|
|
|
| Chemical composition of the chromite and diamond potentiality of Bailushan rock mass in Suining area of Xuzhou |
| ZHOU Qizhong, ZHANG Qi, FENG Xuezhi, WANG Bo, QIU Lei, WANG Guoqiang |
| NO.5 Geological Team of Jiangsu Geology and Mineral Bureau, Xuzhou 221004, China |
|
|
|
|
Abstract Bailushan rock mass is an important diamond-bearing rock mass in Northern Jiangsu Province. On the basis of the chemical composition of the chromite in Bailushan rock mass, the authors discussed its genesis and significance of the diamond potentiality and analyzed the diamond mineralization potential of Bailushan rock mass. The chromite in Bailushan rock mass has characteristics of high Cr, low Al and high Mg, which belongs to the magnochromite. It was crystallized from the peridotite that originated from the deep mantle, not a crystalline product of the rock mass, which is most likely derived from a deep-source trap in the rock mass. The crystallization temperature is 1 253~1 354 ℃, which is consistent with the formation temperature of the diamond (1 150~1 400 ℃), indicating a close relationship between them. The chemical composition of the chromite from Bailushan rock mass is very similar to that from the ore-bearing kimberlites in Shandong and Liaoning. Most chromites belong to S4 and S6, and a few chromites belong to S1 and S2. S1 and S2 chromites are the marked minerals of diamond-bearing rock mass. Bailushan rock mass has good diamond potential and prospecting prospects.
|
|
Received: 12 March 2020
|
|
|
|
|
|
[1] 周琦忠,施建斌,黄友波,等.江苏徐州西村金伯利岩管地质特征及其找矿意义[J].地质通报,2019,38(1):152-162.
[2] 黄友波,周琦忠,张琪,等.江苏徐州塔山橄榄玄武玢岩地球化学特征及其与金刚石成因关系[J].地质通报,2019,38(1):132-142.
[3] 张安棣. 金刚石找矿指示矿物研究及数据库[M].北京:北京科学技术出版社,1991:1-162.
[4] 董振信. 金伯利岩中铬尖晶石的特征及与其它岩类中铬尖晶石之对比[J].地质论评,1991,37(6):508-517.
[5] 杨献忠,蔡逸涛,康丛轩,等.湖南桃源理公港地区含金刚石沉凝灰岩的发现及其找矿意义[J].中国地质调查,2019,6(6):56-62.
[6] 周琦忠,张琪,宗德林,等.徐州贾汪地区暗色岩锆石U-Pb年龄及金刚石成因探讨[J].华东地质,2018,39(3):202-211.
[7] 李胜荣. 结晶学与矿物学[M].北京:地质出版社,2008:147-196.
[8] 索科洛夫. 乌拉尔铬铁矿[M].朱福湘,李秉伦,袁启林,等译.北京:地质出版社,1958.
[9] Roder P L,Schulze D J.Crystallization of groundmass spinel in kimberlite[J].J Petrol,2008,49(8):1473-1495.
[10] 居易,朱仁智,倪培,等.瓦房店30号岩管金伯利岩中尖晶石成分特征及其意义[J].矿物岩石地球化学通报,2016,35(6):1217-1225.
[11] 邓小芹,黄远成,丘志力,等.黔东南苍蒲塘钾镁煌斑岩含铬尖晶石地球化学特征及其对金刚石含矿性的指示[J].大地构造与成矿学,2019,43(5):1023-1035.
[12] Rao N V C,Lehmann B,Mainkar D,et al.Diamond-facies chrome spinel from the Tokapal kimberlite,Indrāvati basin,central India and its petrological significance[J].Mineral Petrol,2012,105(3/4):121-133.
[13] 蔡逸涛,陈国光,张洁,等.安徽栏杆地区橄榄辉长岩地球化学特征及其与金刚石成矿的关系[J].资源调查与环境,2014,35(4):245-253.
[14] 贾晓丹. 辽宁瓦房店金伯利岩中铬尖晶石的矿物学特征及其指示意义[D].北京:中国地质大学(北京),2014.
[15] 杨志军,黄珊珊,陈耀明,等.山东蒙阴金伯利岩中尖晶石族矿物特征及其地质意义[J].矿物岩石地球化学通报,2018,37(2):168-179.
[16] Fabriès J.Spinel-olivine geothermometry in peridotites from ultramafic complexes[J].Contrib Mineral Petrol,1979,69(4):329-336.
[17] 潘雪峰. 阿拉善地块南缘北大山地区特拜基性-超基性岩体岩石成因及构造意义[D].西安:长安大学,2019. |
| [1] |
LIU Liguang, WU Datian. Geological characteristics and prospecting predictions of No.50 kimberlite pipe in Wafangdian diamond deposit of Liaoning Province[J]. , 2020, 7(5): 33-41. |
| [2] |
YANG Xianzhong, CAI Yitao, KANG Congxuan, HUANG Guangzhao, LI Shuai, XIANG Hua. Discovery of diamond-bearing sedimentary tuff and its prospecting significance in Ligonggang area of Taoyuan County, Hunan Province[J]. , 2019, 6(6): 56-62. |
|
|
|
|
2020, Vol. 7 
