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1958—1959年大跃进中,我們曾在某地硷性岩体的正长岩中发現晶形十分完美的黑色矿物,經室內研究后,証明其为板钛矿(見63頁图1),并且含Nb_2O_5达0.57％。这在我国恐是一个新的产出矿物。一、产状和物理性貭板钛矿产地系一硷性杂岩体,侵入于寒武紀石灰岩和侏罗紀砂岩和砾岩中,侵入时代为下侏罗紀。硷性杂岩体主要由硷性正长岩和霞石正长岩組成,正长岩侵入較早,主要位于岩体的边部。板钛矿产于与侏罗紀砂岩接触的正长岩中,呈脉状及浸染状。正长岩含有相当量的石英,可能为围岩混染所致。板钛矿都成完美的晶体,呈菱形,长寬几乎相等,自0.7—0.15厘米,厚自0.25—0.1厘
During the Great Leap Forward of 1958-1959, we discovered the perfect crystalline black mineral in the syenite of a certain alkaline rock body. After laboratory study, it was proved to be brookite (see Figure 1 on page 63) And containing Nb2O5 up to 0.57%. This is probably a new output mineral in our country. First, the physical and physical properties of bauxite taphoid origin of an alkaline complex body, intruded into the Cambrian limestone and Jurassic sandstone and conglomerate, the invasion of the era for the next Jurassic. Alkaline complex body is mainly composed of alkaline syenite and nepheline syenite, the syenite intrusion earlier, mainly located in the rock’s edge. The brookite is produced in the syndesmite in contact with the Jurassic sandstone, showing veins and disseminated. Syenite contains a considerable amount of quartz, probably due to surrounding rock contamination. Bricks are the perfect crystal, rhombuses, almost the same width and length, from 0.7-0.15 cm, thickness 0.25-0.1%