Control of Structure on the Distribution and Morphological Characteristics of Ore Bodies in Hainan Shilu Iron Deposit
The Shilu syncline is the main controlling structure of the Shilu iron mine,which is characterized by both flexural slip/flexural flow folds(formed by bedding shear)and neutral-plane folds.Based on the distribution and morphology of iron ore bodies in the Shilu mine,it is found that the main distribution area of iron ore bodies is located in the flanks of the secondary folds,which is equivalent to the shear strain zone of the flexural slip/flexural flow folds(simple shear strain).The secondary distribution area is located in the core of the secondary folds,which corresponds to the compressional strain region(pure shear strain)of the neutral-plane folds.The iron bodies,especially the rich ones,are mostly elongated lens-like and lamellar in the flanks of the longitude-bending folds,which are similar to the strain lens in bedding shearing.In the core area,the ore bodies occur mostly in coarse lenticular or irregular mass,which is also in close relationship to the shape of the compressional strain lens in the folding of the neutral-plane.The Shilu complex syncline not only modifies and controls the form and distribution of the iron ore bodies but also contributes to the enrichment and formation of rich iron bodies.The distribution and morphological characteristics of iron ore bodies in the Shilu mining area reflect the metallogenic law of longitudinal folds,which is a macroscopic reflection of longitudinal folds mineralization and macroscopic evidence of longitudinal folds mineralization.
Shilu iron mineore body distributionore body morphological characteristicslongitudinal fold mineralizationore-controlling structureHainan Province
万方数据
维普
