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海南岛、粤东、闽西南是广东、福建两省层控富铁矿的主要分布区,储量达数十亿吨,富矿占70%以上.目前,这些铁矿分别称为“石碌式”、“大顶式”、“马坑式”等. 大地构造单元海南岛、粤东、闽西南所处大地构造位置的性质十分相似.吴川-四会大断裂、东江大断裂(呈北东30～40°)、邵武-河源大断裂、政和-海丰大断裂(呈北东40～50°)斜贯闽粤两省,并向南西方向延伸进入海南岛.两组大断裂至海南岛有收拢之势.吴川一四会大断裂西北部为粤桂隆起区(Ⅰ),政和一海丰大断裂东南部为闽粤中生代断陷带(Ⅲ),这两组大断裂之间便构成华夏构造系上古生代断陷带(Ⅱ)(图1),即海南-粤东-闽西南断裂拗陷带,其中的层状富铁矿属于同一铁矿成矿带.
Hainan Island, eastern Guangdong and southwestern Fujian are the main distribution areas controlling rich iron ore in Guangdong and Fujian provinces, with reserves of billions of tons and rich ore accounting for more than 70% .At present, these iron mines are respectively called “Shilu-type” , “Big Top”, “Ma Hang”, etc. The tectonic units of the tectonic units in Hainan Island, eastern Guangdong and southwestern Fujian are very similar in terms of the tectonic positions of the earth’s tectonics: Wuchuan-Sihui Large Fault and Dongjiang Large Fault ~ 40 °), Shaowu-Heyuan fault, Zhenghe-Haifeng great fault (40 ~ 50 ° North East) slanting through Fujian and Yue provinces and extending southwest to Hainan Island. (1), the southeastern part of the Zhenghe-Haifeng great fault is the Min-Yue Cenotropical rift zone (Ⅲ), and the two large faults form Huaxia The Paleozoic rift belt (Ⅱ) (Fig. 1) of the tectonic system is the Hainan-East Guangdong-Fujian Southwest fault depression belt, in which the layered iron-bearing iron ore belongs to the same iron ore belt.