地质科技情报2013，Vol.32Issue(1)：8-12,5.
黔北务正道地区早二叠世大竹园期岩相古地理及其对铝土矿的控矿意义
Lithofacies Paleogeography of the Dazhuyuan Age, Early Permian in the Wuchuan-Zheng' an-Daozhen Area, Northern Guizhou Province and Its Implication for Bauxitisation
摘要
Abstract
This paper reports a lithofacies palaeogeographic study of the Dazhuyuan age. Early Permian in the Wuchuan-Zheng'an-Daozhen area, northern Guizhou Province and its implication for the regional bauxitisation. It is suggested that tropic hot and humid paleoclimate and development of laterized Fe-Al weathering crust were the prerequisite for the regional bauxitisation, whereas weathering and erosion of basement shales from the long-term uplifted terrain had abundantly led to the bauxite deposits. It is also shown that the depression sites in paleogeomorphology greatly benefited deposition of the high-Al sediments and then their bauxitisation. Lithofacies paleogeographic proofs indicate that the ore-hosted sedimentary strata were developed in a semi-enclosed and stable bay, and that due to frequently recycling of transgression-regression during the Dazhuyuan age, Early Permain, the sedimentary profiles experienced multiple switches between reduction and oxidation conditions, which promoted high-grade bauxitesation.关键词
黔北务正道/铝土矿/岩相古地理/早二叠世/控矿意义Key words
Wuchuan-Zheng'an-Daozhen area in northern Guizhou Province/ bauxite/ lithofacies paleogeography/ Early Permain/ metallogenic implication分类
天文与地球科学引用本文复制引用
雷志远,翁申富,陈强,熊星,潘忠华,和秀林,陈海..黔北务正道地区早二叠世大竹园期岩相古地理及其对铝土矿的控矿意义[J].地质科技情报,2013,32(1):8-12,5.基金项目
贵州省地勘基金项目"贵州务正道地区铝土矿基础地质和成矿规律研究" （）
