地质找矿论丛
地質找礦論叢
지질조광론총
CONTRIBUTIONS TO GEOLOGY AND MINERAL RESOURCES RESERCH
2001年
2期
94-98
,共5页
构造-岩浆活动%金成矿作用%中川地区%西秦岭
構造-巖漿活動%金成礦作用%中川地區%西秦嶺
구조-암장활동%금성광작용%중천지구%서진령
中川地区历经了韧性→脆韧性→脆性变形3阶段,遭受了3期5次岩浆侵入.李坝式金矿床为中低温浅成热液-岩浆再造矿床,其矿源层主要为晚古生代沉积建造,成矿过程经历了早期金元素活化迁移阶段、构造-热液成矿作用改造阶段和印支&燕山期岩浆作用再造阶段.区域性深大断裂是成矿热循环的主通道,成矿流体以大气降水为主,有部分岩浆流体参与成矿.
中川地區歷經瞭韌性→脆韌性→脆性變形3階段,遭受瞭3期5次巖漿侵入.李壩式金礦床為中低溫淺成熱液-巖漿再造礦床,其礦源層主要為晚古生代沉積建造,成礦過程經歷瞭早期金元素活化遷移階段、構造-熱液成礦作用改造階段和印支&燕山期巖漿作用再造階段.區域性深大斷裂是成礦熱循環的主通道,成礦流體以大氣降水為主,有部分巖漿流體參與成礦.
중천지구력경료인성→취인성→취성변형3계단,조수료3기5차암장침입.리패식금광상위중저온천성열액-암장재조광상,기광원층주요위만고생대침적건조,성광과정경력료조기금원소활화천이계단、구조-열액성광작용개조계단화인지&연산기암장작용재조계단.구역성심대단렬시성광열순배적주통도,성광류체이대기강수위주,유부분암장류체삼여성광.
Zhongchuan area underwent ductile→ductile-brittle→brittle deformation with 3 periods and 5 times of magmatic intrusion. Liba style Au deposits are medium-low epithermal-magma reworked deposits. Late palaeozoic sedimentary formations are the source beds. Ore formation included the early Au mobilization and transportation, tectonic-hydrothermal rework and Indo-China-Yanshanian magmatism rework. The regional deep fractures are main conduit of ore fluid which is dominated by meteoric water.
