摘要
320矿床的含矿土岩是一套强烈硅化(角)砾状和(角)砾质岩,是地洼初动期岩溶洞穴沉(堆)积岩——以钙屑岩为主的混杂陆源沉积岩,受硅化形成。硅化主要发育于岩溶沉积岩中,并波及它附近的地层。这一事件发生于地洼余动期初,形成于低温环境,硅来自沉积岩源,流体起源于大气降水。320矿床是一个硅化改造的古岩溶矿床,它与美国亚利桑那州的硅化溶解-塌陷角砾岩筒相同。这类矿床在华南碳酸盐岩地区找矿潜力很大。
The host rock in the deposit No. 320 is composed of a suite of strongly silicified brecciated rock and breccia, which was formed by the silicification of karst cave accumulative rock——diamictite mainly consisting of calcarenyte at the initial-mobility period of Diwa. The silicification was primarily developed in karst sediments and also spread to its strata nearby. This event occurred at the beginning of the residual-mobility period of Diwa,and was formed in a low temperature environment. Silicon came from the source of sedimentary rock and fluids originated from the meteoric water. The deposit No. 320 is a palaeokarst deposit resulted from the silicification and reworking which is same as the silicified solution-collapse breccia pipe in Arizona,USA. This type of deposit is of a large potential for the prospecting in the carbonate rock area,south China.
出处
《铀矿地质》
CAS
CSCD
北大核心
1993年第1期6-13,共8页
Uranium Geology
关键词
地洼型
古岩溶矿床
大气降水
热水
硅化
Diwa type,Palaeokarst deposit, Meteoric water,Thermal water,Silicification
