| 江绍断裂带晚侏罗世S型酸性火山岩特征及其地质意义 |
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| 引用本文： | 廖群安,李昌年,王京名. 江绍断裂带晚侏罗世S型酸性火山岩特征及其地质意义[J]. 地球科学, 1999, 24(1): 63-68 |
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| 作者姓名： | 廖群安 李昌年 王京名 |
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| 作者单位： | 中国地质大学地球科学学院 |
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| 基金项目： | 国土资源部地勘专项基金;; |
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| 摘 要： | 岩石化学、地球化学特征研究结果表明,江绍断裂带赣东北段广丰—上饶地区的晚侏罗世酸性火山岩是中地壳变质沉积源岩改造成因的Ｓ型火山岩．通过横向对比发现,该区火山岩与前人已认识的、江绍断裂带西延部分的相山、东乡Ｓ型酸性火山岩盆地构成了一条沿江绍断裂带展布的Ｓ型酸性火山岩带,这一特殊成因的火山岩及其空间分布规律,很可能是晚侏罗世华夏与扬子两板块陆内碰撞俯冲的结果．
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| 关 键 词： | 晚侏罗世 S型火山岩 陆内俯冲 江绍断裂 |
CHARACTERISTICS AND GEOLOGICAL SIGNIFICANCE OF S_TYPE ACID VOLCANIC ROCKS IN LATE JURASSIC ALONG JIANGSHAO RIFT ZONE |
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| Liao Qun''an,Li Changnian,Wang Jingming. CHARACTERISTICS AND GEOLOGICAL SIGNIFICANCE OF S_TYPE ACID VOLCANIC ROCKS IN LATE JURASSIC ALONG JIANGSHAO RIFT ZONE[J]. Earth Science-Journal of China University of Geosciences, 1999, 24(1): 63-68 |
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| Authors: | Liao Qun''an Li Changnian Wang Jingming |
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| Abstract: | The investigation into the petrochemistry and geochemistry shows that the Late Jurassic acid volcanic rocks in the Guangfeng_Shangrao district of the Northeast Jiangxi segment along the Jiangshao rift zone are considered as S_type volcanic rocks derived from the metamorphosed sedimentary source rocks at the intermediate crust. The horizontal comparison reveals that the volcanic rock in this region, together with the S_type acid volcanic rock basin in the Xiangshan and Dongxiang located in the western extension part of the known Jiangshao rift zone, forms an S_type acid volcanic rock zone distributed along the Jiangshao rift zone. This rock of a special origin and its spatial distribution pattern may have been a product of the intracontinental collision and subduction between the Late Jurassic Cathaysian and Yangtze plates. |
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| Keywords: | Late Jurassic S_type volcanic rock intracontinental subduction Jiangshao rift zone. |
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