GEOCHRONOLOGIC AND GEOCHEMICAL EVIDENCE FOR PERSISTENCE OF SOUTH-DIPPING SUBDUCTION TO LATE PERMIAN TIME, LANGSHAN AREA, INNER MONGOLIA (CHINA): SIGNIFICANCE FOR TERMINATION OF ACCRETIONARY OROGENESIS IN THE SOUTHERN ALTAIDS

doi:10.2475/02.2014.08

	GEOCHRONOLOGIC AND GEOCHEMICAL EVIDENCE FOR PERSISTENCE OF SOUTH-DIPPING SUBDUCTION TO LATE PERMIAN TIME, LANGSHAN AREA, INNER MONGOLIA (CHINA): SIGNIFICANCE FOR TERMINATION OF ACCRETIONARY OROGENESIS IN THE SOUTHERN ALTAIDS
	Lin, Li'na 1,2; Xiao, Wenjia ; Wan, Bo 4; Windley, Brian F.3,5; Ao, Songjian 1,3; Han, Chunming 1; Feng, Jianyun 1,2; Zhang, Ji'en 1,3; Zhang, Zhiyong 1
刊名	AMERICAN JOURNAL OF SCIENCE
	2014-02-01
卷号	314 期号:2 页码:679-703
关键词	Langshan Permian accretionary tectonics North China Craton Andean-type arc
ISSN号	0002-9599
DOI	10.2475/02.2014.08
文献子类	Article
英文摘要	The Langshan area in Inner Mongolia is situated in the southern Altaids between the Beishan suture to the west and the Solonker suture to the east. This paper addresses the poorly known tectonic evolution that led to formation of the terminal Solonker suture. Dating of deformed porphyries and undeformed dolerites and gabbros constrains the timing of the relevant NE-E-striking and north-vergent deformation. Deformed granitic-granodioritic porphyries in this area are characterized by high SiO2 (65.38-78.00%), low TFe2O3 (1.29-5.07%), MgO (0.13-0.63%), and variable K2O (0.534.14%) and Na2O (2.05-4.62%). All samples have enriched LREE (La/Yb 6-18) and negative Nb anomalies (Nb-N/Th(N)0.09-0.48), but different Eu anomalies (Eu* <0.7 or similar to 1); these geochemical features can be ascribed to a heterogeneous source in a subduction-related environment. Gabbros and dolerites have 42.33 to 52.03 percent SiO2. All mafic samples have similar La/Yb ratios of 4 to 6 and negative Nb anomalies (Nb-N/Th-N) ratios of 0.2 to 0.8, suggestive of a subduction-related setting. Two granitic porphyries yielded U-238/Pb-206 weighted mean ages of 284.7 +/- 2.1 Ma with MSWD of 1.6 and 291.7 +/- 2: 2.1 Ma with MSWD of 1.14; these ages are consistent with U-235/Pb-207 and U-238/Pb-206 concordia ages of 281 +/- 17 Ma with MSWD of 0.87 and 289.8 +/- 9.2 Ma with MSWD of 0.66. A dolerite yielded concordia ages of 256.2 +/- 2.6 Ma with MSWD of 0.44 and 256 +/- 2.5 Ma with MSWD 0.45. The ages and geochemistry of the deformed porphyries indicate that in the early Permian there was important deformation and recrystallization in a subduction-related setting. The isotopic and geochemical signatures of all the rocks indicate that they formed during subduction-related conditions. We propose that Langshan was a Permian active continental margin arc built on the edge of the North China Craton by southward subduction, which led to closure of the ocean, concomitant formation of the Solonker suture in the late Permian-early Triassic, and termination of the accretion-subduction orogen of the southern Altaids.
