Petrogenesis of the Seleteguole granitoids from Jinhe county in Xinjiang (West China): Implications for the tectonic transformation of Northwest Tianshan
Petrogenesis of the Seleteguole granitoids from Jinhe county in Xinjiang (West China): Implications for the tectonic transformation of Northwest Tianshan
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新疆金河县色勒特古勒花岗岩岩石成因：对西北天山构造改造的启示
DOI：
10.1016/j.lithos.2016.04.002
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发表时间：
2016-07
期刊：
影响因子：
3.5
通讯作者：
Jing-Liang Cao
中科院分区：
文献类型：
--
作者：
Wen-Chao Su;Hong-Feng Tang;Jia-Hui Yan;Jing-Liang Cao
新疆精河县色勒特郭勒铜钼存款矿床位于西北天山北方边缘。已识别出黑云母花岗岩、闪长斑岩和石英闪长斑岩三大类侵入体。黑云母花岗岩侵入于中石炭统东图津组碳酸盐岩和碎屑岩中，锆石U-Pb年龄为307 ± 3 Ma。较年轻的二长闪长斑岩和石英二长闪长斑岩局部侵入黑云母花岗岩，锆石U-Pb年龄为302 ± 3 Ma，与二长闪长斑岩接触的花岗岩具千枚蚀变特征。矿物学和地球化学特征表明，色勒特郭勒花岗岩类均为钙碱性I型。这些花岗岩类相对于HFSE富集大离子亲石元素，具有Nb、P、Ti的负异常，是典型的弧相关岩石。3种花岗岩类均具有正εHf（t）值、低Mg#（34-39）、低Cr（< 60 ppm）和Ni（< 15 ppm）的特征，表明其母岩浆可能来自年轻的下地壳，而年轻的下地壳可能是古准噶尔洋俯冲到伊犁地块之下导致幔源岩浆冷却的结果。俯冲沉积物参与了色勒特郭勒花岗岩类的物源。与黑云母花岗岩相比，二长闪长斑岩和石英二长闪长斑岩具有较高的Th/La比值，但较低的锆石εHf（t）值，表明后两者中俯冲沉积物的贡献更大。西北天山晚石炭世岩浆岩的区域地质和地球化学特征表明，晚石炭世I型花岗岩类具有较年轻的Sr-Nd-（Hf）同位素特征，形成于古准噶尔洋向伊犁陆块俯冲的陆缘弧环境。结合区内早二叠世花岗岩类的成分，提出西北天山的构造背景在石炭纪-二叠纪界线（约1000年）由大陆弧向陆内伸展转变。300Ma）。
The Seleteguole Cu–Mo deposit in Jinghe County, Xinjiang is tectonically located on the northern margin of the Northwestern Tianshan. Three major intrusions including biotite granite, diorite porphyry and quartz diorite porphyry have been identified. The biotite granite, with a zircon U–Pb age of 307 ± 3 Ma, intruded carbonates and clastic rocks of the Middle Carboniferous Dongtujin Formation. The younger diorite porphyry and quartz diorite porphyry, with an identical zircon U–Pb age of 302 ± 3 Ma, locally intruded the biotite granite; where the granite in contact with the two porphyries were characterized by phyllic alteration. The mineralogical and geochemical characteristics indicate that all granitoids in Seleteguole belong to calc-alkaline I-type. These granitoids are enriched in LILE relative to HFSE with negative anomalies of Nb, P and Ti, typical of arc-related rocks. All three granitoids have positive zircon εHf(t) values, low Mg#ratios (34–39), and low Cr (< 60 ppm) and Ni (< 15 ppm) contents, suggesting that their parental magmas could be derived from juvenile lower crust that has probably originated from cooling of mantle-derived magmas as a result of the subduction of Paleo-Junggar Ocean beneath the Yili Block. Subducted sediments were involved in the source of the granitoids in Seleteguole. Compared to biotite granite, diorite porphyry and quartz diorite porphyry have higher Th/La ratios but lower zircon εHf(t) values, indicating that more subducted sediments contributed in the latter two. The regional geological and geochemical characteristics of the Late Carboniferous igneous rocks in the Northwestern Tianshan show that Late Carboniferous I-type granitoids, with juvenile Sr–Nd–(Hf) isotopic signatures, formed in a continent-marginal arc setting as a result of the subduction of Paleo-Junggar Ocean beneath the Yili Block. In combination with the compositions of the Early Permian granitoids in the region, we suggest that the tectonic setting of the Northwestern Tianshan transformed from a continental arc to an intracontinental extension setting at the Carboniferous–Permian boundary (ca. 300 Ma).
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影响因子：
1.5
作者：
Bo Wang;M. Faure;Dominique Cluzel;L. Shu;J. Charvet;S. Meffre;Q. Ma
通讯作者：
Bo Wang;M. Faure;Dominique Cluzel;L. Shu;J. Charvet;S. Meffre;Q. Ma
DOI：
10.1080/00206819909465164
发表时间：
1999-08
期刊：
--
影响因子：
--
作者：
B. Burchfiel;E. Brown;Qidong Deng;Xianyue Feng;Li Jun;P. Molnar;Jianbang Shi;Zhangming Wu
通讯作者：
B. Burchfiel;E. Brown;Qidong Deng;Xianyue Feng;Li Jun;P. Molnar;Jianbang Shi;Zhangming Wu
影响因子：
1.9
作者：
B. Jahn;Fu-Yuan Wu;D. Hong
通讯作者：
B. Jahn;Fu-Yuan Wu;D. Hong
影响因子：
12.1
作者：
M. Lustrino
通讯作者：
M. Lustrino
影响因子：
5.3
作者：
D. Ionov;A. Hofmann
通讯作者：
D. Ionov;A. Hofmann