华南地质与矿产
華南地質與礦產
화남지질여광산
GEOLOGY AND MINERAL RESOURCES OF SOUTH CHINA
2011年
4期
265-272
,共8页
陈沐龙%李孙雄%官军%曾雁玲
陳沐龍%李孫雄%官軍%曾雁玲
진목룡%리손웅%관군%증안령
褶皱变形特征%成矿时代%成矿机理%石碌群%海南岛
褶皺變形特徵%成礦時代%成礦機理%石碌群%海南島
습추변형특정%성광시대%성광궤리%석록군%해남도
fold deformation feature%metallogenetic epoch%metallogenic mechanism%Shilu group%Hainan island
青白口系石碌群属于一套海相沉积经变质的以细粒碎屑岩、泥岩及镁质碳酸岩夹火山岩为原岩的变质岩系组合,赋存有沉积变质型铁矿和热液型铜钴矿。岩石经历了多期次变形作用的改造,总体表现为由褶皱变形往韧脆性断裂变形演化的特征,褶皱变形包含了三个变形序列的构造形迹组合。与铁矿主成矿期密切有关的NW向石碌复向斜属于海西.印支期造山运动的产物。铜钴矿成矿物质与海西.印支期岩浆侵入活动有关,并由于受石碌复向斜的改造,导致其与沉积变质型铁矿空间分布上的协调一致。
青白口繫石碌群屬于一套海相沉積經變質的以細粒碎屑巖、泥巖及鎂質碳痠巖夾火山巖為原巖的變質巖繫組閤,賦存有沉積變質型鐵礦和熱液型銅鈷礦。巖石經歷瞭多期次變形作用的改造,總體錶現為由褶皺變形往韌脆性斷裂變形縯化的特徵,褶皺變形包含瞭三箇變形序列的構造形跡組閤。與鐵礦主成礦期密切有關的NW嚮石碌複嚮斜屬于海西.印支期造山運動的產物。銅鈷礦成礦物質與海西.印支期巖漿侵入活動有關,併由于受石碌複嚮斜的改造,導緻其與沉積變質型鐵礦空間分佈上的協調一緻。
청백구계석록군속우일투해상침적경변질적이세립쇄설암、니암급미질탄산암협화산암위원암적변질암계조합,부존유침적변질형철광화열액형동고광。암석경력료다기차변형작용적개조,총체표현위유습추변형왕인취성단렬변형연화적특정,습추변형포함료삼개변형서렬적구조형적조합。여철광주성광기밀절유관적NW향석록복향사속우해서.인지기조산운동적산물。동고광성광물질여해서.인지기암장침입활동유관,병유우수석록복향사적개조,도치기여침적변질형철광공간분포상적협조일치。
The Shilu Group of Qingbaikou System is composing of metamorphic rock series, whose protolith is marine fine grained clastic rock, mudstone and magnesian carbonatite with interbedded volcanic rock. Parametamorphic iron ore deposits and hydrothermal copper-cobalt deposits are hosted in the Shilu group, which has undergone several times of deformation, and evolution from fold deformation including three struc- ture assemblages of deformation sequence to brittle-ductile fracture. Shilu NW-trending synclinorium, which is the production of Hercynian-Indosinian orogeny, has a close relation with principal metallogenic epoch of iron deposit. The spatial distribution of copper-cobalt deposits, whose metallogenic material may be provided by Hercynian-Indosinian magma intrusion is consistent with parametamorphic iron deposits because of both are reshaped by Shilu NW-trending synclinorium.