Petrogenesis of volcanic rocks in the Sangxiu Formation, central segment of Tethyan Himalaya: A probable example of plume–lithosphere interaction

Zhu, Di‐Cheng; Gong, Ping; Mo, Xuanxue; Zhongli, Liao; Jiang, Xinwei; Wang, Liquan; Zhao, Zhidan

doi:10.1016/j.jseaes.2005.12.004

Cited by 110 publications

(72 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For this reason, some workers used Nd isotopic compositions to differentiate major Himalayan units [8,11,13,[23][24][25][26] . The existing Nd and Sr isotopic data suggest Nd model ages of the THS between 1.14 and 2.31 Ga, ε Nd (0) values between −20.05 and −6.16, and 87 Sr/ 86 Sr initial ratios between 0.705 and 0.750 [24][25][26][27][28][29] . The GHC and THS have similar Nd composition with ε Nd (0) between −19.06 and −6.16 [8,11,12,22,23,[25][26][27][30][31][32] .…”

Section: Introductionmentioning

confidence: 96%

Nd isotopic compositions of the Tethyan Himalayan Sequence in southeastern Tibet

Dai

Yin

Liu

et al. 2008

Sci. China Ser. D-Earth Sci.

View full text Add to dashboard Cite

The Himalayan orogen consists of three major lithologic units that are separated by two major north-dipping faults: the Lesser Himalayan Sequence (LHS) below the Main Central Thrust (MCT), the Greater Himalayan Crystalline Complex (GHC) above the MCT, and the Tethyan Himalayan Sequence (THS) juxtaposed by the South Tibet Detachment fault (STD) over the GHC. Due to widespread metamorphism and intense deformation, differentiating the above three lithologic units is often difficult. This problem has been overcome by the use of Sm-Nd isotopic analysis. The previous studies suggested that the LHS can be clearly distinguished from the GHC and THS by their Nd isotope compositions. However, the lack of detailed and systematic Sm-Nd isotopic studies of the THS across the Himalaya in general has made differentiation of this unit from the nearby GHC impossible, as the two appear to share overlapping Nd compositions and model ages. To address this problem, we systematically sampled and analyzed Nd isotopes of the THS in southeastern Tibet directly north of Bhutan. Our study identifies two distinctive fields in a ε Nd -T DM plot. The first is defined by the ε Nd (210 Ma) values of −3.45 to −7.34 and T DM values of 1.15 to 1.29 Ga from a Late Triassic turbidite sequence, which are broadly similar to those obtained from the Lhasa block. The second field is derived from the Early Cretaceous meta-sedimentary rocks with ε Nd (130 Ma) values from −15.24 to −16.61 and T DM values from 1.63 to 2.00 Ga; these values are similar to those obtained from the Greater Himalayan Crystalline Complex in Bhutan directly south of our sampling traverse, which has ε Nd (130 Ma) values of −10.89 to −16.32 and Nd model ages (T DM ) of 1.73 to 2.20 Ga. From the above observations, we suggest that the Late Triassic strata of the southeast Tibetan THS were derived from the Lhasa block in the north, while the Early Cretaceous strata of the THS were derived from a source similar to the High Himalayan Crystalline Complex or Indian craton in the south. Our interpretation is consistent with the existing palaeocurrent data and provenance analysis of the Late Triassic strata in southeastern Tibet, which indicate the sediments derived from a northern source. Thus, we suggest that the Lhasa terrane and the Indian craton were close to one another in the Late Triassic and were separated by a rift valley across which a large submarine fan was transported southward and deposited on the future northern margin of the Indian continent.

show abstract

Section: Introductionmentioning

confidence: 96%

Nd isotopic compositions of the Tethyan Himalayan Sequence in southeastern Tibet

Dai

Yin

Liu

et al. 2008

Sci. China Ser. D-Earth Sci.

View full text Add to dashboard Cite

show abstract

“…Literature data also show that ~132 Ma mafic members of this LIP to the south and west of Dala are characterized by slightly more unradiogenic Nd (ε Nd (t) = +1.6-+4.3) and radiogenic Sr ( 87 Sr/ 86 Sr(t) = 0.7040-0.7070) isotopic compositions and higher Nb/La (> 0.75) ratios (Zhu et al, 2007(Zhu et al, & 2008Xia et al, 2014;Liu et al, 2015) than…”

