CAJ | 학술논문

岩浆侵入的流体流动模拟表明.侵入体上方是流体聚焦流动的位置,流体通量远大于旁侧围岩,流体在此产生沸腾作用.随温度降低,侵入体上方渗透率逐渐增大,最大渗透率出现在侵入体的顶部.含水岩浆侵位后在其顶上带发生二次沸腾和减压过程,释放出的巨大机械能远大于围岩的抗张强度,足以引起围岩发生脆性破坏.岩浆岩顶上带的水饱和外壳及其围岩发生破裂形成陡倾裂隙和水力破裂.直立长椭球状岩浆体的侵入会在岩浆岩顶上带产生放射状和同心圆状裂隙,同时产生爆破角砾岩筒.因此侵入体顶上带的岩钟、岩枝、岩脉,放射状、同心圆状裂隙和角砾岩筒均为构造弱化带,是热液矿脉密集发育的部位.矿床地质学研究已充分证明.岩浆岩顶上带确是容纳与中酸性岩浆有关的热液矿床的最佳部位.在开展深部成矿预测和找矿的过程中,探寻隐伏岩体项上带和/或岩钟.是寻找深部与花岗岩类有关的多金属矿床的捷径.
암장침입적류체류동모의표명.침입체상방시류체취초류동적위치,류체통량원대우방측위암,류체재차산생비등작용.수온도강저,침입체상방삼투솔축점증대,최대삼투솔출현재침입체적정부.함수암장침위후재기정상대발생이차비등화감압과정,석방출적거대궤계능원대우위암적항장강도,족이인기위암발생취성파배.암장암정상대적수포화외각급기위암발생파렬형성두경렬극화수력파렬.직립장타구상암장체적침입회재암장암정상대산생방사상화동심원상렬극,동시산생폭파각력암통.인차침입체정상대적암종、암지、암맥,방사상、동심원상렬극화각력암통균위구조약화대,시열액광맥밀집발육적부위.광상지질학연구이충분증명.암장암정상대학시용납여중산성암장유관적열액광상적최가부위.재개전심부성광예측화조광적과정중,탐심은복암체항상대화/혹암종.시심조심부여화강암류유관적다금속광상적첩경.
The simulation of magma fluid flowing in and around granite plutons indicates that the top zone, apical or cupola of intru sion are the locations of focused fluids flow, where fluid flux is larger than the lateral wallrock. After the emplacement of hydrous magmas, two sequential processes play critical roles: the process of second boiling and decompression. The mechanical energy released in die second boiling exceeds the maximum tensile strength of the wallrock, which can produce extensive fracture failures. Because die axis of least principal stress in die shallow crustal environment generally lies essentially in die horizontal plan, failure of die roof rocks including die H_2O-saturated carapace and wallrock produces myriad steeply dipping fractures and hydro-fracturing. The cupola and apical of magma body and the radial and concentric fracture systems, breccia pipes occurred in and around prolate magma body are structural weak zones, diey can provide excellent accomodation for granite-related hydrodiermal minerals. During the prospecting of hidden and concealed granite-related polymetallic deposits, it is a shortcut to explore the top zone or cupola of hidden intrusions.