[1]张荣臻,张德会,杜保峰.2018.西昆仑托日提乌托克铜(金)矿点地球化学、年代学特征及地质意义.大地构造与成矿学,优先出版:001-15.doi:10.16539/j.ddgzyckx.2020.04.021
 ZHANG Rongzhen,ZHANG Dehui,DU Baofeng.2018.Geochronology and Geochemistry of the Tuoritiwutuoke Copper (gold) Ore Spots in Western Kunlun and Their Geological Significance.Geotectonica et Metallogenia,优先出版:001-15.doi:10.16539/j.ddgzyckx.2020.04.021
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西昆仑托日提乌托克铜(金)矿点地球化学、年代学特征及地质意义
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《大地构造与成矿学》[ISSN:ISSN 1001-1552/CN:CN 44-1595/P]

卷:
期数:
2018年优先出版
页码:
001-15
栏目:
出版日期:
2020-12-30

文章信息/Info

Title:
Geochronology and Geochemistry of the Tuoritiwutuoke Copper (gold) Ore Spots in Western Kunlun and Their Geological Significance
作者:
张荣臻123 张德会1 杜保峰23 胡红雷2 朱红运2 韩 亚4 宾朝晖4
1.中国地质大学(北京) 地球科学与资源学院, 北京 100083; 2.河南省地质调查院, 河南 郑州 450001; 3.河南省金属矿产成矿地质过程与资源利用重点实验室, 河南 郑州 450001; 4.河南省地质科学研究所, 河南 郑州 450001
Author(s):
ZHANG Rongzhen123 ZHANG Dehui1 DU Baofeng23 HU Honglei2 ZHU Hongyun2 HAN Ya4 and BIN Chaohui4
1. China University of Geosciences (Beijing), Beijing 100083, China; 2. Henan Institute of Geological Survey, Zhengzhou 450001, Henan, China; 3. Henan Key Laboratory for Metal Mineral Ore-forming Geological Process and Utilization of Resource, Zhengzhou 450001, Henan, China; 4. Henan Geological Science Research Institute, Zhengzhou 450001, Henan, China
关键词:
西昆仑 托日提乌托克 铜(金)矿点 I型花岗岩 岛弧环境
Keywords:
West Kunlun Tuoritwutuoke copper(gold) ore spots I-type granite island-arc setting
分类号:
P597 P595
DOI:
10.16539/j.ddgzyckx.2020.04.021
文献标志码:
A
摘要:
托日提乌托克铜(金)矿点是新疆西昆仑地区新发现的达到铜工业品位的矿点, 铜(金)矿化仅与斑状石英二长岩体有关, 其形成时代、成因类型及地质背景尚不明确。为了确定矿点及含矿岩体的成因与形成的构造背景, 并评价其找矿潜力, 进行了岩石地球化学和锆石U-Pb年代学等方面的研究。结果表明, 该铜(金)矿点为一受构造控制的岩浆热液型矿点。斑状石英二长岩整体具有富硅(SiO2=54.43%~69.61%)、富铝(Al2O3=14.38%~16.75%)、富碱(Na2O+K2O=8.44%~ 8.82%)等特征, 富集大离子亲石元素, 亏损高场强元素, 属于偏铝质的高钾钙碱性I型花岗岩类, 轻重稀土分馏明显, 具有Eu的弱负异常, 为典型的岛弧岩浆岩, 是新生地壳部分熔融和壳源沉积物混染的结果; 锆石U-Pb同位素测年获得成岩年龄为483.4±3.7 Ma, 表明该岩体形成于早奥陶世, 与大同地区加里东期的岩浆活动事件一致, 为原特提斯洋向南北昆仑地体俯冲环境下的产物; 岩石地化特征及已有探矿工程表明该矿点元素异常明显、见矿良好且剥蚀程度不高, 具有较好的找矿潜力。
Abstract:
The Tuoritiwutuoke copper(gold) ore spots is a new discovered ore site with copper industrial grade in Western Kunlun area. The mineralization is only associated with porphyritic quartz monolith, while the chronology, genetic type and geological background are unclear . In order to ensure the genesis and tectonic background of the ore-bearing pluton, and to evaluate the ore-finding potential, Petrogeochemistry and zircon U-Pb Chronology of the pluton were studied. Results showed that the ore spots is a magmatic hydrothermal deposit controlled by structure, the porphyritic quartz monolith was characterized by high content of SiO2 (54.43% to 69.61%), Al2O3 (14.38% to 16.75%) and Na2O+K2O (8.44% to 8.82%), and was enriched in LILE, depleted of HFSE, it belongs to I-type granite with high potassium and calcalkaline aluminum, with obvious fractionation between light and heavy rare earth element , and has weak negative Eu anomalies. It’s typical Island arc magmatic rock, which comes from the partial melting of juvenile crust material and contaminated by crust-derived sediments. The zircon U-Pb dating shows that the pluton was formed at 483.4±3.7 Ma, which indicates the pluton formed in the early Ordovician and was nearly consistent with the magmatic activity occurred in Datong area during the Caledonian period, it is the product of the subduction stage of the Paleotethys to the north and south Kunlun terrane. Geochemical characteristics of the pluton and prospecting projects indicate that the ore site has obvious anomaly, well ore-findings and low degree of denudation , and the ore-prospecting potential is quite promising.

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备注/Memo

备注/Memo:
收稿日期: 2020-07-01; 改回日期: 2020-08-27
项目资助: 中央返还新疆地质勘查基金(编号: K15-1-LQ01)、国家自然科学基金(41373048、41773030)。
第一作者简介: 张荣臻(1987-), 男, 博士, 工程师, 主要从事矿床学与地球化学研究。Email: zrzyang@126.com
通信作者: 张德会(1955-), 男, 教授, 博士生导师, 主要从事地球化学研究。Email: zhdehui@cugb.edu.cn
更新日期/Last Update: 2020-09-17