|
|
|
| Discovery of diamond-bearing sedimentary tuff and its prospecting significance in Ligonggang area of Taoyuan County, Hunan Province |
| YANG Xianzhong1, CAI Yitao1, KANG Congxuan1, HUANG Guangzhao1, LI Shuai2, XIANG Hua2 |
1. Nanjing Geological Survey Center, China Geological Survey, Nanjing 210016, China;
2. Team 413, Bureau of Geology and Mineral Exploration and Development of Hunan Province, Changde 415000, China |
|
|
|
|
Abstract Diamonds have been picked out from the gray-green and purple-red sedimentary interlayer of the Cretaceous sedimentary red basin in Ligonggang area of Taoyuan County, Hunan Province. Taking the gray-green rock as the research object, the authors determined the rock name and the property of garnet and mica in rock through thin section identification and electron probe analysis. Under the microscope, the gray-green rock has a tuffaceous structure, and it is composed of 45% crystal fragments, 35% rock cuttings and 20% vitric fragments, which is the typical sedimentary tuff rather than the kimberlite identified by predecessors. The garnet and mica in sedimentary tuff are respectively G10 pyrope and phlogopite. The chemical composition characteristics of G10 pyrope and phlogopite are similar to the diamond-bearing kimberlite of typical rock tubes from Liaoning, Shandong and South Africa, which indicates that pyrope and phlogopite are from the diamond-bearing kimberlite. The characteristics of the sedimentary tuff indicate that the tuffaceous substance source is not too far, which lays a foundation for finding volcanic edifice in the neighborhood. The discovery of kimberly rock cuttings, G10 pyrope and phlogopite provides valuable information for searching the primary kimberlite in the surrounding areas.
|
|
Received: 15 March 2019
|
|
|
|
|
|
[1] 宋瑞祥. 中国金刚石矿床专论:中国金刚石矿找矿与开发[M].北京:地质出版社,2013.
[2] 李四光. 鄂西川東湘西桂北第四紀冰川現象述要[J].地质论评,1940,5(3):171-184.
[3] 胡伯素. 湖南沅水一带之金刚石[J].地质论评,1940,5(5):385-391.
[4] 喻德渊. 湘西黔东金矿概论[J].地质论评,1944,9(增刊1):75-84.
[5] 喻德渊. 国立中央研究院地质研究所集刊:湘西黔东金矿地质[M].北京:地质研究所,1949.
[6] 张培元. 对湖南寻找金刚石原生矿的建议[J].中国地质,1998(9):17-19.
[7] 李荣清. 湖南金刚石原生矿找矿研究的现状与展望[J].矿床地质,1996,15(增刊1):17-18.
[8] 地质矿产部宜昌地质研究所,湖南省地质矿产局413队.湘西地区原生金刚石找矿方向和革代区优选[R].1997.常德:湖南省地质矿产勘查开发局413队.
[9] 饶家荣. 湖南原生金刚石矿深部构造地质背景及成矿预测[J].湖南地质,1999,18(1):21-28.
[10] 斯戴芬·迈尔.谈湖南金刚石勘查找矿[J].湖南地质,1999(增刊1):144.
[11] 董斌,陈明珊,肖湘辉.湖南原生金刚石成矿地质背景及找矿方向[J].矿床地质,2006,25(增刊1):337-340.
[12] 张令明,王三丁,肖湘辉,等.湖南原生金刚石矿形成条件探讨[J].国土资源导刊,2007,4(3):27-30.
[13] 董斌. 湖南金刚石原生矿找矿工作与方向的再思考[J].国土资源情报,2009(7):49-52.
[14] 董和金. 对扬子地台原生金刚石找矿的五点建议[J].国土资源导刊,2012,9(1):83-84.
[15] 杨献忠,蔡逸涛,康丛轩,等.再议湖南地区原生金刚石的找矿方向[J].华东地质,2017,38(增刊1):87-89.
