湘东北横洞钴矿床白垩纪时期白云母Ar-Ar年龄数据

文档内容包括湖南横洞钴矿床地区白云母的Ar-Ar年龄数据。实验方法如下：将选定的样品粉碎成60-80目，然后在双目显微镜下手工挑选白云母，并在用去离子水的超声波浴中清洗 30分钟。将矿物分离物纯化至99%后，将制备的白云母样品和监测标准黑云母ZBH-25（约 132.5 Ma）在中国原子能研究所的49-2反应堆中照射25小时。冷却3个月后，用40Ar-39Ar激光加热法分析样品。这些值的校正因子为：(39Ar/37Ar)Ca=0.000653，(36Ar/37Ar)Ca=0.000271，(40Ar/39Ar)K=0.00703。使用Steiger和Jager(1977)计算的40K的总衰减常数。使用ArArCALC软件计算并绘制40Ar/39Ar结果。数据可供后期湖南横洞钴矿床及湘东北地区类似矿床的地球化学分析。
以上数据已发表于SCI高级别期刊，数据真实可靠。数据以Word文档形式储存。

The document contains Ar-Ar age data of muscovite from the Hunan Hengdong cobalt deposit area. The experimental procedures are as follows:
Selected samples were crushed to a particle size of 60-80 mesh, then muscovite was hand-picked under a binocular microscope and cleaned in an ultrasonic bath with deionized water for 30 minutes. After the mineral separates were purified to a purity of 99%, the prepared muscovite samples and the monitoring standard biotite ZBH-25 (approximately 132.5 Ma) were irradiated in the 49-2 reactor of the China Institute of Atomic Energy for 25 hours. After cooling for three months, the samples were analyzed via the 40Ar-39Ar laser heating method. The correction factors for the analytical values are: (39Ar/37Ar)Ca = 0.000653, (36Ar/37Ar)Ca = 0.000271, and (40Ar/39Ar)K = 0.00703. The total decay constant of 40K reported by Steiger and Jager (1977) was adopted. The 40Ar/39Ar results were calculated and plotted using the ArArCALC software.
The data is available for subsequent geochemical analyses of the Hunan Hengdong cobalt deposit and similar deposits in northeastern Hunan Province. The aforementioned data has been published in a high-impact SCI journal, and the data is authentic and reliable. The data is stored in Word documents.