| 福建漳平可坑矿区煤系石墨赋存规律研究 |
| |
| 引用本文： | 丁正云,曹代勇,王路,彭扬文,李阳,陈泉霖,邓瑞锦,林晓炎.福建漳平可坑矿区煤系石墨赋存规律研究[J].地质力学学报,2019,25(2):198-205. |
| |
| 作者姓名： | 丁正云 曹代勇 王路 彭扬文 李阳 陈泉霖 邓瑞锦 林晓炎 |
| |
| 作者单位： | 中国矿业大学 (北京) 地球科学与测绘工程学院,北京,100083;福建省煤田地质勘查院,福建 福州,350005 |
| |
| 基金项目： | 国家自然基金（41772156）；福建省国土资源厅科技项目（2017001） |
| |
| 摘 要： | 漳平可坑矿区地处福建省中部含煤条带，赋存有丰富的高变质无烟煤，有较好的煤系石墨资源前景，是福建重要的石墨成矿区。为了查明可坑矿区煤系石墨的赋存规律，利用X射线衍射、拉曼光谱等技术，结合矿区岩浆活动和构造运动，对煤成石墨结构演化特征、煤成石墨化作用机制和控制因素进行了研究。结果表明煤系石墨是岩浆热和构造应力共同作用的产物，在煤成石墨化过程中，岩浆热产生的高温促进芳香层相互连接和横向增长，构造应力有利于芳香层的择优定向和有序堆叠，煤成石墨结构在温度、应力等因素作用下，碳层间结构缺陷逐渐消亡，石墨晶格逐渐形成，微观相逐渐转变，最终形成比较完善的石墨结构。研究明确了矿区构造和岩浆岩侵入对煤成石墨化作用的影响，划分了构造动力—岩浆热变质带、岩浆热—构造变质带、构造动力变质带三个变质带和三级控矿断裂带。可坑矿区煤系石墨产于构造动力—岩浆热变质带中，矿层靠近岩体呈近东西走向的单斜层状、似层状展布，但矿床的展布不完全受制于岩体，在空间上也受三级控矿断裂带的控制。
|
| 关 键 词： | 煤系石墨 构造 岩浆活动 赋存规律 |
| 收稿时间： | 2018/10/30 0:00:00 |
| 修稿时间： | 2019/1/10 0:00:00 |
STUDY ON OCCURRENCE REGULARITY OF COAL-BASED GRAPHITE IN KEKENG MINING AREA IN ZHANGPING, FUJIAN PROVINCE |
| |
| DING Zhengyun,CAO Daiyong,WANG Lu,PENG Yangwen,LI Yang,CHEN Quanlin,DENG Ruijin and LIN Xiaoyan.STUDY ON OCCURRENCE REGULARITY OF COAL-BASED GRAPHITE IN KEKENG MINING AREA IN ZHANGPING, FUJIAN PROVINCE[J].Journal of Geomechanics,2019,25(2):198-205. |
| |
| Authors: | DING Zhengyun CAO Daiyong WANG Lu PENG Yangwen LI Yang CHEN Quanlin DENG Ruijin and LIN Xiaoyan |
| |
| Institution: | 1.College of Geoscience and Surveying Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China2.Fujian Provincial Coalfield Geological Exploration Institute, Fuzhou 350005, Fujian, China |
| |
| Abstract: | Zhangping Kekeng mining area is located in the coal-bearing belt in the central part of Fujian Province. It contains abundant high-metamorphic anthracite and has good prospects for coal-based graphite resources. It is an important graphite metallogenic area in Fujian Province. In order to find out the occurrence regularity of coal-bearing graphite in Kekeng mining area, the structural evolution characteristics of coal-forming graphite, the mechanism of coal-forming graphitization and the controlling factors were studied by X-ray diffraction, Raman spectrum, combined with magmatic activities and tectonic movements in the mining area. The results show that coal-based graphite is the product of magmatic heat and tectonic stress. In the process of coal-forming graphitization, the high temperature generated by magmatic heat promotes the interconnection and lateral growth of aromatic layers, and tectonic stress is beneficial to the preferential orientation and orderly stacking of aromatic layers. Under the influence of temperature, stress and other factors, the defects of carbon interlayer structure disappear gradually, graphite lattice forms and micro-phase changes; eventually a relatively perfect graphite structure is formed. The influence of tectonics and magmatic intrusion on coal-forming graphitization is clarified. Three-grade ore-controlling fault zones and three metamorphic belts are classified, which are tectonic dynamics-magmatic thermal metamorphic belt, magmatic thermal-tectonic metamorphic belt and tectonic dynamic metamorphic belt. The coal-based graphite in the Kekeng mining area is produced in tectonic dynamics-magmatic thermal metamorphic belt, and the ore-bearing layer is close to the rock mass with a monoclinic layered and layer-like distribution with approximately E-W strike; however, the distribution of ore deposits is not only controlled by rock mass but also controlled by three-grade ore-controlling faults in space. |
| |
| Keywords: | coal-based graphite structure magmatic activity occurrence regularity |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《地质力学学报》浏览原始摘要信息 |
| 点击此处可从《地质力学学报》下载免费的PDF全文 |
|