[16] 向华,肖书阅,曾文辉,等.湖南省沅水流域金刚石原生矿成矿地质条件及找矿思路[C]//中国地质调查局南京地质调查中心(华北和扬子地区金刚石矿产调查项目组).全国金刚石找矿思路与找矿方向研讨会交流材料汇编. 2018:98-104.
[17] 肖书阅,董斌,李子云,等.坚持问题导向,探讨湖南金刚石找矿中有关问题[C]//中国地质调查局南京地质调查中心(华北和扬子地区金刚石矿产调查项目组).全国金刚石找矿思路与找矿方向研讨会交流材料汇编. 2018:105-111.
[18] 李子云,马文运.宁乡县云影窝含金刚石钾镁煌斑岩地质特征[J].湖南地质,1993,12(4):221-225.
[19] 林玮鹏,丘志力,李子云,等.湖南宁乡V号岩管煌斑岩的岩石地球化学特征[J].资源调查与环境,2009,30(3):180-187.
[20] 王道经,黄怀勇.建议在湖南寻找与陨击作用有关的金刚石[J].中国地质,1998(6):46-47.
[21] 沈瑞锦,刘德镒.原生金刚石的可能新源岩[J].湖南地质,1999,18(2/3):193-194,209.
[22] 徐俊. 湖南省桃源县茨树垭金刚石原生矿勘查(阶段性)地质报告[R].长沙:湖南省地质资料馆,2016.
[23] 徐俊. 原生金刚石矿的成矿机制和勘查[C]//中国地质调查局南京地质调查中心(华北和扬子地区金刚石矿产调查项目组).全国金刚石找矿思路与找矿方向研讨会交流材料汇编. 2018:19-23.
[24] 常丽华,曹林,高福红.火成岩鉴定手册[M].北京:地质出版社,2009.
[25] 张儒瑗,杨美娥.石榴石的计算方法——《金伯利岩及有关岩类中的石榴石》一文的补遗[J].地质科学,1979,14(1):98-99.
[26] 赵杏媛,张有瑜.粘土矿物与粘土矿物分析[M].北京:海洋出版社,1990.
[27] Dawson J B,Stephens W E.Statistical classification of garnets from kimberlite and associated xenoliths[J].J Geol,1975,83(5):589-607.
[28] Sobolev N V.Deep-seated inclusions in kimberlites and the problem of the composition of the upper mantle[J].Amer Geophys Union,1977,11:257-259.
[29] 黄蕴慧,秦淑英,周秀仲,等.华北地台金伯利岩与金刚石[M].北京:地质出版社,1992.
[30] 湖南省地质矿产局四一三队.湖南省石门―桃源地区原生金刚石矿普查地质报告[R].常德:湖南省地质矿产局四一三队,1995.
[31] 周登诗. 钻石之路[M].北京:地质出版社,2015.
[32] 龙昭陵. 重力均衡异常与湖南原生金刚石矿床预测[J].湖南地质,1998,17(3):192-196. |
| [1] |
YANG Xianzhong, YUAN Xueyin, WANG Jun, CAI Yitao, KANG Congxuan. Review of mineralogy, inclusion and carbon stable isotopic studies of diamond[J]. , 2019, 6(6): 12-18. |
| [2] |
WANG Denghong, ZHENG Mianping, WANG Chenghui, GAO Shuxue, SHANG Pengqiang, YANG Xianzhong, FAN Xingtao, SUN Yan. Progresses and main achievements on bulk lacking minerals and strategic emerging industry minerals survey project[J]. , 2019, 6(6): 1-11. |
| [3] |
ZHAO Lei, FU Qing, MA Li, ZHU Jia-chuan, WEI Qiang, LIU Zhan-mei, ZHANG Zhi-ying , CAI Li-xuan, WANG Qi, LI Chao. Discovery of Chamatun Iron Deposit and Its Prospecting Significance[J]. , 2015, 2(5): 32-37. |
|
|
|
|
2019, Vol. 6 
