Stages of late Paleozoic to early Mesozoic magmatism in the Song Ma belt, NW Vietnam: evidence from zircon U–Pb geochronology and Hf isotope composition

Hiếu, Phạm Trung; Li, Shuangqing; Yu, Yang; Thanh, Ngo Xuan; Dung, Le Tien; Tu, Vu Le; Siebel, Wolfgang; Chen, Fukun

doi:10.1007/s00531-016-1337-9

Cited by 45 publications

(58 citation statements)

References 57 publications

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“…2; Appendix 1). This is furthermore consistent with the 239 ± 6 Ma age obtained on the Song Ma Granite (Hieu et al, 2017), intrusive within the Dong Trau Fm. (Son et al, 2005).…”

Section: Depositional Environments and Ages Of The Triassic Formationssupporting

confidence: 89%

“…Furthermore, the Dong Trau Fm. is crosscut by the Song Ma Granite (Son et al, 2005), emplaced between 263 ± 5 Ma and 239 ± 6 Ma (Hieu et al, 2017). The oldest intrusion age, at 263 ± 5 Ma (Fig.…”

Section: Stratigraphic Frameworkmentioning

confidence: 93%

“…The Song Da Basin is classically interpreted as a continental rift, sometimes referred to as the Song Da -Tu Le Rift (e.g., Shi G.R. and Shen S.-Z., 1998;Golotov et al, 2001;Balykin 2010;Anh et al, 2011;Tri and Khuc, 2011;Metcalfe, 2012;Hieu et al, 2013Hieu et al, , 2017Tran et al, 2015). The extension of the lithosphere associated with the rift formation has been proposed to evolve up to the formation of an oceanic lithosphere within the Song Da Basin (Liu J. et al, 2012).…”

Section: The Basement Of the Song Da Basin Is Heterogeneous And Inclumentioning

confidence: 99%

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The Indosinian orogeny: A perspective from sedimentary archives of north Vietnam

Rossignol

Bourquin

Hallot

et al. 2018

Journal of Asian Earth Sciences

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The Triassic stratigraphic framework for the Song Da and the Sam Nua basins, north Vietnam, suffers important discrepancies regarding both the depositional environments and ages of the main formations they contain. Using sedimentological analyses and dating (foraminifer biostratigraphy and U-Pb dating on detrital zircon), we provide an improved stratigraphic framework for both basins. A striking feature in the Song Da Basin, located on the southern margin of the South China Block, is the diachronous deposition, over a basal unconformity, of terrestrial and marine deposits. The sedimentary succession of the Song Da Basin points to a foreland setting during the late Early to the Middle Triassic, which contrasts with the commonly interpreted rift setting. On the northern margin of the Indochina Block, the Sam Nua Basin recorded the activity of a proximal magmatic arc during the late Permian up to the Anisian. This arc resulted from the subduction of a southward dipping oceanic slab that separated the South China block from the Indochina block. During the Middle to the Late Triassic, the Song Da and Sam Nua basins underwent erosion that led to the formation of a major unconformity, resulting from the erosion of the Middle Triassic Indosinian mountain belt, built after an ongoing continental collision between the South China and the Indochina blocks. Later, during the Late Triassic, as syn-to post-orogenic foreland basins in a terrestrial setting, the Song Da and Sam Nua basins experienced the deposition of very coarse detrital material representing products of the mountain belt erosion.

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“…2; Appendix 1). This is furthermore consistent with the 239 ± 6 Ma age obtained on the Song Ma Granite (Hieu et al, 2017), intrusive within the Dong Trau Fm. (Son et al, 2005).…”

Section: Depositional Environments and Ages Of The Triassic Formationssupporting

confidence: 89%

Section: Stratigraphic Frameworkmentioning

confidence: 93%

Section: The Basement Of the Song Da Basin Is Heterogeneous And Inclumentioning

confidence: 99%

See 1 more Smart Citation

The Indosinian orogeny: A perspective from sedimentary archives of north Vietnam

Rossignol

Bourquin

Hallot

et al. 2018

Journal of Asian Earth Sciences

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“…It was done via laser ablation attached to inductively coupled plasma mass spectrometry. Particular analytical processes were shown by Hieu et al (). In situ Hf isotope analyses were carried out at the Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, through the laser ablation inductively coupled plasma mass spectrometry method.…”

Section: Analytical Techniquesmentioning

confidence: 99%

Geochemical and geochronological studies of the Muong Hum alkaline granitic pluton from the Phan Si Pan Zone, northwest Vietnam: Implications for petrogenesis and tectonic setting

