| 陕西岚皋－镇坪一带早古生代火山杂岩成岩构造环境及碱（钾）质煌斑岩含矿性探讨 |
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| 引用本文： | 杨钟堂,杨星,刘少峰.陕西岚皋－镇坪一带早古生代火山杂岩成岩构造环境及碱（钾）质煌斑岩含矿性探讨[J].西北地质科学,1997(1). |
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| 作者姓名： | 杨钟堂 杨星 刘少峰 |
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| 作者单位： | 中国地质科学院西安地质矿产研究所，陕西省地质矿产勘查开发局第七地质队 |
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| 摘 要： | 对北大巴山地区岚皋－镇坪一带的区域地质构造演化及其与早古生代碱基性火山杂岩的成岩关系进行了综合分析，指出本区曾经历了裂陷－愈合一再裂陷－愈合的地质发展和演化。早古生代时期本区是一个在已固结愈合的中－晚元古代的裂陷的扬子地台北缘构造软弱带的基础上重新活化的大陆边缘陆内断陷构造带。它不仅控制了区内该时期碱基性火山杂岩的产出位置、岩浆脉动活动特征，而且还影响到岩浆物质来源的深度。在此基础上，笔者探讨了与杂岩密切相关的碱（钾）质煌斑岩的金刚石含矿性。
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| 关 键 词： | 构造演化 成岩构造控制 碱（钾）质煌斑岩 含矿性 |
STUDY ON THE DIA GENETIC TECTONIC BACKGROUND OF EARLY-PALEOZOIC IGNEOUS ROCKS AND PROBING FOR DIAMOND-BEARING POSSIBILITY IN THE ALKALINE (POTASSIC) LAMPROPHYRE |
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| Yang Zhongtang and Yangxing.STUDY ON THE DIA GENETIC TECTONIC BACKGROUND OF EARLY-PALEOZOIC IGNEOUS ROCKS AND PROBING FOR DIAMOND-BEARING POSSIBILITY IN THE ALKALINE (POTASSIC) LAMPROPHYRE[J].Northwest Geoscience,1997(1). |
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| Authors: | Yang Zhongtang and Yangxing |
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| Abstract: | Regional tectonic evolution of Langao Zhenping area and its relation with dlagenetic ofearly-Paleozoic igneous rocks have been synthetically researched. It shows that the area inthe earlyupaleozoic era was a rift zone arised along the Northern border of Yangtze platform.Which was being reactive on the bases of the Mid-Late Proteroaolc refting. Occurrence of therocks and activity of the magma as well as its source depth are well controlled by this tectonic background condition. It has been inferred in the paper that the diamond-bearing possibility in the alkaline (potassic ) lamprophyre distributed in the area could be low. |
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| Keywords: | tectonic evolution diagenetic control diamond alkaline (potassic )lamprophyre |
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