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对青海柴达木盆地察尔汗、昆特依盐湖以及新疆罗布泊盐湖一系列沉积物样品进行了穆斯堡尔效应的研究。对全部样品做了常温下的穆斯堡尔谱学测量,并对部分样品做了低温下的测量。从穆斯堡尔谱的解析结果可知,盐湖沉积物黏土矿中含二价铁的主要矿物是绿泥石,在察尔汗盐湖样品中有少量菱铁矿;三价铁存在于多种矿物和非晶态的氢氧化物中;某些样品中含有少量的赤铁矿,它在常温下即出现磁有序。不同盐湖的沉积物样品和同一盐湖不同深度样品的含铁矿物组成及相对含量不同,Fe2+/Fe3+的比值也不同。这些结果可以反映出盐湖沉积过程中地球化学和环境及气候的变化。
A series of Mossbauer effect studies were carried out on a series of sediment samples from Chaer Khan, Quetzal in Qaidam Basin and Lop Nur in Xinjiang. Mossbauer spectroscopy was done on all the samples at room temperature, and some samples were measured at low temperature. According to the analytical results of Mossbauer spectroscopy, the main mineral containing ferrous iron in the clay deposits of salt lake sediments is chlorite, and there is a small amount of siderite in the samples of Chaerhan Salt Lake. The ferric exists in many minerals And amorphous hydroxides; some samples contain a small amount of hematite, which is magnetically ordered at room temperature. The sediment samples of different salt lakes and iron ore samples with different depths in the same salt lake have different compositions and relative contents of Fe2 + / Fe3 +. These results can reflect changes in geochemistry and environment and climate during the salt lake sedimentation.