This paper reports the layered mafic volcanic rocks formed in the Hongliuquan area of the North Altyn region at 843 Ma. This suite of volcanic rocks has relatively high TiO2 (1.18%–2.06%), low Zr/Hf (23.28–29.28) and low Nb/Ta (4.20–12.99), showing the trace element characteristics of E-MORB/OIB, like the typical low-Ti basalts in large igneous provinces. The analysis results of major and trace elements in the entire rock show that the magma of the basic rock has undergone a low degree of partial melting (<10%) of the asthenosphere source of garnet (<2%), and has been subject to varying degrees of crustal mixing during the uplift process. The occurrence, geochemical characteristics, age data and high mantle potential temperature (T_p=1479°C) of the northern Aljin layered basic volcanic rock indicate that this basic volcanic rock is a continental overflow basalt (CFB) originated from the Neoproterozoic mantle plume. Combined with the extended background magmatic activity developed in the region during the same period (850–750 Ma), we believe that the northern Alkinic volcanic rocks record the earliest magmatic activity during the supercontinent rifting process. In the Neoproterozoic era, it was discovered that the magmatic activities of Alkin and those of the Qilian, Chaibei Margin, Eastern Kunlun, South China and Qinling Mountains all had the diagenological characteristics of an intracontinental rift valley environment, which indicates that they are related to the mantle plume activities at 850–800 Ma. It further indicates that the formation of the Northern Altyn volcanic rock mass is closely related to the beginning of the rifting of the Rodinia supercontinent at approximately 850 Ma. 

报道北阿尔金地区红柳泉一带形成于843 Ma的层状基性火山岩。该套火成岩具有较高的TiO₂含量(1.18%~2.06%)以及较低的Zr/Hf值(23.28~29.28)和Nb/Ta值(4.20~12.99), 表现出E-MORB/OIB的微量元素特征, 与大火成岩省内典型低Ti玄武岩特征类似。全岩主量元素和微量元素分析结果表明, 基性岩岩浆经历贫石榴石(<2%)的软流圈地幔源低程度(<10%)部分熔融作用, 在上升过程中受到不同程度的地壳混染。北阿尔金层状基性火山岩的产状、地球化学特征、年龄数据和高地幔潜在温度(T_p=1479°C)表明, 该基性火山岩是起源于新元古代地幔柱的大陆溢流玄武岩(CFB)。结合区域同期(850~750 Ma)发展的伸展背景岩浆作用, 认为北阿尔金基性火山岩记录了超大陆裂解过程中最早期岩浆作用。在新元古代, 发现阿尔金岩浆活动与祁连、柴北缘、东昆仑、华南和秦岭的岩浆活动均具有板内裂谷环境的成岩特征, 表明与850~800 Ma的地幔柱活动有关, 进一步说明北阿尔金基性火山岩体的形成与约850 Ma罗迪尼亚超大陆的开始裂解密切相关。