A Paleoproterozoic orogeny recorded in a long-lived cratonic remnant (Wuyishan terrane), eastern Cathaysia Block, China
A Paleoproterozoic orogeny recorded in a long-lived cratonic remnant (Wuyishan terrane), eastern Cathaysia Block, China
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中国华夏地块东部长寿克拉通遗迹（武夷山地体）记录的古元古代造山运动
DOI：
10.1016/j.precamres.2009.08.009
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发表时间：
2009-11
影响因子：
3.8
通讯作者：
Zhang, Ming
中科院分区：
文献类型：
--
作者：
Yu, Jin-Hai;Griffin, W. L.;Shu, Liangshu;Li, Chunzhong;O'Reilly, S. Y.;Wang, Lijuan;Zhang, Ming
武夷山北部（浙江南部，华夏地块东部）前寒武纪基底主要由八都杂岩和古元古代花岗岩组成，是华夏地块发现的最古老的岩石。天侯、丹珠、下集和李庄岩体中1块片麻岩和5块片麻岩花岗岩的LA-ICPMS锆石U-Pb年龄表明，该岩体在1888 ~ 1855Ma之间发生了岩浆作用和变质作用。夏集（1888±7Ma）和李庄（1875±9Ma）花岗岩SiO2、K2O和Rb含量高，A/CNK（1.09 ~ 1.40）和Rb/Sr含量高，Sr、REE和镁质组分（Mg、Fe、Ti、Mn等过渡金属）含量低。它们具有s型花岗岩的地球化学特征，具有丰富的继承锆石，具有一定的年龄和hf同位素组成，证实其为沉积原岩。天侯和丹珠花岗岩为弱过铝质花岗岩（A/CNK=0.80 ~ 1.07）， sio2含量低，Ga/Al和FeO/(FeO+MgO)比值高，Zn和HFSE含量为典型的A型花岗岩。结晶温度高（885 ~ 920℃），与a型花岗岩一致。高的Y/Nb比值（>1.4）表明它们属于a2亚群，表明它们可能形成于造山后构造环境。它们的年龄在1867 ~ 1855Ma之间，略晚于同碰撞的李庄、下集s型花岗岩。这些花岗质岩石与八渡杂岩的变质岩构成了该区晚古元古代造山旋回。所有的1.86-1.90Ga锆石，无论是来自S型还是a型花岗岩，都显示出相似的Hf同位素组成，Hf模式年龄聚集在~ 2.8Ga。这些模式年龄以及在部分岩石中发现的继承锆石（约2.5 ~ 2.7 ga）表明，华夏地块东部晚古元古代岩浆作用和构造作用是对太古宙基底的叠加。武夷山地体的古元古代造山运动与哥伦比亚超大陆的组合相吻合，表明武夷山地体是该超大陆的一部分。锆石年龄还记录了武夷山北部地区早中生代（三叠纪）构造热覆印非常强烈，导致古元古代基底变质程度高，古元古代锆石Pb流失，新锆石过度生长。武夷山中南部和陈才地区（浙江北部）在新元古代和早古生代也经历了强烈的改造。武夷山地体（特别是在北部）代表了古老克拉通的一个长期存在的遗迹，它已经存在了至少10亿年。武夷山地体的基底岩石组成、古元古代造山作用和三叠纪构造热印记与韩国岭南地块相似，表明武夷山地体可能在古元古代至三叠纪之间存在联系。
The Precambrian basement of northern Wuyishan (southern Zhejiang Province, eastern Cathaysia Block, South China), consists mainly of Paleoproterozoic granites and metamorphic rocks of the Badu Complex, which are the oldest rocks found in the Cathaysia Block. LA-ICPMS zircon U–Pb ages for a gneiss and five gneissic granites from the Tianhou, Danzhu, Xiaji and Lizhuang plutons indicate that magmatism and metamorphism took place between 1888 and 1855Ma. The Xiaji (1888±7Ma) and Lizhuang (1875±9Ma) granites have high SiO2, K2O and Rb contents, high A/CNK (1.09–1.40) and Rb/Sr, and low contents of Sr, REE and mafic components (Mg, Fe, Ti, Mn and other transition metals). They have the geochemical signature of S-type granites, and a sedimentary protolith is confirmed by the presence of abundant inherited zircons with a range of ages and Hf-isotope compositions. The Tianhou and Danzhu granites are metaluminous to weakly peraluminous (A/CNK=0.80–1.07), and have low SiO2contents, high Ga/Al and FeO/(FeO+MgO) ratios, and Zn and HFSE concentrations typical of A-type granites. They also record high crystallization temperatures (885–920°C), consistent with A-type