已探明储量 meaning in Chinese

known economic reserves in places
proved reserves

With unique and rich land resources , 50 , 000mu land forming from the tidal in yancheng coastal line . there is abundance natural gas which 210 billion cubic meters have been developed already
盐城土地资源得天独厚，淤积性海岸每年向大海延伸5万亩土地；天然气资源也非常丰富，已探明储量2100亿立方米。
The municipality has 49 kinds of minerals with proved reserves and 218 mineral deposits , and the main minerals include coal , lead , zinc , copper , iron , tungsten , antimony , cement limestone and granite , of which 35 kinds rank top three and 23 kinds top one in the province
全市已探明储量的矿产49种，矿床218个，主要矿种有煤炭、铅、锌、铜、铁、钨、锑、水泥灰岩、花岗石等，其中保有储量位居全省前三位的有35种，居第一位的有23种。
There are abundant copper ore resources and mineralization types of copper ore deposits in gansu , china , but the reserves explored is not concordant with of intensity of copper mineralization , which in the providing reserves for important bases of the copper mine productions there is a serious question
甘肃铜矿资源丰富，成矿类型发育齐全。但是，已探明储量与铜矿化强度极不相称；重要铜矿生产基地的资源保障形势严峻。深化区域成矿规律认识与拓宽勘查研究思路尤为重要。