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本文是地质部第一海洋地质调查大队于1972年至1976年间,对南黄海西北部海区 进行1/50万区域沉积地貌调查基础上写成的调查范围为北纬34°—37°,东经123°以西至江苏、山东沿岸地带(图1),面积约8万多平方公里。共采集1335个矿物鉴定样品,其中柱状样采样深度一般为几十厘米到二米。经对>0.25毫米、0.25—0.10毫米、0.10—0.05毫米、<0.05毫米等几个粒级中重矿物含量变化情况的对比,发现重矿物多存在于0.10—0.05毫米粒级中,故选用此粒级作为矿物鉴定和计算的代表。采用淘洗法进行分离,并作镜下鉴定。其它粒级选取部分样品作分离和鉴定。
This article is from the 1972 to 1976, the first marine geological survey unit of the Ministry of Geology on the northwestern South Yellow Sea 1,500,000 regional sedimentary topography survey based on the survey ranged from latitude 34 ° -37 °, east longitude 123 ° To Jiangsu, Shandong coast (Figure 1), an area of about more than 80,000 square kilometers. A total of 1335 samples of mineral identification were collected, of which the sampling depth of the column is generally tens of centimeters to two meters. By comparing the changes of heavy minerals in several fractions of> 0.25mm, 0.25-0.10mm, 0.10-0.05mm, <0.05mm and so on, it is found that the heavy minerals mostly exist in the grain size of 0.10-0.05mm. Therefore, Grain size as a representative of mineral identification and calculation. Using washing method for separation, and for microscopic identification. Other fractions were selected for isolation and identification.