-Ma time interval, as demonst...

Con Voi range in Vietnam was a southeastward continuity of the Red River Ailaoshan tertiary shear zone, a boundary between Indochina and south China blocks during the southeastward extrusion of Indochina block. It composed of high grade metamorphic and strongly deformed rocks with various protoliths. The foliation and schistosity folded to produce...

New structural field data at various scale and 40Ar–39Ar geochronological results, from the basement rocks in the Truong Son belt and Kontum Massif of Vietnam, confirm that ductile deformation and high-temperature metamorphism were caused by the Early Triassic event of the Indosinian Orogeny in the range of 250–240 Ma. A compilation of isotopic dat...

A large Oligocene-Miocene extensional gneiss dome in Vietnam has implications for the kinematics of the Ailao Shan Red River shear zone and rifting of the South China Sea. A major northeast-dipping extensional shear zone separates the Bu Khang dome from less-metamorphosed units above. Shearing deformation occurred during the exhumation of high-pres...

Several NW-trending ductile and partly mylonitic shear zones cross the Truong Son belt of Central Vietnam, along the Song Ma and Song Ca valleys and, north of the Kontum block, from Da Nang to Aluoi and Khe Sanh. High-grade metamorphic rocks of amphibolite facies, showing a retrograde evolution and consisting of ortho- and paragneisses, metavolcani...

Quaternary depressions in Vietnam (namely the Cuulong River, the Red River, and coastal depressions in the central part of the country) were filled mainly by continental deposits in five cycles as follows: (V) Upper Holocene (Thaibinh and Dongkhoi formations); (IV) Lower to Middle Holocene (Haihung and Tanthanh Binh-chanh formations); (III) Upper P...