Section: Nature Of the Mantle Source For The Dala Diabase Rocksmentioning

confidence: 80%

“…10). (1) (Zhu et al, 2007(Zhu et al, & 2008Xia et al, 2014;Liu et al, 2015) is widely distributed in the Comei LIP, including the Cona, Rimowa and Gyangze areas (Fig. 1).…”

Section: Accepted Manuscript 27mentioning

confidence: 99%

“…Previous studies have demonstrated that the Comei-Bunbury LIP represents mafic magmatism associated with the break-up of the Eastern Gondwana continent due to impingement of the Kerguelen plume (Zhu et al, 2007(Zhu et al, & 2009Liu et al, 2015).…”

Section: Nature Of the Mantle Source For The Dala Diabase Rocksmentioning

confidence: 99%

“…10), are interpreted to be silicic melts derived from anatexis of shallow crustal materials, triggered by heat input from the Kerguelen mantle plume (Zhu et al, 2007;Liu et al, 2015). In contrast, most of the mafic rocks represent mantle-derived magma.…”

Section: Accepted Manuscript 27mentioning

confidence: 99%

See 2 more Smart Citations

Early Cretaceous high-Ti and low-Ti mafic magmatism in Southeastern Tibet: Insights into magmatic evolution of the Comei Large Igneous Province

Wang

Zeng

Asimow

et al. 2018

Lithos

View full text Add to dashboard Cite

ABSTRACT:The Dala diabase intrusion, at the southeastern margin of the Yardoi gneiss dome, is located within the outcrop area of the ~132 Ma Comei Large Igneous Province (LIP), the result of initial activity of the Kerguelen plume. We present new zircon U-Pb geochronology results to show that the Dala diabase was emplaced at ~132 Ma and geochemical data (whole-rock element and Sr-Nd isotope ratios, zircon processes. In many other localities, however, primitive magmas are absent and observed Ti contents of evolved magmas cannot be quantitatively related to source processes. Careful examination of the petrogenetic relationship between co-existing low-Ti and high-Ti mafic rocks is essential to using observed rock chemistry to infer source composition, location, and degree of melting.

show abstract

Geochronology and geochemistry of the Late Jurassic bimodal volcanic rocks from Hailisen area, central‐southern Great Xing'an Range, Northeast China

et al. 2017

View full text Add to dashboard Cite

Zircon U–Pb dating and whole‐rock geochemical analysis have been studied on the Late Jurassic volcanic rocks in the Hailisen area, Northeastern China, with the aim of constraining the tectonic evolution of the central‐southern Great Xing'an Range during the Late Jurassic. The volcanic rocks mainly consist of andesite from the Tamulangou Formation, and rhyolite and minor dacite from the Manketouebo Formation. The results of inductively coupled plasma‐mass spectrometry Zircon U–Pb dating for two andesites and one dacite indicate that they formed in the Late Jurassic (161–150 Ma). The mafic rocks are characteristic of low TiO2 (1.01–1.04 wt.%) and P2O5 (0.23–0.31 wt.%) contents, and high Al2O3 (17.19–20.18 wt.%) and CaO (6.69–7.45 wt.%) contents, and belong to the low‐K tholeiitic series. These mafic rocks are also characterized by moderately enriched light rare earth element (LREE) patterns and high abundances of Th, U, Zr, and Hf but negative Nb, Ta, and Ti anomalies. The felsic rocks are enriched in alkalis, Th, U, and LREEs; depleted in Ba, Sr, Nb, Ta, and Ti; and exhibit moderately LREE‐enriched patterns. These features indicate that the mafic volcanic rocks were likely formed by the partial melting of a lithospheric mantle that was metasomatized by subduction‐derived components, but the felsic rocks could derived by partial melting of a crustal source. The Tamulangou and Manketouebo formations have compositions of typical bimodal volcanism, an extensional environment, similar to a post‐orogenic setting, which might be related to the closure of Mongol–Okhotsk Ocean.

show abstract

Petrogenesis of volcanic rocks in the Sangxiu Formation, central segment of Tethyan Himalaya: A probable example of plume–lithosphere interaction

Cited by 110 publications

References 47 publications

Nd isotopic compositions of the Tethyan Himalayan Sequence in southeastern Tibet

Nd isotopic compositions of the Tethyan Himalayan Sequence in southeastern Tibet

Early Cretaceous high-Ti and low-Ti mafic magmatism in Southeastern Tibet: Insights into magmatic evolution of the Comei Large Igneous Province

Geochronology and geochemistry of the Late Jurassic bimodal volcanic rocks from Hailisen area, central‐southern Great Xing'an Range, Northeast China

Contact Info

Product

Resources

About