Geochronology, mineralogy and geochemistry of alkali-feldspar granite and albite granite association from the Changyi area of Jiao-Liao-Ji Belt: Implications for Paleoproterozoic rifting of eastern North China Craton

doi:10.1016/j.precamres.2015.04.021

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院矿产资源研究重点实验室

	Geochronology, mineralogy and geochemistry of alkali-feldspar granite and albite granite association from the Changyi area of Jiao-Liao-Ji Belt: Implications for Paleoproterozoic rifting of eastern North China Craton
	Lan, Ting-Guang 1,2; Fan, Hong-Rui 2; Yang, Kui-Feng 2; Cai, Ya-Chun 2; Wen, Bo-Jie 2; Zhang, Wen 3
刊名	PRECAMBRIAN RESEARCH
	2015-09-01
卷号	266 页码:86-107
关键词	A-type granite Albite granite Paleoproterozoic Continental rift Jiao-Liao-Ji Belt North China Craton
DOI	10.1016/j.precamres.2015.04.021
文献子类	Article
英文摘要	Paleoproterozoic granites, divided into alkali-feldspar granite and albite granite, were newly discovered in the Changyi area of the Jiao-Liao-Ji Belt from the Eastern Block of the North China Craton. LA-ICP-MS zircon U-Pb dating shows that the alkali-feldspar granite was emplaced at 2193 Ma, whereas the albite granite intruded at 2171 Ma. These granites have high SiO2, Na2O + K2O, Zr, Nb, Ga, Y and HREE contents and show remarkably low CaO, Eu, Ba and Sr concentrations, strongly suggesting their A-type affinities. Zircon saturation thermometry and Al-T-in-biotite geobarometer indicate that the alkali-feldspar granite crystallized at temperatures of 823-856 degrees C (averaging at 839 degrees C) and pressures of 1.54-2.73 kbar (averaging at 2.05 kbar) while the albite granite was cooled at the temperatures of 851-853 degrees C and the pressures of 2.34-2.64 kbar (averaging at 2.45 kbar). Combined with such high temperatures and low pressures, the crustal-like Nd-Hf isotopic compositions (epsilon(Nd)(t)= -5.3 to -4.4, epsilon(Hf)(t) = -7.0 to -3.8.) support their derivation from the shallow melting of Archean crustal rocks under high heat flow. However, the contrasted K2O and Na2O compositions between the alkali-feldspar granite (K2O = 4.76-5.14 wt%, Na2O = 4.76-5.14 wt.%) and the albite granite (K2O = 0.29-0.44 wt.%, Na2O = 6.15-6.56 wt.%) imply that they may have been derived from distinct source rocks or have undergone different magmatic processes. Genetic modeling suggests that the alkali-feldspar granite was originated from melting of granodioritic rocks. The albite granite, however, was most likely derived from the reworking of plagioclase-rich layers after the extraction of A-type melts. Coupled with other studies on sedimentary and volcanic successions in the Jiao-Liao-Ji Belt, the unusual association of the A-type alkali-feldspar granite and albite granite indicates that the southern segment of the Jiao-Liao-Ji Belt experienced continental rifting during 2.1-2.2 Ga. (C) 2015 Elsevier B.V. All rights reserved.
WOS关键词	A-TYPE GRANITES ; ZIRCON U-PB ; LA-ICP-MS ; IONIZATION MASS-SPECTROMETRY ; PRESSURE PELITIC GRANULITES ; HF ISOTOPIC EVIDENCE ; KHETRI COPPER BELT ; LACHLAN FOLD BELT ; IN-SITU ANALYSIS ; TECTONIC IMPLICATIONS
WOS研究方向	Geology
语种	英语
WOS记录号	WOS:000358702800006
资助机构	Natural Science Foundation of China(41202065) ; Natural Science Foundation of China(41202065) ; Major State Basic Research Development Program(2012CB416605) ; Major State Basic Research Development Program(2012CB416605) ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Natural Science Foundation of China(41202065) ; Natural Science Foundation of China(41202065) ; Major State Basic Research Development Program(2012CB416605) ; Major State Basic Research Development Program(2012CB416605) ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/62298]
专题	地质与地球物理研究所_中国科学院矿产资源研究重点实验室
作者单位	1.Chinese Acad Sci, Inst Geochem, State Key Lab Ore Deposit Geochem, Guiyang 550081, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 3.Tianjin North China Geol Explorat Gen Inst, Tianjin 300170, Peoples R China
推荐引用方式 GB/T 7714	Lan, Ting-Guang,Fan, Hong-Rui,Yang, Kui-Feng,et al. Geochronology, mineralogy and geochemistry of alkali-feldspar granite and albite granite association from the Changyi area of Jiao-Liao-Ji Belt: Implications for Paleoproterozoic rifting of eastern North China Craton[J]. PRECAMBRIAN RESEARCH,2015,266:86-107.
APA	Lan, Ting-Guang,Fan, Hong-Rui,Yang, Kui-Feng,Cai, Ya-Chun,Wen, Bo-Jie,&Zhang, Wen.(2015).Geochronology, mineralogy and geochemistry of alkali-feldspar granite and albite granite association from the Changyi area of Jiao-Liao-Ji Belt: Implications for Paleoproterozoic rifting of eastern North China Craton.PRECAMBRIAN RESEARCH,266,86-107.
MLA	Lan, Ting-Guang,et al."Geochronology, mineralogy and geochemistry of alkali-feldspar granite and albite granite association from the Changyi area of Jiao-Liao-Ji Belt: Implications for Paleoproterozoic rifting of eastern North China Craton".PRECAMBRIAN RESEARCH 266(2015):86-107.