granites. High Y/Nb ratios (>1.4) indicate that they belong to the A2subgroup, suggesting that they probably formed in a post-orogenic tectonic setting. Their ages range from 1867 to 1855Ma, slightly later than the syn-collisional Lizhuang and Xiaji S-type granites. These granitic rocks and the metamorphic rocks of the Badu Complex define a late Paleoproterozoic orogenic cycle in the area. All the 1.86–1.90Ga zircons, whether derived from S- or A-type granites, show similar Hf-isotopic compositions, with Hf model ages clustering at ∼2.8Ga. These model ages, and inherited zircons (ca. 2.5–2.7Ga) found in some rocks, indicate that the late Paleoproterozoic magmatism and tectonism of the eastern Cathaysia Block represent an overprint on an Archaean basement. This Paleoproterozoic orogeny in the Wuyishan terrane coincides with the assembly of the supercontinent Columbia, suggesting that the Wuyishan terrane was the part of this supercontinent. Zircon ages also record an early Mesozoic (Triassic) tectonothermal overprint that was very intensive in the northern Wuyishan area, leading to high-grade metamorphism of Paleoproterozoic basement, Pb loss from Paleoproterozoic zircons and overgrowth of new zircon. The central and southern parts of Wuyishan and the Chencai area (northern Zhejiang Province) also experienced strong reworking in Neoproterozoic and early Paleozoic times. The Wuyishan terrane (especially in the north) represents a long-lived remnant of the old craton, which has survived for at least one billion years. The compositions of the basement rocks, the Paleoproterozoic orogeny and the Triassic tectonothermal imprint in the Wuyishan terrane are similar to those recognized in the Yeongnam massif of South Korea, suggesting that the two terranes may have been connected from Paleoproterozoic to Triassic time.
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影响因子：
3.9
作者：
C. Cheong;G. Jeong;H. Kim;Man-Sik Choi;S. Lee;M. Cho
通讯作者：
C. Cheong;G. Jeong;H. Kim;Man-Sik Choi;S. Lee;M. Cho
影响因子：
3.8
作者：
Xiaoping Lu;Fu-Yuan Wu;Jing-hui Guo;S. Wilde;Jin-Hui Yang;Xiaoming Liu;Xiao Zhang
通讯作者：
Xiaoping Lu;Fu-Yuan Wu;Jing-hui Guo;S. Wilde;Jin-Hui Yang;Xiaoming Liu;Xiao Zhang
DOI：
10.1086/317951
发表时间：
2000-11
期刊：
The Journal of Geology
影响因子：
--
作者：
Seung Ryeol Lee;M. Cho;K. Yi;R. Stern
通讯作者：
Seung Ryeol Lee;M. Cho;K. Yi;R. Stern
影响因子：
5.8
作者：
R. Larson
通讯作者：
R. Larson
DOI：
10.1360/03yd0042
发表时间：
2005-02
期刊：
Science in China Series D: Earth Sciences
影响因子：
--
作者：
T. Sun;Xinmin Zhou;Peirong Chen;Huimin Li;Hong-ying Zhou;Zhicheng Wang;W. Shen
通讯作者：
T. Sun;Xinmin Zhou;Peirong Chen;Huimin Li;Hong-ying Zhou;Zhicheng Wang;W. Shen