近日，印度比尔巴尔·萨尼古生物学研究所Ranveer Singh Negi团队研究了特提斯喜马拉雅带提东谷（金纳尔）寒武纪碎屑沉积物的地球化学特征：沿印度板块北缘追踪大陆岛弧岩浆活动。相关论文于2025年7月17日发表在《地球化学学报》杂志上。

特提斯喜马拉雅寒武纪盆地位于印度板块北缘。据研究组所知，首次对Kinnaur Tidong Valley的昆赞拉组（寒武系2 - 4期）碎屑沉积物进行了地球化学研究。根据砂岩岩石学和模态分析，稀土元素和微量元素分析表明，其物源以长英质（UCC）为主，并有一些基本的（贫氢铝）输入，表明其来源于活跃的边缘大陆岛弧背景下的大陆熔融体，与再造造山带有关。

寒武纪盆地随后被晚寒武世—早奥陶世的库尔吉赫造山运动所湮没，并伴有广泛的酸性岩浆作用和变质作用。Ce/Ce*、Eu/Eu*、Ni/Co、U/Th、Y/Ho、Sr/Ba、Sr/Cu等元素比值表明，该地层形成于受河流影响的浅海环境，古氧化还原条件强，古盐度低，气候温暖湿润。目前的地球化学数据补充了以前对Tidong河谷地层的沉积学研究，并与Spiti地区的地球化学数据进行了比较评价。

附：英文原文

Title: Geochemical signatures of Cambrian clastic sediments from Tidong Valley (Kinnaur), Tethyan Himalaya: Tracing continental island arc magmatism along the northern margin of the Indian plate

Author: Negi, Ranveer Singh, Singh, Birendra Pratap, Bhargava, Om Narain, Ali, Sajid, Sharma, Anupam

Issue&Volume: 2025-07-17

Abstract: The Cambrian basin of the Tethyan Himalaya lies along the northern margin of the Indian Plate. For the first time to our knowledge, the clastic sediments of the Kunzam La Formation (Cambrian Series 2–Stage 4) in the Tidong Valley, Kinnaur, have been subjected to a geochemical investigation. Analysis of rare earth elements and trace elements, supported by sandstone petrography and modal analysis, indicates a mixed provenance—primarily felsic (UCC composition) with some basic (HFSE-depleted) input—suggesting derivation from continental crustal melts in an active marginal continental island arc setting, linked to recycled orogens. The Cambrian basin was subsequently obliterated by the Late Cambrian-Early Ordovician Kurgiakh Orogeny, accompanied by extensive acidic magmatism and metamorphism. Elemental ratios of Ce/Ce*, Eu/Eu*, Ni/Co, U/Th, Y/Ho, Sr/Ba, and Sr/Cu, suggesting the formation, were deposited in a shallow marine environment with fluvial influence under highly oxidizing palaeo-redox conditions, low palaeo-salinity, and a warm, humid climate. The present geochemical data complement previous sedimentological studies of the formation in the Tidong Valley and enable a comparative assessment with geochemical data from the Spiti region.

DOI: 10.1007/s11631-025-00805-7

Source: https://link.springer.com/article/10.1007/s11631-025-00805-7