WOS关键词	PHANEROZOIC CRUSTAL GROWTH ; SOLONKER SUTURE ZONE ; NW CHINA ; TECTONIC EVOLUTION ; CENTRAL-ASIA ; NORTHERN MARGIN ; CONTINENTAL MARGINS ; ZIRCON AGES ; TIEN-SHAN ; U-PB
WOS研究方向	Geology
语种	英语
出版者	AMER JOURNAL SCIENCE
WOS记录号	WOS:000334969200009
资助机构	Chinese National Basic Research 973 Program(2012CB416604 ; Chinese National Basic Research 973 Program(2012CB416604 ; Chinese National Basic Research 973 Program(2012CB416604 ; Chinese National Basic Research 973 Program(2012CB416604 ; National Natural Science Foundation of China(41390445 ; National Natural Science Foundation of China(41390445 ; National Natural Science Foundation of China(41390445 ; National Natural Science Foundation of China(41390445 ; One Hundred Talent Program B of the Chinese Academy of Sciences ; One Hundred Talent Program B of the Chinese Academy of Sciences ; One Hundred Talent Program B of the Chinese Academy of Sciences ; One Hundred Talent Program B of the Chinese Academy of Sciences ; National 305 Projects(2011BAB06B01 ; National 305 Projects(2011BAB06B01 ; National 305 Projects(2011BAB06B01 ; National 305 Projects(2011BAB06B01 ; 2014CB448000 ; 2014CB448000 ; 2014CB448000 ; 2014CB448000 ; 41230207 ; 41230207 ; 41230207 ; 41230207 ; 2007BAB25B04) ; 2007BAB25B04) ; 2007BAB25B04) ; 2007BAB25B04) ; 2007CB411307) ; 2007CB411307) ; 2007CB411307) ; 2007CB411307) ; 41390441 ; 41390441 ; 41390441 ; 41390441 ; 41190075 ; 41190075 ; 41190075 ; 41190075 ; 41272107) ; 41272107) ; 41272107) ; 41272107) ; Chinese National Basic Research 973 Program(2012CB416604 ; Chinese National Basic Research 973 Program(2012CB416604 ; Chinese National Basic Research 973 Program(2012CB416604 ; Chinese National Basic Research 973 Program(2012CB416604 ; National Natural Science Foundation of China(41390445 ; National Natural Science Foundation of China(41390445 ; National Natural Science Foundation of China(41390445 ; National Natural Science Foundation of China(41390445 ; One Hundred Talent Program B of the Chinese Academy of Sciences ; One Hundred Talent Program B of the Chinese Academy of Sciences ; One Hundred Talent Program B of the Chinese Academy of Sciences ; One Hundred Talent Program B of the Chinese Academy of Sciences ; National 305 Projects(2011BAB06B01 ; National 305 Projects(2011BAB06B01 ; National 305 Projects(2011BAB06B01 ; National 305 Projects(2011BAB06B01 ; 2014CB448000 ; 2014CB448000 ; 2014CB448000 ; 2014CB448000 ; 41230207 ; 41230207 ; 41230207 ; 41230207 ; 2007BAB25B04) ; 2007BAB25B04) ; 2007BAB25B04) ; 2007BAB25B04) ; 2007CB411307) ; 2007CB411307) ; 2007CB411307) ; 2007CB411307) ; 41390441 ; 41390441 ; 41390441 ; 41390441 ; 41190075 ; 41190075 ; 41190075 ; 41190075 ; 41272107) ; 41272107) ; 41272107) ; 41272107) ; Chinese National Basic Research 973 Program(2012CB416604 ; Chinese National Basic Research 973 Program(2012CB416604 ; Chinese National Basic Research 973 Program(2012CB416604 ; Chinese National Basic Research 973 Program(2012CB416604 ; National Natural Science Foundation of China(41390445 ; National Natural Science Foundation of China(41390445 ; National Natural Science Foundation of China(41390445 ; National Natural Science Foundation of China(41390445 ; One Hundred Talent Program B of the Chinese Academy of Sciences ; One Hundred