摘要
甲生盘铅锌硫矿床位于华北陆块北缘西段狼山—渣尔泰山成矿带,赋存于中元古代渣尔泰山群地层中,具有明显的层控特征并受同生断裂影响,区内矿石层纹状、角砾状和浸染状构造发育。矿石硫化物硫同位素测试分析表明：早期沉积硫化物3δ4S值变化范围在17.0‰～31.5‰之间,均值为23.9‰;后期穿插脉状硫化物3δ4S值变化范围在13.1‰～31.1‰之间,均值为24.1‰;二者δ^34S值相近,均属海水硫酸盐来源,后期热液改造作用微弱,火山活动对该矿区成矿作用直接贡献不明显;围岩3δ4S值变化范围在7.7‰～15.1‰之间,均值为10.2‰,明显小于矿石硫化物的3δ4S值,亦属海相沉积范畴;矿体北翼发育海西期花岗岩,但其对矿体的改造作用有限。
The Jiashengpan lead-zinc-sulfur deposit,located in Langshan-Zhaertaishan mineralization belt in the western part of northern margin of North China Platform,rich in Mesoproterozoic Zhaertaishan Group,is obviously stratabound and controlled by synchronous fault.The ore bodies are mainly composed of layered,conglomeratic and disseminated ores.The sulfur isotopic compositions of the sulfides from ores show that the values of δ34S from the early depositional ores ranging from 17.0‰ to 31.5‰ with an average of 23.9‰ are similar to the values of δ^34S from the late reticulated ores ranging from 13.1‰ to 31.1‰ with an average of 24.1‰,indicating the same origin from sea sulphate.The late hydrothermal event is weak and the volcanic activities have little effect on the mineralization.The values of δ^34S from the host rocks ranging from 7.7‰ to 15.1‰ with an average of 10.2‰,are smaller than those of the ores obviously and belong to the marine deposition.The Varisian granite to the north of the ore bodies has limited effect on the ore bodies.
出处
《现代地质》
CAS
CSCD
北大核心
2010年第1期34-41,共8页
Geoscience
基金
国家重点基础研究发展计划项目(2006CB403503)
国家自然科学基金面上项目(40602010)
高等学校学科创新引智计划项目(B07011)
中国地质大学(北京)地质过程与矿产资源国家重点实验室开放基金项目(GPMR0737)
关键词
硫同位素
SEDEX型矿床
甲生盘铅锌硫矿
内蒙古
sulfur isotope SEDEX-typed deposit Jiashengpan lead-zinc-sulfur deposit Inner Mongolia
作者简介
付超，男，硕士研究生，1986年出生，矿产普查与勘探专业，主要从事固体矿产资源勘查与评价方面的研究工作。Email：fuchaocugb@163．com。
王建平，男，副教授，1972年出生，矿物学、岩石学、矿床学专业，主要从事矿床学成因与找矿规律的研究与教学工作。Email：jpwang@cugb．edu．cn。
