| 东昆仑成矿带岩浆铜镍硫化物矿床成矿地质条件与成矿规律 |
| |
| 引用本文： | 李良,孙丰月,李世金,李碧乐,钱烨,王超,赵拓飞,禹禄,王冠,霍亮,王力,张雅静,王琳琳,李浩然,闫佳铭,李予晋,张得鑫,杨延乾,王维.东昆仑成矿带岩浆铜镍硫化物矿床成矿地质条件与成矿规律[J].吉林大学学报(地球科学版),2022,52(5):1461-1496. |
| |
| 作者姓名： | 李良 孙丰月 李世金 李碧乐 钱烨 王超 赵拓飞 禹禄 王冠 霍亮 王力 张雅静 王琳琳 李浩然 闫佳铭 李予晋 张得鑫 杨延乾 王维 |
| |
| 作者单位： | 1.云南大学地球科学学院，昆明6505042.吉林大学地球科学学院，长春1300213.青海省地质调查局，西宁8100014.自然资源部高原荒漠区战略性矿产勘查开发技术创新中心，西宁8100015.中国自然资源经济研究院，北京1011496.黑龙江科技大学矿业工程学院，哈尔滨150022 |
| |
| 摘 要： | 东昆仑成矿带是我国重要的Au-Cu-Co-Ni-Fe-Pb-Zn及其他多金属成矿带，2011年夏日哈木超大型镍矿床的发现使东昆仑一跃成为我国重要的铜镍资源基地。经过多年的勘查，东昆仑成矿带Cu-Ni找矿取得了较大突破，陆续发现了一批具有较大找矿潜力的岩体，如石头坑德、阿克楚克塞、浪木日和尕牙河等岩体。笔者依据近些年研究的成果对东昆仑成矿带岩浆铜镍矿床的成矿规律和成矿特征作初步总结，并指出下一步找矿方向。形成的主要认识如下：东昆仑造山带至少发生了4期强度不等的Cu-Ni-Co-(PGE)成矿事件，分别为寒武纪—奥陶纪（535~445 Ma）、志留纪—泥盆纪（440~394 Ma）、二叠纪—早三叠世（271~239 Ma）与晚三叠世（233~208 Ma），其中志留纪—泥盆纪的岩体数量最多、矿化率最高，产出的矿床数量多、规模也最大，而其他期次岩体的数量少、规模小与矿化弱；与其他成矿期的岩体零星分布于整个东昆仑成矿带不同，志留纪—泥盆纪岩体严格产在昆中断裂以北，又以昆中带数量最多，丛聚性明显；成矿具有显著的专属性，成矿岩体均以杂岩体产出，岩相发育齐全，富含贵橄榄石和斜方辉石的超镁铁质岩是最重要的含矿岩石，多属于铁质超基性岩；原始岩浆起源于软流圈地幔的大比例部分熔融，地壳物质混染是硫化物饱和的关键因素；志留纪—泥盆纪岩体找矿潜力最大，主要分布在昆中带，是今后找矿勘查的主攻方向和区域，其他期次找矿潜力较小，但仍需进一步评价寒武纪—奥陶纪岩体的Cu-PGE含矿性。
|
| 关 键 词： | 夏日哈木铜镍矿床 岩浆铜镍硫化物矿床 志留纪—泥盆纪岩体 成矿规律 找矿方向 东昆仑成矿带 |
| 收稿时间： | 2022-02-25 |
Metallogenic Geological
Conditions and Regularity of Magmatic Cu-Ni Sulfide Deposits in the East Kunlun
Metallogenic Belt |
| |
| Li Liang,Sun Fengyue,Li Shijin,Li Bile,Qian Ye,Wang Chao,Zhao Tuofei,Yu Lu,Wang Guan,Huo Lian,Wang Li,Zhang Yajing,Wang Linlin,Li Haoran,Yan Jiaming,Li Yujin,Zhang Dexin,Yang Yanqian,Wang Wei.Metallogenic Geological
Conditions and Regularity of Magmatic Cu-Ni Sulfide Deposits in the East Kunlun
Metallogenic Belt[J].Journal of Jilin Unviersity:Earth Science Edition,2022,52(5):1461-1496. |
| |
| Authors: | Li Liang Sun Fengyue Li Shijin Li Bile Qian Ye Wang Chao Zhao Tuofei Yu Lu Wang Guan Huo Lian Wang Li Zhang Yajing Wang Linlin Li Haoran Yan Jiaming Li Yujin Zhang Dexin Yang Yanqian Wang Wei |
| |
| Abstract: | The
East Kunlun Metallogenic Belt (EKMB) is an important Au-Cu-Co-Ni-Fe-Pb-Zn and
other polymetallic metallogenic belts in China. The discovery of the Xiarihamu
super-large Ni deposit in the summer of 2011 made East Kunlun become an
important Cu-Ni resource base in China. After years of exploration, great
breakthroughs have been made in the prospecting of Cu-Ni deposits in the EKMB,
and a number of mafic-ultramafic complexes with great prospecting potential
have been discovered successively, such as Shitoukengde, Akechukesai, Langmuri
and Gayahe intrusions. Based on the researches in recent years, the
metallogenic regularity and characteristics of the magmatic Cu-Ni sulfide
deposits in the EKMB are preliminarily summarized, and the prospecting target
for the next step is pointed out. Main understandings are as follows: At least
four stages of Cu-Ni-Co-(PGE) metallogenesis with different intensities
occurred in the EKMB, i.e., Cambrian-Ordovician (535-445 Ma), Silurian-Devonian (440-394 Ma), Permian-Early Triassic (271-239 Ma) and
Late Triassic (233-208 Ma), among which the Silurian-Devonian has the largest
number of intrusions and the highest mineralization rate, and produces the
largest number and scale of ore deposits, while other stages have less number
of intrusions, smaller scale and weaker mineralization. Different from other
ore-forming plutons scattered throughout the EKMB, the Silurian-Devonian
intrusions are strictly distributed in the north of the Central Kunlun fault,
and most of them occur in the Central Kunlun belt with significant clustering.
They have significant metallogenic specialization with the most important
ore-bearing rocks belonging to ultramafic rocks enriching in chrysolite and
orthopyroxene. The primary magma is derived from the large proportion of
partial melting of the asthenospheric mantle, and crustal contamination is one
of the most important key factors of sulfide saturation. The Silurian-Devonian
intrusions have the greatest prospecting potential, mainly distributed in the
Central Kunlun belt, which is the main prospecting target and area for future
prospecting and exploration. The intrusions of other stages have less
prospecting potential, but the Cu-(PGE) ore-bearing of Cambrian-Ordovician
intrusions still need to be further evaluated. |
| |
| Keywords: | Xiarihamu Cu-Ni deposit magmatic Cu-Ni sulfide deposit Silurian-Devonian intrusions metallogenic regularity prospecting target East Kunlun metallogenic belt |
|
| 点击此处可从《吉林大学学报(地球科学版)》浏览原始摘要信息 |
| 点击此处可从《吉林大学学报(地球科学版)》下载免费的PDF全文 |
|
