气候变化领域集成服务门户(CCPortal): Petrogenesis and tectonic environment of the Middle Permian Luerma igneous complex in the southern Lhasa subterrane, Tibet: Evidence from geochemistry; Rb-Sr, Sm-Nd, and Lu-Hf isotopes; and zircon U-Pb geochronology

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DOI	10.1002/gj.4807
	Petrogenesis and tectonic environment of the Middle Permian Luerma igneous complex in the southern Lhasa subterrane, Tibet: Evidence from geochemistry; Rb-Sr, Sm-Nd, and Lu-Hf isotopes; and zircon U-Pb geochronology
	Liu, Hong; Li, Guangming; Li, Wenchang; Ma, Dongfang; Huang, Hanxiao; Cao, Huawen; Li, Youguo; Huang, Yong; Nie, Fei; Song, Wenjie
发表日期	2023
ISSN	0072-1050
EISSN	1099-1034
起始页码	3026
结束页码	3042
卷号	58 期号:8
英文摘要	Due to the lack of corresponding magmatic records, the timing of the opening of the Yarlung-Tsangpo Neo-Tethyan Ocean remains controversial. The Middle Permian Luerma igneous complex, which is situated in the western Gangdese magmatic belt of the southern Lhasa subterrane, western Tibet, can be divided into four or more rock types, including foid gabbro, amphibole gabbro, monzogabbro, and pyroxene-bearing monzodiorite. Through zircon U-Pb dating using laser ablation-inductively coupled plasma-mass spectrometry, the age of the Luerma igneous complex is determined to be similar to 261 Ma. The complex is rich in titanium, iron, magnesium, and total alkalis, with medium to high levels of calcium, potassium and aluminium, as well as low levels of silicon. Therefore, it is classified as a shoshonite-latite rock series. The complex is relatively enriched in light rare earth elements and high-field-strength elements, without obvious Eu and Ce anomalies. These rocks exhibit relatively low (Sr-87/Sr-86)(i) values, high epsilon(Nd)(t) values, and high epsilon(Hf)(t) values. The geochemical and isotopic characteristics indicate that the magmas are derived from partial melting of the upper mantle in an intraplate tectonic environment. The new data presented here provide supplementary evidence for the initial rifting of the Lhasa terrane from the northern margin of Gondwana during the Middle Permian. These data also confirm that the opening of the Yarlung-Tsangpo Neo-Tethyan Ocean occurred in the Middle Permian.
关键词	Daggyai Co Middle Permian opening of the Neo-Tethyan Ocean within-plate basalt Yawa
英文关键词	WHOLE-ROCK GEOCHEMISTRY; PORPHYRY COPPER BELT; VOLCANIC-ROCKS; CU-MO; CHINA CONSTRAINTS; TETHYAN HIMALAYA; OROGENIC BELT; AU DEPOSIT; GANGDESE; ORIGIN
WOS研究方向	Geosciences, Multidisciplinary
WOS记录号	WOS:001020316900001
来源期刊	GEOLOGICAL JOURNAL
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283230
作者单位	China Geological Survey; Chengdu Center, China Geological Survey; Chengdu University of Technology; Kunming University of Science & Technology; China Geological Survey; China Earthquake Administration; Institute of Disaster Prevention, CEA; China Geological Survey; Chengdu Center, China Geological Survey
推荐引用方式 GB/T 7714	Liu, Hong,Li, Guangming,Li, Wenchang,et al. Petrogenesis and tectonic environment of the Middle Permian Luerma igneous complex in the southern Lhasa subterrane, Tibet: Evidence from geochemistry; Rb-Sr, Sm-Nd, and Lu-Hf isotopes; and zircon U-Pb geochronology[J],2023,58(8).
APA	Liu, Hong.,Li, Guangming.,Li, Wenchang.,Ma, Dongfang.,Huang, Hanxiao.,...&Song, Wenjie.(2023).Petrogenesis and tectonic environment of the Middle Permian Luerma igneous complex in the southern Lhasa subterrane, Tibet: Evidence from geochemistry; Rb-Sr, Sm-Nd, and Lu-Hf isotopes; and zircon U-Pb geochronology.GEOLOGICAL JOURNAL,58(8).
MLA	Liu, Hong,et al."Petrogenesis and tectonic environment of the Middle Permian Luerma igneous complex in the southern Lhasa subterrane, Tibet: Evidence from geochemistry; Rb-Sr, Sm-Nd, and Lu-Hf isotopes; and zircon U-Pb geochronology".GEOLOGICAL JOURNAL 58.8(2023).