中国煤炭地质
中國煤炭地質
중국매탄지질
COAL GEOLOGY OF CHINA
2015年
4期
11-15,20
,共6页
流纹斑岩%花岗斑岩%流纹岩%张家口组%张纪煤矿东部%冀西北
流紋斑巖%花崗斑巖%流紋巖%張傢口組%張紀煤礦東部%冀西北
류문반암%화강반암%류문암%장가구조%장기매광동부%기서북
rhyolite porphyry%granite-porphyry%rhyolite%Zhangjiakou Formation%eastern part of Zhangji coalmine%northwestern Hebei
河北省西北部张纪煤矿东部地表出露有大面积酸性火成岩，以往地质资料将其划归张家口组，近期地质工作证实该火成岩地表部分岩性为流纹斑岩，向深部相变为花岗斑岩，前者属于后者的边缘相，岩体厚度大于2000 m，产状应为岩株。该岩体范围内原有的下花园组已被吞蚀殆尽，失去找煤意义。
河北省西北部張紀煤礦東部地錶齣露有大麵積痠性火成巖，以往地質資料將其劃歸張傢口組，近期地質工作證實該火成巖地錶部分巖性為流紋斑巖，嚮深部相變為花崗斑巖，前者屬于後者的邊緣相，巖體厚度大于2000 m，產狀應為巖株。該巖體範圍內原有的下花園組已被吞蝕殆儘，失去找煤意義。
하북성서북부장기매광동부지표출로유대면적산성화성암，이왕지질자료장기화귀장가구조，근기지질공작증실해화성암지표부분암성위류문반암，향심부상변위화강반암，전자속우후자적변연상，암체후도대우2000 m，산상응위암주。해암체범위내원유적하화완조이피탄식태진，실거조매의의。
Large area of acidic igneous rock has outcropped in eastern part of Zhangji coalmine, northwestern Hebei. In the past geologi?cal information had put them into Zhangjiakou Formation. But recent geological works have confirmed that the surface part of the igne?ous rock is rhyolite porphyry, to deep part lithofacies changing into granite-porphyry, the former is the border facies of the later, thick?ness of the rock mass larger than 2 000 m, occurrence as stock. Within the rock mass extension, the original Xiahuayuan Formation al?ready had been eroded all, thus has no longer any coal prospecting significance.
