The Geology of Upper Baleh River, Kapit, Sarawak
The Geology of Upper Baleh River, Kapit, Sarawak
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砂拉越加帛巴勒河上游的地质
DOI：
10.33736/bjrst.1220.2018
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发表时间：
2018
影响因子：
--
通讯作者：
G. Noweg
中科院分区：
文献类型：
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作者：
E. Muol;G. Noweg
2015年11月中旬，在婆罗洲之心探险期间，与马来西亚沙捞越大学生物多样性和环境保护研究所合作，对沙捞越拟议的Baleh国家公园进行了地质测绘。研究区的地质图与以前研究的地图一起编制。拟议中的Baleh国家公园由高原和山脉组成。研究区的地形地貌与地质关系密切。高原下为火山岩，火山岩主要由凝灰岩和英安岩组成，其中有零星的集块岩，而山脉则是东西走向的山脊，其下为拉亚尔段的板岩与粉砂岩、砂岩和泥质碎屑砾岩互层。贝拉加组的Layar段是晚白垩世[100.5-66百万年前（ma）]的一套深海海洋沉积。武吉提班高原是由于晚中新世（11.6-5.3 ma）的火山爆发而形成的。在研究区域观察到几个有趣的地质遗迹。
关键词：Bukit Tiban，柱状节理，英安岩，地质遗迹，Layar段
Geological mapping of the proposed Baleh National Park, Sarawak was conducted during the Heart of Borneo Expedition in Mid November 2015 with Institute of Biodiversity and Environmental Conservation, Universiti Malaysia Sarawak. A geological map of the study area is compiled together with maps of the previous studies. The proposed Baleh National Park is made up of plateau and mountain chains. The topography of the study area is closely related to the geology. The plateau is underlain by the volcanic rocks which consists predominantly of tuff and dacitic rocks with scattered agglomerate, while the mountain chains are the ridges which striking east-west direction are underlain by slate interbedded with siltstone, sandstone and mud clast conglomerate of the Layar Member. The Layar Member of the Belaga Formation is suit of deep ocean marine deposits during the Late Cretaceous [100.5–66 million years ago (ma)]. The plateau of the Bukit Tiban was formed as a result of the volcanic eruption during the Late Miocene (11.6–5.3 ma). Several interesting geoheritage sites were observed in the study area.
Keywords: Bukit Tiban, columnar joints, dacite, geoheritage, Layar Member