2018

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The Phan Si Pan zone in northwest Vietnam is an important tectonic unit for understanding the geological evolution of the southeast Asian Block. Numerous late Permian A‐type granites outcrop in this zone. In this study, new geochemical and geochronological data derived from the Muong Hum alkaline granitic pluton in the Phan Si Pan zone were investigated for its petrogenesis and tectonic setting. Zircon U–Pb analyses of three samples yielded 206Pb/238U ages of (251.1 ±3.5) Ma, (251.2 ±3.8) Ma, and (253.9 ±1.5) Ma, respectively, coinciding with the ages of the acid member of magma from Emeishan large igneous province, southwest China. The Muong Hum granite has 10 000 × Ga/Al and A/CNK values of 4.70–4.93 and 0.87–0.90, respectively, as well as negative Eu anomalies. It shows significant depletion of Ba, Sr, Ti, and P, similar to features of A‐type granite. Zircons have positive εHf(t) values (+1.9 to +8.6) and Hf model ages (TDM1) of 595–846 Ma, originating a mantle source. Compared with the Panzhihua A‐type granite of the southwest China domain and other A‐type plutons of the Phan Si Pan zone, including Ye Yen Sun, Phu Sa Phin, Nam Xe, Tam Duong Phan Si Pan, and Taihe, the geochemical characteristics and zircon Hf isotopic compositions of the Muong Hum granite demonstrate an affinity of mantle magma. It is believed that the Phan Si Pan zone is an important part of Emeishan large igneous province. It was reworked by the Cenozoic Aillaoshan‐Red River shear fault to its present location.

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“…Đồng vị Hf trong đơn khoáng zircon được phân tích trùng với vị trí điểm phân tích tuổi U-Pb zircon, được thực hiện tại phòng thí nghiệm MC-ICP-MS Viện Vật lý Địa cầu và Địa chất thuộc Viện Hàn lâm Khoa học Trung Quốc, thiết bị gồm khối phổ kế đẳng ly tử Neptune nhiều đầu tiếp nhận và hệ thống lấy mẫu Laser chuẩn phân tử Geolas 193 nm [2,7]. Đường kính của điểm phân tích là 60 μm, thời gian bào mòn cho phân tích một điểm khoảng 26 giây, điểm bào mòn có độ sâu 40-50 μm.…”

Section: Vật Liệu Và Phương Phápunclassified

U-Pb zircon and Hf composition of granite Song Ma block

Nguyen¹,

Tran²,

Nguyen³

et al. 2019

Sci. Tech. Dev. J. - Nat. Sci.

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Tóm tắt-Các đá granit khối Sông Mã chủ yếu gồm hai loại là granit biotit và granit hornblend-biotit. Granit biotit bao gồm các khoáng vật như plagioclas (35-45%); feldspar kali (25-35%); thạch anh (20%) và biotit (10%). Granit hornblend-biotit với thành phần plagioclas (40-50%); feldspar kali (10-15%); hornblend (5-10%) và biotit (5%). Phân tích bằng phương pháp lazer quang phổ phát xạ plasma -khối phổ cảm ứng LA-ICP-MS (Laser Ablation Inductively Coupled Plasma Mass Spectrometry) U-Pb zircon cho ba mẫu granit khối Sông Mã V0741, V0856, V1006, thu được các kết quả tuổi 206 Pb/ 238 U trung bình lần lượt là 257±4 triệu năm (Tr.n), 262±3 Tr.n và 241±6 Tr.n. Các kết quả tuổi này cổ hơn so với các kết quả đã công bố trước đây. Tập hợp các khoáng vật và đặc điểm địa hóa cho thấy chúng thuộc loại I-granit. Kết quả phân tích thành phần đồng vị Hf cho giá trị εHf(t) từ +7,3 đến +13,9 chứng tỏ nguồn gốc granit khối Sông Mã tương đồng với granit khu vực Phan Si Pan, Tây Bắc Việt Nam trong giai đoạn cuối Permi -đầu Trias. Từ khoá-I-granit, khối Sông Mã, U-Pb zircon, thành phần đồng vị Hf 1 MỞ ĐẦU hối sông Mã phân bố ở bờ phía Nam sông Mã, thuộc tỉnh Sơn La. Các thành tạo granitoit á núi lửa của khối này được xếp vào thời kì Trias giữa dựa trên quan hệ địa chất với các đá núi lửa felsic hệ tầng Đồng Trầu. Trong khi đó, các kết quả phân tích tuổi đồng vị Rb-Sr của granit á núi lửa khu vực Hoành Sơn cho giá trị 218±6 Tr.n

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Stages of late Paleozoic to early Mesozoic magmatism in the Song Ma belt, NW Vietnam: evidence from zircon U–Pb geochronology and Hf isotope composition

Cited by 45 publications

References 57 publications

The Indosinian orogeny: A perspective from sedimentary archives of north Vietnam

The Indosinian orogeny: A perspective from sedimentary archives of north Vietnam

Geochemical and geochronological studies of the Muong Hum alkaline granitic pluton from the Phan Si Pan Zone, northwest Vietnam: Implications for petrogenesis and tectonic setting

U-Pb zircon and Hf composition of granite Song Ma block

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