山东煌斑岩Mg、Sr、Nd同位素数据（2019-2025）

数据内容：数据提供了华北克拉通东部（NCC）古生代山东煌斑岩的Mg、Sr、Nd同位素数据。数据来源：中国地质大学（北京）同位素实验室。加工方法：将选好的样品经过化学纯化流程处理后用于多接收电感耦合等离子质谱仪MC-ICPMS的实验数据采集。数据质量：每个样品重复测试3次。通过样品-标液间插法以及内标法进行质量歧视矫正。误差以2sd给出。数据应用及前景：地球内部的二氧化碳脱气作用在漫长地质时期中调控着地表气候。本数据证明华北克拉通克拉通岩石圈地幔（CLM）曾遭受再循环碳酸盐的广泛交代作用，富碳岩石圈地幔的氧化还原熔融产生了高CO2含量的碳酸化硅酸盐熔体。这些岩浆中巨量的CO2，加上碳酸盐熔体-岩石圈地幔反应及地壳加热过程中释放的大量CO2，表明华北克拉通东部的破坏导致了快速、大规模的地幔CO2排放，这对早白垩世温室气候事件具有一定的影响。

This dataset presents Mg, Sr, and Nd isotopic data of Paleozoic lamprophyres from Shandong, Eastern North China Craton (NCC). Data source: Isotope Laboratory, China University of Geosciences (Beijing). Processing workflow: Selected samples were processed through chemical purification procedures prior to data acquisition using multi-collector inductively coupled plasma mass spectrometry (MC-ICPMS). Data quality control: Each sample was measured three times repeatedly. Mass discrimination was corrected via the sample-standard bracketing method and internal standard method. All uncertainties are reported as 2 standard deviations (2sd). Carbon dioxide degassing in the Earth's interior regulates surface climate over prolonged geological timescales. This dataset verifies that the cratonic lithospheric mantle (CLM) beneath the Eastern North China Craton underwent extensive metasomatism by recycled carbonates. Redox melting of carbon-enriched lithospheric mantle generated carbonated silicate melts with high CO₂ concentrations. The vast volume of CO₂ released from these magmas, coupled with additional CO₂ emitted during carbonate melt-lithospheric mantle reactions and crustal heating processes, suggests that the destruction of the Eastern North China Craton triggered rapid and large-scale mantle CO₂ emissions, which exerted a certain impact on the Early Cretaceous greenhouse climate events.

搜集汇总

背景与挑战

背景概述

该数据集提供了华北克拉通东部古生代山东煌斑岩的Mg、Sr、Nd同位素数据，数据来源于中国地质大学（北京）同位素实验室，采用化学纯化和MC-ICPMS方法采集，每个样品重复测试3次以保障质量。数据用于研究岩石圈地幔的碳酸盐交代作用及其对早白垩世CO2排放和温室气候事件的影响，具有重要的地球科学应用价值。