PETROGRAPHY AND IDENTIFICATION OF THE ATYPICAL OPHITIC DIABASES IN EASTERN CENTRAL ASIAN OROGENIC BELT

ZHONG Hui; LIU Xin; WU Yue; YANG Ya-jun

2019 Vol. 28, No. 2

Article Contents

Article navigation > Geology and Resources > 2019 > 28(2): 128-133, 148

Next Article Previous Article

ZHONG Hui, LIU Xin, WU Yue, YANG Ya-jun. PETROGRAPHY AND IDENTIFICATION OF THE ATYPICAL OPHITIC DIABASES IN EASTERN CENTRAL ASIAN OROGENIC BELT[J]. Geology and Resources, 2019, 28(2): 128-133, 148.

Citation:

ZHONG Hui, LIU Xin, WU Yue, YANG Ya-jun. PETROGRAPHY AND IDENTIFICATION OF THE ATYPICAL OPHITIC DIABASES IN EASTERN CENTRAL ASIAN OROGENIC BELT[J]. Geology and Resources, 2019, 28(2): 128-133, 148.

PETROGRAPHY AND IDENTIFICATION OF THE ATYPICAL OPHITIC DIABASES IN EASTERN CENTRAL ASIAN OROGENIC BELT

Shenyang Center of Geological Survey, CGS, Shenyang 110034, China

Received Date: 06 August 2018

Revised Date: 08 October 2018

Publish Date: 30 April 2019

Abstract

Abstract

Hornblende metamorphic diabase is found in the eastern tectonic zone of Central Asian Orogenic Belt. Its petrographical features present atypical ophitic texture, as blastodiabasic texture and blastophitic poikilitic texture, with major minerals of plagioclase and hornblende and minor clinopyroxene and actinolite. The whole rock petrochemical analysis results show that the chemical compositions in the samples include SiO₂ (49.15%-52.96%), Na₂O+K₂O (2.71%-5.07%), CaO (7.07%-10.40%), Al₂O₃ (14.77%-17.31%), TFeO (8.80%-12.27%), and MgO (6.45%-9.57%). The data fall into the basalt area in the volcanic rock TAS classification diagram, belonging to basic rock, which confirms the naming of the hornblende metamorphic diabase with atypical ophitic texture. The hornblende metamorphic diabase underwent retrometamorphism with the basic plagioclase (labradorite) turned to intermediate plagioclase (andesine) and further to albite or sodium oligoclase, while the clinopyroxene is metamorphosed to hornblende, and then to actinolite.
- eastern Central Asian Orogenic Belt /
- atypical ophitic texture /
- metamorphic diabase /
- petrography /
- petrochemistry

FullText(HTML)

References

[1]	李锦轶, 高立明, 孙桂华, 等.内蒙古东部双井子中三叠世同碰撞壳源花岗岩的确定及其对西伯利亚与中朝古板块碰撞时限的约束[J].岩石学报, 2007, 23(3):565-582. Google Scholar
[2]	李锦轶, 曲军峰, 张进, 等.中国北方造山区显生宙地质历史重建与成矿地质背景研究进展[J].地质通报, 2013, 32(2/3):207-219. Google Scholar
[3]	潘桂棠, 肖庆辉, 陆松年, 等.中国大地构造单元划分[J].中国地质, 2009, 36(1):1-28. Google Scholar
[4]	刘训, 李廷栋, 耿树芳, 等.中国大地构造区划及若干问题[J].地质通报, 2012, 31(7):1024-1034. Google Scholar
[5]	孙德有, 吴福元, 李惠民, 等.小兴安岭西北部造山后A型花岗岩的时代及与索伦山-贺根山-扎赉特碰撞拼合带东延的关系[J].科学通报, 2000, 45(20):2217-2222. Google Scholar
[6]	付俊彧, 汪岩, 那福超, 等.内蒙古哈达阳镁铁-超镁铁质岩锆石U-Pb年代学及地球化学特征:对嫩江-黑河地区晚泥盆世俯冲背景的制约[J].中国地质, 2015, 42(6):1740-1753. Google Scholar
[7]	白文吉, 杨经绥, 胡旭峰, 等.内蒙古贺根山蛇绿岩岩石成因和地壳增生的地球化学制约[J].岩石学报, 1995, 11(Sl):112-124. Google Scholar
[8]	包志伟, 陈森煌, 张桢堂.内蒙古贺根山地区蛇绿岩稀土元素和Sm-Nd同位素研究[J].地球化学, 1994, 23(4):339-349. Google Scholar
[9]	赵春荆, 彭玉鲸, 党增欣, 等.吉黑东部构造格架及地壳演化[M].沈阳:辽宁大学出版社, 1996:2-36. Google Scholar
[10]	孙德有, 吴福元, 高山, 等.吉林中部晚三叠世和早侏罗世两期铝质A型花岗岩的厘定及对吉黑东部构造格局的制约[J].地学前缘, 2005, 12(2):263-275. Google Scholar
[11]	常丽华, 陈曼云, 金巍, 等.透明矿物薄片鉴定[M].北京:地质出版社, 2006:92-96、150-161. Google Scholar
[12]	卢良兆, 许文良.岩石学[M].北京:科学出版社, 2011:54-62. Google Scholar
[13]	徐夕生, 邱检生.火成岩岩石学[M].北京:地质出版社, 2011:170-172. Google Scholar
[14]	常丽华, 曹林, 高福红.火成岩鉴定手册[M].北京:地质出版社, 2009:32-36. Google Scholar
[15]	陈曼云, 金巍, 郑常青.变质岩鉴定手册[M].北京:地质出版社, 2009:83-105. Google Scholar