侯广顺, 魏世鹏, 袁稳,等.河南省鹤壁地区地幔捕掳体中尖晶石的矿物化学特征及其地质意义[J].河南理工大学学报（自然科学版）,2020,39(3):26-34.

HOU G S, WEI S P, YUAN W,et al.Mineral chemical characteristics and geological significance of spinel frommantle xenoliths in Hebi region， Henan province[J].Journal of Henan Polytechnic University(Natural Science) ,2020,39(3):26-34.

河南省鹤壁地区地幔捕掳体中尖晶石的矿物化学特征及其地质意义

侯广顺1,2, 魏世鹏1, 袁稳1,2, 张艳林1, 齐永安1, 向世红2, 李英杰3

1.河南理工大学资源环境学院，河南焦作 454000;2.河南省有色金属地质勘查总院，河南郑州 450052;3.河南理工大学化学化工学 院，河南焦作 454000

摘要:河南省鹤壁地区位于华北克拉通东部破坏区与西部相对稳定区的过渡带上，出露有大量的地幔捕掳体，是研究华北克拉通的一个地幔窗口。本文分析了鹤壁地区土门金伯利岩和新生代上峪橄辉玲岩所携带的地幔捕掳体中尖晶石的矿物化学特征，并探讨该地区的岩石圈地幔性质。土门金伯利岩所携带的地幔捕掳体中的尖晶石Mg ^#介于21.58 ~ 78. 66 ， Cr ^#介于 18.08~73. 97 ；上峪橄辉玲岩所携带的地幔捕掳体中尖晶石Mg ^#介于48.96 ~ 77. 00 ， Cr ^#介于 18. 78 ~ 64.10。山东蒙阴地区的地幔包体代表华北古生代古老难熔型地幔，昌乐-山旺和河北汉诺坝等新生代地幔代表华北中新生代新生饱满型地幔。与山东蒙阴、昌乐-山旺、河北汉诺坝等地区地幔尖晶石的对比表明，土门和上峪的尖晶石相地幔介于难熔型地幔和饱满型地幔之间，以过渡型岩石圈地幔为主。尖晶石-橄榄石矿物温度压力计算表明，土门和上峪的捕掳 温度主要集中在1 031 ~ 1 090 ℃，压力集中在1.70 ~1. 88 GPa，处于明显偏高的地幔热流状态，可能与华北克拉通的破坏有关。

关键词:鹤壁地区;地幔捕掳体;岩石圈地幔;尖晶石;过渡型地幔;矿物化学特征

doi:10.16186/j.cnki.1673-9787.2020.3.4

基金项目:国家自然科学基金资助项目（41773024，21507145 ）；河南省科技公关项目（172102210331 ）；河南省博士后基金资助项目

收稿日期:2019/08/15

修回日期:2019/10/29

出版日期:2020/05/15

Mineral chemical characteristics and geological significance of spinel frommantle xenoliths in Hebi region， Henan province

HOU Guangshun1,2, WEI Shipeng1, YUAN Wen1,2, ZHANG Yanlin1, QI Yongan1, XIANG Shihong2, LI Yingjie3

1.Institute of Resources & Environment， Henan Polytechnic University， ^Laozuo  454000 ， Henan， China;2.Henan General Institute of Non-ferrous Metals Geological Exploration， Zhengzhou  450052 ， Henan， China;3.College of Chemistry and Chemical Engineering， Henan Polytechnic University， Jiaozuo  454000 ， Henan， China

Abstract:Hebi region， Henan province is located in the transition belt between the destroyed part of the eastern and the relative stable part of the western of North China Craton （ NCC ） . There are a large number of mantle xenoliths exposed， which is a mantle window for the study of the NCC. The mineral chemical characteristics of spinels in mantle xenoliths carried by Tumen kimberlite and Cenozoic Shangyu olivine-pyroxene porphytite in Hebi region were analyzed and the character of lithosphere mantle in this area was discussed. The Mg^# and Cr^# of spinels in mantle xenoliths from Tumen kimberlite were between 21.58 ~78.66 and 18.08 ~73.97 respectively. The Mg^# and Cr^# of spinels in mantle xenoliths from Cenozoic Shangyu olivine-pyroxene porphytite were 48.96 ~77.00 and 18. 78 ~64. 10 respectively. Mantle xenoliths in Mengyin area of Shandong province represented the paleozoic refractory mantle of NCC， while the mantle xenoliths in Changle-Shanwang and Han- nuoba in Hebei province represented the Meso Cenozoic and Cenozoic plump mantle. By comparison with spinels in mantle xenoliths from Mengyin region， Changle-Shanwang region， Shandong province and Hannuoba region ，Hebei， the spinel phase mantle of Tumen and Shangyu was between the refractory mantle and the plump mantle ， and the transitional lithospheric mantle was the main one. The calculation of spinel olivine mineral temperature manometer showed that the temperature of the xenoliths in Tumen and Shangyu were mainly concentrated in 1 031 ~1 090 ℃ ， and the pressure was concentrated in 1.70 ~1.88 GPa， which was in a obviously high mantle heat flow state， and that might be related to the destruction of NCC.

Key words:Hebi region;mantle xenoliths;lithosphere mantle;spinel;transitional mantle;mineral chemical

河南省鹤壁地区地幔捕掳体中尖晶石的矿物化学特征及其地质意义_侯广顺.pdf