| 吉辽边界梅河口-开原地段晚海西-早印支期岩浆旋回及构造意义 |
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| 引用本文： | 赵娟,彭玉鲸,丁明广,刘大业,张宁,杨传.吉辽边界梅河口-开原地段晚海西-早印支期岩浆旋回及构造意义[J].地质与资源,2012,21(4):371-375. |
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| 作者姓名： | 赵娟 彭玉鲸 丁明广 刘大业 张宁 杨传 |
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| 作者单位： | 1. 吉林省区域地质矿产调查所, 吉林 长春 130033;2. 吉林大学 地球科学学院, 吉林 长春 130061 |
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| 摘 要： | 本区已获晚海西-早印支期花岗岩类6件锆石高精度测年数据和两件继承锆石年龄，确定了其活动时限305~242 Ma，主体分属早中三叠世岩石序列、晚二叠世岩石序列、中二叠世岩石序列相应的岩石单元.小四平岩体的年龄及其被晚三叠世地层不整合覆盖，指明古亚洲洋构造域完成在242~228 Ma间.基于上述岩石年龄及形成构造环境和邻近地区磨拉石相发育的层位，揭示古吉黑造山带晚海西-早印支期构造运动或构造-岩浆旋回具有多幕式的递进演化模式，并受显生宙泛大陆旋回所制约.
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| 关 键 词： | 梅河口-开原 晚海西-早印支期 岩浆旋回 构造意义 吉林-辽宁 |
| 收稿时间： | 2011-10-24 |
LATE HERCYNIAN-EARLY INDOSINIAN MAGMATIC CYCLES IN MEIHEKOU-KAIYUAN BETWEEN JILIN AND LIAONING PROVINCES: Tectonic Implication |
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| ZHAO Juan
,
PENG Yu-jing
,
DING Ming-guang
,
LIU Da-ye
,
ZHANG Ning
,
YANG Chuan.LATE HERCYNIAN-EARLY INDOSINIAN MAGMATIC CYCLES IN MEIHEKOU-KAIYUAN BETWEEN JILIN AND LIAONING PROVINCES: Tectonic Implication[J].Geology and Resources,2012,21(4):371-375. |
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| Authors: | ZHAO Juan PENG Yu-jing DING Ming-guang LIU Da-ye ZHANG Ning YANG Chuan |
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| Institution: | 1. Jilin Institute of Regional Geological Survey, Changchun 130022, China;2. College of Earth Sciences, Jilin University, Changchun 130061, China |
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| Abstract: | Six high precision zircon dating data and two inherited zircon ages for the Late Hercynian-Early Indosinian granitoid in this area are obtained.Its formation ages are confirmed as 305-242 Ma,which can be assigned into the Early-Middle Triassic rock unit,Late Permian rock unit and Middle Permian rock unit,respectively.The age of Xiaosiping pluton and the fact that this pluton is covered unconformably by the Late Triassic strata indicate that the Paleo-Asian oceanic tectonic domain was completed between 242 and 228 Ma.Based on the above rock ages,as well as its tectonic settings and the occurrence of the adjacent molasse facies layer,it is revealed that the Late Hercynian-Early Indosinian tectonic movement or tectonomagmatic cycle of the Paleo-Jihei orogenic belt experienced a multi-episode progressive evolution,and was constrained by the Phanerozoic Pangea cycle. |
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| Keywords: | Meihekou-Kaiyuan Late Hercynian-Early Indosinian magmatic cycle tectonic implication Jilin-Liaoning |
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