辽宁省金刚石原生矿成矿规律与成矿模式研究

Study on Metallogenic Regularity and Metallogenic Model of Primary Diamond Deposits in Liaoning Province

辽宁省金刚石成矿地质条件优越,金刚石储量占全国储量的52%。通过对辽宁省铁岭、桓仁、锦西地区金伯利岩,特别是瓦房店地区金伯利岩及典型金刚石矿床的综合研究,本文对辽宁省金刚石原生矿床产出的地质条件及其分布规律进行详细总结。重点论述了金刚石原生矿矿床的区域地质特征、空间分布规律、控矿因素,探讨了金刚石原生矿矿床的区域成矿模式,将研究区Ⅲ级成矿带分为铁岭-大连、新宾-岫岩、桓仁-庄河、旧庙-建平、北镇-绥中等5个Ⅲ级金刚石成矿带,并以瓦房店地区为例,划分了4个金伯利岩矿带,认为金伯利岩管与金伯利岩侵入过程中形成的弧(环)状构造体系有关,当岩浆上拱时先形成穹隆,尔后随着挥发分的释放和岩浆上侵出现的峒室的下沉,形成构造盆地,环状构造是寻找金伯利岩的重要区域。

Geological conditions of diamond mineralization in Liaoning province are superior.Diamond reserves account for 52%in China.In order to strengthen the macrocontrol of diamond geological survey and mineral resources exploration,and promote healthy and orderly development of geological exploration industry,through comprehensive study of Kimberley Rock in Tieling,Yanren and Jinxi regions of Liaoning province,especially comprehensive study of Kimberley rock and typical diamond deposits in Wafangdian area,geological conditions and distribution laws of diamond primary deposits in Liaoning province have been summarized in detail.Regional geological characteristics,spatial distribution law and control factors of diamond primary deposits in Liaoning province have been analyzed,and regional metallogenic model of diamond primary ore deposit has been discussed.Ⅲmineralization belt in the study area is divided into 5Ⅲdiamond mineralization belts,they are Tieling Dalian,Xinbin Xiuyan,Huanren Zhuanghe,Jiumiao Jianping and Beizhen Suizhong.Taking Wafangdian area as an example,4 Kimberley rock belts are divided.It is believed that Kimberley rock pipe is related to arc(ring)structure system formed during the Kimberley rock intrusion.Dome will form first when the magma arches,and then forms a tectonic basin with the release of volatiles and the sinking of the mountain chambers that appear on the magma invasion,and form a tectonic basin.The ring structure is an important area for searching for Kimberley rock.