Global Geology 2014, 27(2) 76-92 DOI:     ISSN: 1673-9736 CN: 22-1371/P

Current Issue | Archive | Search                                                            [Print]   [Close]
Information and Service
This Article
Supporting info
PDF(790KB)
[HTML]
Reference
Service and feedback
Email this article to a colleague
Add to Bookshelf
Add to Citation Manager
Cite This Article
Email Alert
Keywords
 North China Craton
Longgang Block
amphibolite
Paleoproterozoic metamorphism
Authors
LI Meihui
ZHENG Changqing and LIANG Chenyue
PubMed
Article by Li M
Article by Zheng CALC

 Metamorphic P-T conditions and zircon U-Pb ages of amphibolite in Laojinchang area, southern Jilin Province

 LI Meihui 1 , ZHENG Changqing 1,2* and LIANG Chenyue 1,2 

 1. College of Earth Sciences, Jilin University, Changchun 130061, China; 

2. Key Laboratory of Mineral Resources Evaluation of Northeast Asia, Ministry of Natural Resources, Changchun 130061, China 

Abstract

 The Longgang Block is one of the most important parts of the eastern North China Craton, characterized by extensive Late Neoarchean (~2.5 Ga) granulite facies metamorphism. However, it remains uncertain whether it was inffuenced by Paleoproterozoic magmatism-metamorphism. The authors provide a comprehensive analysis of amphibolite in Laojinchang area, southern Jilin Province, through petrographic, geochemical, mineralogical, and zircon dating. The main ffndings are as follows: The mineral assemblage of amphibolite is Hb+Pl+Cpx+Bi+Kf+Q, characteristic of amphibolite facies; zircon U-Pb dating indicates that the metamorphic age of amphibolite is 1 834±33 Ma; the amphibolite has geochemical characteristics of calcium alkaline, with depletion of Nb, Ta, Ti and P. The plagioclase in the amphibolite is oligoclase, belonging to acidic plagioclase. It is speculated that the protolith of the amphibolite is diorite; using geothermobarometer, the peak metamorphic P-T conditions of amphibolite are determined to be 536–593 ℃/ 3.4–5.0 kbar, and the post-peak conditions are 429–566 ℃/1.3–3.1 kbar. The above results indicate that the Paleoproterozoic metamorphism has been superimposed on Longgang Block, linked to a new orogenic event on the northern edge of North China Craton. 

Keywords  North China Craton   Longgang Block   amphibolite   Paleoproterozoic metamorphism  
Received  Revised  Online:  
DOI:
Fund
Corresponding Authors:
Email:
About author:

References:
Similar articles
1.DU Meng,MAO Weijian,YANG Maoxin and ZHAO Jianzhi . Migration images guided high-resolution velocity modeling based on fully convolutional neural network [J]. Global Geology, 2024,27(3): 145-153
2.WEI Laonao, LIU Yunhe* and ZHANG Bo . UAV-based transient electromagnetic 3D forward modeling and inversion and analysis of exploration capability [J]. Global Geology, 2024,27(3): 154-166
3.Kovalenko S. V. 1,Kezina T. V. 2*,Kryuchko E. I. 1 and Mironov M. A. 1 . Preliminary results of lithological and palynological study of Svobodny, ancient man’s parking relic in Amur region, Russia [J]. Global Geology, 2024,27(3): 121-131
4.ZHANG Xinrong,WANG Jiayu,PING Shuaifei and LI Yaran . Changes of grain size from peat proffle in eastern mountainous area over past 2000 years, Jilin Province, Northeast China [J]. Global Geology, 2024,27(3): 132-144
5. CHEN Xuanning, HAN Fuxing, GAO Zhenghui *,SUN Zhangqing and HAN Jiangtao . Horizontal-to-vertical spectral ratio inversion method based on multimodal forest optimization algorithm[J]. Global Geology, 2024,27(3): 167-176
6.WANG Weihua and WANG Tingting . Acoustic emission signal identi?cation of di?erent rocks based on SE-1DCNN-BLSTM network model [J]. Global Geology, 2024,27(1): 43-55
7.ZHENG Chao,WANG Yanlong,ZHANG Baohui and DU Lizhi . Application of transient Rayleigh wave in detection of tunnel lining void area [J]. Global Geology, 2024,27(1): 56-62
8.ZHAO Junfeng,LI Weimin,LIU Tongjun and GAO Jinhui . Genesis and tectonic setting of Early Jurassic granitic rocks in Huashan Town, Xingcheng, western Liaoning[J]. Global Geology, 2024,27(1): 1-19
9.WU Haoran,YANG Hao,GE Wenchun,JI Zheng,DONG Yu,JING Yan and JING Jiahao . Spatial-temporal distribution and geochemistry of highly evolved Mesozoic granites in Great Xing’an Range, NE China: Discriminant criteria and geological signi?cance[J]. Global Geology, 2024,27(1): 20-34
10.JIA Zhenyang,LI Gang and FENG Fan . Numerical simulation of formation mechanism of unloading joints in granitic pluton[J]. Global Geology, 2024,27(1): 35-42
11.MUHAMMAD Hassan, WU Wenhao and YANG Jinyue. Exploring the first occurrence of Scincomorpha lizard from Nenjiang Formation (lower Campanian) of Jilin, Northeast China: a follow-up study[J]. Global Geology, 2023,26(4): 199-210
12.DONG Min, LIANG Minliang, DONG Hui, FENG Xingqiang, ZHANG Linyan and WANG Zongxiu. Geochemical characteristics of temperature and pressure of Paleozoic reservoir fluid inclusions in Xuanjing region, Lower Yangtze area[J]. Global Geology, 2023,26(4): 222-236
13.HAN Junwei,SHAN Xuanlong,YIMING Ablimiti,BIAN Baoli,LIU Hailei,LI Ang and YI Jian. Characteristics and identification of weathering crust of Pennsylvanian volcanic rocks in Shixi area, Junggar Basin[J]. Global Geology, 2023,26(4): 211-221
14.WANG Hongxiang,DU Lizhi1 and SUN Zhen. Optimization design of conical reaction teeth of shear wave vibroseis vibration plate[J]. Global Geology, 2023,26(4): 264-272
15.WANG Ruiqi, LI Hong and SHANG Yi. Change of cultivated land area and effect on ecosystem service in black soil region in Northeast China: a case study of Lishu County, Jilin Province[J]. Global Geology, 2023,26(4): 251-263

Copyright by Global Geology