从地洼成矿作用看中国某些优质锰矿的成因与远景

研究发现中国某些优质锰矿,属复成矿床,它们都是地洼成矿作用的产物。福建连城锰矿就是典型实例,类似矿床特别是复成风化锰矿,还见于闽西南-粤东北及湖南。滇东南一些锰矿,例如著名的斗南锰矿与白显锰矿的成因,也可能与地洼成矿作用有一定联系。分析对比了一些优质复成锰矿和一些较贫的复成锰矿的成矿地质条件。从地洼成矿作用可以看出中国某些优质锰矿的成因与远景。提出在中国东南地洼区、南北地洼区南端及云贵地洼区某些地方,寻找优质复成风化锰矿与复成菱锰矿—硫锰矿矿床是较有希望的。

STUDY ON GENESIS AND PERSPECTIVE OF SOME HIGH QUALITY MANGANESE ORE DEPOSITS IN CHINA

Some high quality manganese ore deposits of China are found to be polygenetic compound ore deposits which are the products of diwa mineralization. Liancheng manganese ore district, Fujian, is a typical example. Similar deposits can be found in East Guangdong-West Fujian and Hunan. The genesis of some ore deposits in Southeast Yunnan, for example, those in Dounan and Beixian, maybe relate to diwa mineralization. Geological conditions of the mineralization of some high grade manganese ore deposits have been analyses and contrasted with other comparatively poor manganese ore deposits. Diwa mineralization may tell us some thing about the genesis and perspective of high quality manganese ore deposits. It is pointed out that South-East China diwa region, the South tip of North-South diwa region and some parts of Yunnan-Guizhou diwa region are more prospective for the reconnaissance geological survey and exploration of high grade polygenetic compound weathering manganese and rhodochrosite-alabandite ore deposits in China.