Primary, Bedded, Structureless Phosphorite of the Khubsugul Basin, Mongolia
Primary, Bedded, Structureless Phosphorite of the Khubsugul Basin, Mongolia
复制标题
蒙古库苏古尔盆地原生层状无结构磷矿
DOI：
10.1306/212f7e69-2b24-11d7-8648000102c1865d
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发表时间：
1981
影响因子：
2
通讯作者：
G. I. Ratnikova
中科院分区：
文献类型：
--
作者：
A. Ilyin;G. I. Ratnikova
摘要 蒙古库苏古尔盆地存在上文特纪（元古界）至下寒武统的磷酸盐系列。这些磷矿中未风化的、层状的、隐晶质的、无结构的磷矿（微磷矿）相对丰富。其在前寒武纪末期至早寒武世西伯利亚大陆架内部浅水区的正化学降水是根据地层学和岩石学的考虑建立的。微粒磷矿是其他岩相类型磷矿的母体材料，其形成是通过微粒磷矿的崩解而形成的砾岩和角砾岩，以及通过微粒磷矿的造粒而形成的粒状和丸状磷矿。虽然崩解和造粒是由于较高的能量环境造成的，但颗粒的运输很少发生。基质磷灰石的白云石化是粒化过程的重要部分。这些不同类型的磷矿紧密地互层在两个磷酸盐单元的较低者中。
ABSTRACT A phosphatic series of Upper Vendian (Proterozoic) to Lower Cambrian age occurs in the Khubsugul Basin, Mongolia. Unweathered, bedded, aphanitic, structureless phosphorite (microsphorite) is relatively abundant in these phosphorites. Its orthochemical precipitation in shallow water on the inner portion of the Siberian continental shelf of latest Precambrian to Early Cambrian time is established from stratigraphic and petrographic considerations. The microsphorite was the parent material for other petrographic types of phosphorite, which formed both by disintegration of the microsphorite to give intraformational conglomerate and breccia and by granulation of the microsphorite to give granular and pelletal phosphoritc. Although disintegration and granulation were due to a higher energy nvironment, little transportation of grains occurred. Dolomitization of matrix apatite was a significant part of the process of granulation. These various types of phosphorite are intimately interbedded in the lower of two phosphate units.