Talent Program B of the Chinese Academy of Sciences ; One Hundred Talent Program B of the Chinese Academy of Sciences ; One Hundred Talent Program B of the Chinese Academy of Sciences ; National 305 Projects(2011BAB06B01 ; National 305 Projects(2011BAB06B01 ; National 305 Projects(2011BAB06B01 ; National 305 Projects(2011BAB06B01 ; 2014CB448000 ; 2014CB448000 ; 2014CB448000 ; 2014CB448000 ; 41230207 ; 41230207 ; 41230207 ; 41230207 ; 2007BAB25B04) ; 2007BAB25B04) ; 2007BAB25B04) ; 2007BAB25B04) ; 2007CB411307) ; 2007CB411307) ; 2007CB411307) ; 2007CB411307) ; 41390441 ; 41390441 ; 41390441 ; 41390441 ; 41190075 ; 41190075 ; 41190075 ; 41190075 ; 41272107) ; 41272107) ; 41272107) ; 41272107) ; Chinese National Basic Research 973 Program(2012CB416604 ; Chinese National Basic Research 973 Program(2012CB416604 ; Chinese National Basic Research 973 Program(2012CB416604 ; Chinese National Basic Research 973 Program(2012CB416604 ; National Natural Science Foundation of China(41390445 ; National Natural Science Foundation of China(41390445 ; National Natural Science Foundation of China(41390445 ; National Natural Science Foundation of China(41390445 ; One Hundred Talent Program B of the Chinese Academy of Sciences ; One Hundred Talent Program B of the Chinese Academy of Sciences ; One Hundred Talent Program B of the Chinese Academy of Sciences ; One Hundred Talent Program B of the Chinese Academy of Sciences ; National 305 Projects(2011BAB06B01 ; National 305 Projects(2011BAB06B01 ; National 305 Projects(2011BAB06B01 ; National 305 Projects(2011BAB06B01 ; 2014CB448000 ; 2014CB448000 ; 2014CB448000 ; 2014CB448000 ; 41230207 ; 41230207 ; 41230207 ; 41230207 ; 2007BAB25B04) ; 2007BAB25B04) ; 2007BAB25B04) ; 2007BAB25B04) ; 2007CB411307) ; 2007CB411307) ; 2007CB411307) ; 2007CB411307) ; 41390441 ; 41390441 ; 41390441 ; 41390441 ; 41190075 ; 41190075 ; 41190075 ; 41190075 ; 41272107) ; 41272107) ; 41272107) ; 41272107)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/85157]
专题	中国科学院地质与地球物理研究所
通讯作者	Xiao, Wenjia
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Xinjiang Res Ctr Mineral Resources, Urumqi 830011, Peoples R China 4.Stockholm Univ, Dept Geol Sci, S-10691 Stockholm, Sweden 5.Univ Leicester, Dept Geol, Leicester LE1 7RH, Leics, England
推荐引用方式 GB/T 7714	Lin, Li'na,Xiao, Wenjia,Wan, Bo,et al. GEOCHRONOLOGIC AND GEOCHEMICAL EVIDENCE FOR PERSISTENCE OF SOUTH-DIPPING SUBDUCTION TO LATE PERMIAN TIME, LANGSHAN AREA, INNER MONGOLIA (CHINA): SIGNIFICANCE FOR TERMINATION OF ACCRETIONARY OROGENESIS IN THE SOUTHERN ALTAIDS[J]. AMERICAN JOURNAL OF SCIENCE,2014,314(2):679-703.
APA	Lin, Li'na.,Xiao, Wenjia.,Wan, Bo.,Windley, Brian F..,Ao, Songjian.,...&Zhang, Zhiyong.(2014).GEOCHRONOLOGIC AND GEOCHEMICAL EVIDENCE FOR PERSISTENCE OF SOUTH-DIPPING SUBDUCTION TO LATE PERMIAN TIME, LANGSHAN AREA, INNER MONGOLIA (CHINA): SIGNIFICANCE FOR TERMINATION OF ACCRETIONARY OROGENESIS IN THE SOUTHERN ALTAIDS.AMERICAN JOURNAL OF SCIENCE,314(2),679-703.
MLA	Lin, Li'na,et al."GEOCHRONOLOGIC AND GEOCHEMICAL EVIDENCE FOR PERSISTENCE OF SOUTH-DIPPING SUBDUCTION TO LATE PERMIAN TIME, LANGSHAN AREA, INNER MONGOLIA (CHINA): SIGNIFICANCE FOR TERMINATION OF ACCRETIONARY OROGENESIS IN THE SOUTHERN ALTAIDS".AMERICAN JOURNAL OF SCIENCE 314.2(2014):679-703.