四川石棉地区碲成矿地质背景、地球化学特征及其地质意义  

Geological background of tellurium mineralization, geochemistry and its geological significance in Shimian region, Sichuan

作　　者：张筌豇 何明友[1] 刘应平[2,3] 白俊 许伟 Zhang Quanjiang;He Mingyou;Liu Yingping;Bai Jun;Xu Wei(College of Earth Sciences,Chengdu University of Technology,Chengdu610059;Sichuan Geological Survey,Chengdu610081;Key Laboratory of the Evaluation and Utilization of Strategic Rare Metals and Rare Earth Resources of Sichuan Province,Chengdu610081)

机构地区：[1]成都理工大学地球科学学院,成都610059 [2]四川省地质调查院,成都610081 [3]稀有稀土战略资源评价与利用重点实验室,成都610081

出　　处：《地质科学》2020年第1期270-289,共20页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：基金资助:中国科学院地球化学研究所开放实验室项目(编号:03JY029-027-1)和中国地质调查局地质调查项目(编号:12120113051400)资助。

摘　　要：大水沟蹄矿床作为世界唯一蹄独立成矿矿床,从它的偶然发现至今,一直倍受关注,但一直缺乏相关的探寻与对类似蹄矿床的地球化学理论方法研究。石棉地区主要富集与基性岩浆活动有关的亲基性场元素或氧化物,Te、Bi成矿元素的整体含量不高,发生不同程度的贫化,晞在二叠系、志留系通化岩组、奥陶系大河边组、震旦系及二叠一三叠纪侵入岩中具有较好的局部富集和成矿潜力。虽然蹄矿区内各元素含量水平不高,但Te、Bi平均含量高于石棉地区平均含量,接近西南五省背景值。根据确成矿地质背景、石棉地区与确矿区的地球化学特征,建立蹄矿的地球化学找矿模型,运用模型为石棉地区提供了最具潜力的晞找矿靶区与方向,部分靶区已发现蹄矿脉或矿化。Dashuigou tellurium deposit is the only known independent Te ore deposit in the world.Since accidental discovery,it has attracted much attention and research from scholars.However,there has been a lack of relevant geochemical theories and methods for exploring Te deposits similar to Dashuigou tellurium deposit.The basic field elements or oxides related to basic magmatic activity are enriched,and the overall content of Te and Bi is not high,resulting in different degrees of depletion in Shimian region.There has a good concentration and metallogenic potential of Te in Permian,Silurian Tonghua Formation,Ordovician Dahebian formation,Sinian and Permian-Triassic intrusive rocks.The content of elements in stream sediments is not high in Dashuigou Te deposit area,the average content of Te and Bi is higher than that of Shimian region,but close to the background value of five provinces in Southwest China.There has a certain metallogenic potential for Te.On the basis of the geological background of Te mineralization and the geochemical characteristics in Shimian region and Dashuigou Te deposit area,a geochemical model for Te deposits is established.Six most potential prospecting targets were identified for Te minerals by this model.Already,Te veins or mineralization have been found in some of these areas.

关 键 词：晞成矿地质背景 地球化学特征 地球化学模型 水系沉积物 找矿预测 

分 类 号：P595[天文地球—地球化学] P596[天文地球—地质学]